| HS Code | 221682 |
| Productname | No Solvent Multi-functional Silicone Oil RH-NB-8158 |
| Appearance | Colorless to light yellow transparent liquid |
| Ionicity | Weak cationic |
| Phvalue | 5.0-7.0 (1% aqueous emulsion, 25°C) |
| Solidcontent | 100% |
| Solventcontent | 0% |
| Viscosity | 1000-5000 mPa·s (25°C) |
| Waterdispersibility | Self-emulsifying and dispersible in water |
| Activecomponent | Organosilicon polymer |
| Mainfunction | Softening, smoothing, and elastic hand feel |
| Application | Textile finishing for cotton, polyester, nylon, and blends |
| Compatibility | Compatible with cationic and nonionic textile auxiliaries |
| Storage | Store in a cool, dry, ventilated place; avoid freezing |
| Shelflife | 12 months in unopened original packaging |
As an accredited No Solvent Multi-functional Silicone Oil RH-NB-8158 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 200 kg plastic-lined steel drums, or 1,000 kg IBC containers, sealed for safe industrial storage and transport. |
| Container Loading (20′ FCL) | No Solvent Multi-functional Silicone Oil RH-NB-8158 is drum-packed, labeled, and braced inside a 20′ FCL container for safe transport. |
| Shipping | Ship in sealed, properly labeled containers, protected from heat, moisture, freezing, and direct sunlight. Keep containers upright and secured during transport to prevent leakage. Avoid punctures and abrasion. Follow local regulations and the SDS, and confirm transport classification before shipment. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and moisture. Keep containers tightly closed, upright, clearly labeled, and in secondary containment to prevent leaks. Avoid incompatible materials such as strong oxidizers. Do not freeze. Protect from physical damage; keep away from food, drink, and animal feed. Follow the supplier’s SDS and local regulations. |
| Shelf Life | RH-NB-8158 silicone oil: store sealed in a cool, dry, ventilated place, away from sunlight; shelf life is typically 12 months from production date. |
Publicly available performance data for the exact low-volume designation RH-NB-8158 is limited; the process windows below derive from industrial practice with solvent-free polyether-modified polysiloxane fluids of similar functionality. In textile pad finishing, RH-NB-8158 is introduced into the pad bath as a hydrophilic softening agent at 5–20 g/L active fluid after dispersion in deionized water at 40–50°C under a high-shear mixing loop. Pad pick-up is held at 65–80% on cotton/spandex single jersey and 65–75% on cotton/polyester interlock, using pad-mangle pressure of 2–3 bar and line speed of 15–25 m/min. After padding, fabric enters a stenter with drying at 120–130°C for 60–90 s, followed by curing at 150–165°C for 60–90 s; for cotton/polyester interlock, the lower end of the cure window reduces heat-setting shrinkage. Because the fluid contains no solvent, bath stability is more sensitive to residual peroxide bleaching alkalinity than conventional solvent-borne microemulsions; the fabric after bleaching must be rinsed to a surface pH of 6.5–7.5 before entering the pad bath. The fluid can be combined with low-formaldehyde resin systems if the resin is dispersed first and the bath pH is adjusted to 5.0–6.0 before silicone addition; reversing this order produces visible precipitation on pad rolls. Handle is evaluated against a control under standardized conditioning at 20±2°C and 65±4% RH, and wicking is assessed by AATCC 79 with target drop absorption below 3 s on bleached cotton. Washfastness is tested according to ISO 105-C06 for 5 cycles at 40°C; retention of both softness and wicking after laundering depends on co-crosslinking with cellulosic hydroxyl groups and may require external polycarboxylate or blocked isocyanurate crosslinkers at 1–3 g/L. Add-on above 30 g/L on tight knits can create strike-through and reduce tear strength measured by ISO 13937-1 by more than 10% under over-dry cure conditions. The fluid should not be mixed in the same bath with cationic softener dispersions, since electrostatic coagulation produces deposits that transfer to the fabric surface and reduce absorbency.
| Parameter | Cotton/spandex single jersey | Cotton/polyester interlock |
|---|---|---|
| Pad bath concentration | 10–20 g/L | 5–15 g/L |
| Pad pick-up | 70–80% | 65–75% |
| Drying stage | 120–130°C for 60–90 s | 120–130°C for 60–90 s |
| Curing stage | 150–165°C for 60–90 s | 150–165°C for 45–75 s |
| Wicking test | AATCC 79 drop absorbency after conditioning at 20±2°C and 65±4% RH | |
| Washfastness test | ISO 105-C06 5 cycles at 40°C | |
Flexible polyurethane slabstock production can use RH-NB-8158 as a solvent-free cell stabilizer when the fluid is introduced into the polyol component at 0.8–1.5 pphp, with prior tank mixing at 25–30°C for 30 min to prevent localized silicone concentration. On conventional continuous slabstock lines, the blend is transferred through the polyol line upstream of a high-pressure mixhead operating at 120–180 bar and throughput of 60–100 kg/min; the internal exotherm reaches 120–140°C during the rise phase, and the silicone must remain dispersed rather than volatilizing into the foam gas. Air permeability is measured on cured cores using ASTM D3574 Test G, with an acceptance band of 0.6–1.2 dm³/s for open-cell foam. Over-stabilization above 1.8 pphp retains carbon dioxide and raises core density; under-stabilization below 0.5 pphp can produce top collapse near the foam surface. In stannous octoate-catalyzed systems, the fluid is checked for acidic or buffered polyether silicone species because they can deactivate tin catalysts and generate split foam. Molded MDI-based foam operations use a reduced addition of 0.5–1.0 pphp, added after the mold release agent has been sprayed, to avoid buildup on mold vent channels. Compression set is determined by ASTM D3574 Test D for 22 hours at 70°C, and cell structure is evaluated against a 10-cell/cm grid on cut sections. Amine catalyst addition must be time-separated by 5–10 min to prevent gel particle formation that clogs mixhead orifices.
High-pressure aluminum die casting operations using RH-NB-8158 as a release agent active are more sensitive to addition rate than to bulk viscosity because the film must survive one casting cycle and then either remain thin enough to vent or eject cleanly. A water-emulsified spray fluid is prepared at a dilution of 1:80 to 1:150, giving 0.7–1.2% silicone active; each nozzle delivers 0.15–0.35 mL per cycle to die surfaces held at 200–280°C by mold oil recirculation. Spray pulse time is 0.5–1.2 s, followed by air blow-off at 4–6 bar to avoid liquid pooling in deep ribs. Under-application causes soldering of molten aluminum onto steel surfaces, visible as rough patches with surface roughness exceeding Ra 0.4 µm; over-application volatilizes the release layer and contributes to gas porosity, which is evaluated by ASTM E505 reference radiographs for aluminum die castings. The operational boundary on mold surface temperature is stricter than for solvent-borne oils: below 180°C the water phase may not flash completely, and above 300°C hydrocarbon-free silicone oils can form silica-like deposits on ejector pins after continuous use. Ejector pin lubrication is programmed separately at 0.05–0.10 mL per pin bank per shift. The molded parts should be checked for silicone transfer if subsequent adhesive bonding or painting is specified; a surface energy test using dyne pens should remain above 34 mN/m after degreasing. In food-contact mold release operations, the final formulation must be evaluated under 21 CFR 178.3570 for incidental contact lubricants, and migration limits are set by the end-use food type.
Waterborne acrylic furniture topcoats applied by air-assisted airless spray receive RH-NB-8158 as a slip and anti-blocking additive at 0.05–0.15% on total formulation solids. The fluid is pre-diluted in propylene glycol monobutyl ether or mixed with a non-ionic surfactant before incorporation, because direct addition to the let-down phase can cause surface haze. Coating is applied at 80–120 g/m² wet film thickness, flashed at 25–30°C for 10–15 min, and force-dried at 50–60°C for 20–30 min. Slip improvement is measured as coefficient of friction according to ISO 8295; at 0.10% addition, the coefficient typically falls below 0.25, from an unmodified control above 0.45. Addition above 0.30% creates intercoat adhesion loss and crawling of a subsequent UV-curable sealer; cross-cut adhesion under ISO 2409 can drop from grade 0 to grade 3. Pigmented systems containing 30–35% TiO₂ by total weight should not receive the silicone before the grind phase, because grind temperatures above 55°C can destabilize the dispersion and reduce Hegman grind fineness below 5 µm. Blocking resistance is tested by ASTM D4946 on coated panels stacked for 24 hours at 40°C and 1 kg/cm²; the silicone fluid reduces interfacial blocking but does not replace wax matting agents. In two-component isocyanate-cured topcoats, the product must be checked in the polyol component before adding the hardener, because free silicone can reduce crosslink density, evaluated by solvent double rubs under ASTM D5402.
A twin-screw compounding line running PP/EPDM thermoplastic polyolefin can use RH-NB-8158 as an internal lubricant and filler dispersion aid when pellets are preblended with 0.5–1.0 wt% fluid in a low-speed drum tumbler for 2–3 min before twin-screw extrusion at L/D 40:1 and screw speed 350–500 rpm. Barrel temperature zones are set between 190°C and 220°C, with the die head held at 210–230°C; the silicone reduces melt viscosity and improves wetting of 20–30 wt% calcium carbonate or talc. Melt mass-flow rate measured by ISO 1133-1:2022 at 230°C/2.16 kg can increase by 15–25% at 0.5 wt% addition relative to the same compound without processing aid, while tensile strength tested by ISO 527-2 remains within 5% of the control. The critical threshold exists at 1.5 wt%: screw slippage appears as melt pressure drop greater than 1.0 MPa in the final zone, and the melt can become difficult to feed because the barrel wall film reduces frictional transport. Injection-molded plaques of 3.2 mm thickness produced with 80–100 t clamp force, mold temperature 40–60°C, and injection pressure 70–90 MPa show silicone migration over 48–72 h; this changes surface energy, measured as water contact angle rise from 78° to 92°. If bonding or painting follows, the surface requires plasma or corona treatment to restore adhesion. The fluid should not be combined with silane-grafted PP or metallic coupling agents without compatibility testing, because it may compete for reactive sites on treated mineral surfaces.
The following response pattern is representative for solvent-free silicone processing aids of this chemical class in PP/EPDM compounds and does not replace a batch-specific certificate for RH-NB-8158.
| Silicone addition rate | Melt mass-flow rate at 230°C/2.16 kg (ISO 1133-1:2022) | Tensile strength by ISO 527-2 | Observed processing condition |
|---|---|---|---|
| 0 wt% | Baseline | Baseline | Stable screw torque |
| 0.5 wt% | +15–25% vs baseline | ≤5% deviation | Lower melt pressure |
| 1.0 wt% | +25–35% vs baseline | ≤8% deviation | Mixed filler wetting |
| 1.5 wt% | Variable | Not recommended | Screw slippage, surface migration |
For solvent-free hair serum formulations, RH-NB-8158 is incorporated at 1.0–10.0% by weight into a low-viscosity dimethicone or phenyl trimethicone carrier. Where the product is positioned as a heat-protection additive, combing force is measured on a constant-rate tensile combing apparatus; a dose of 0.2 g per 10 g hair tress after shampooing can reduce combing force by 20–40% compared with an untreated damaged tress. The film does not eliminate thermal damage at repeated flat-iron exposure above 220°C, and differential scanning calorimetry of keratin fragments heated to 200°C shows the silicone moderates moisture loss rather than preventing protein denaturation. Leave-on formulations must satisfy cosmetic GMP under ISO 22716 and the safety assessment requirements of EU Regulation 1223/2009; if the silicone source is not cyclomethicone-free, volatile linear siloxanes must be monitored below relevant detection limits. In ethanol-based pump sprays above 25% ethanol by weight, a non-ionic emulsifier such as PEG-40 hydrogenated castor oil is used at a silicone-to-emulsifier ratio of 2:1 to 3:1 to maintain droplet stability. On fine unbleached hair, use above 5% can create visible greasiness and reduce volume, measured by tress cross-section image analysis over 24 h. The product should not be mixed with strong alkaline relaxers or thioglycolate waving lotions, because the hydrophobic film can shield the cuticle and produce uneven reduction patterns. For eye-area formulations, the formulator must confirm the final mixture under Annex III of EC 1223/2009.
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The No Solvent Multi-functional Silicone Oil RH-NB-8158 is a solvent-free polyorganosiloxane fluid supplied for industrial release, surface modification, and lubrication operations where solvent-carrier removal is undesirable. Unlike solvent-thinned dimethylsilicone oils, the product is formulated as a single-component liquid with no deliberate addition of aliphatic, aromatic, or oxygenated solvents. Its model code RH-NB-8158 designates a controlled-viscosity grade within the manufacturer’s solvent-free silicone series. The fluid is characterised by a combination of lubricity, film formation, and polar substrate affinity. Under routine incoming inspection, the material is tested against the analytical and specification framework set out in ISO and ASTM standards applicable to silicone fluids for industrial use. In addition to standard physical and compositional limits, batch release documents include non-volatile content, kinematic viscosity, density, and moisture values. The absence of solvent does not automatically confer food-contact or pharmaceutical acceptability; compliance must be confirmed against specific regulatory texts such as EU Regulation 10/2011, FDA 21 CFR 177.2600, or REACH restrictions relevant to cyclic siloxanes.
Incoming lots are sampled according to ISO 2859-1:1999 single sampling normal inspection, general inspection level II for routine physical properties. The certificate of analysis includes batch number, production date, and results for viscosity, density, non-volatile content, moisture, and appearance. Because RH-NB-8158 is marketed as solvent-free, residual solvent testing by headspace gas chromatography with flame ionisation detection is used to confirm that volatile organic compound contribution remains below the reporting threshold. The liquid does not contain alcohol or glycol ether co-solvents; infrared spectra therefore lack the characteristic O–H absorption bands of many semi-synthetic release fluids. This analytical fingerprint supports product substitution on solvent-restricted sites.
Volatile organic compound content is not the same as solvent content. Some low-molecular-weight siloxanes can be volatile at bake temperatures, even when no solvent is added. Therefore, compliance with automotive VDA 278 thermodesorption limits may be relevant when silicone release agents are used inside vehicle cabins. Published data for RH-NB-8158 under VDA 278 is limited, but product-class values indicate the main thermal desorbables are cyclic siloxanes below 0.1 %.
The specification set for RH-NB-8158 typically includes the following release targets. Values are batch-dependent and should be confirmed against the certificate of analysis before setting pump speeds, spray pressures, or oven residence times.
| Property | Test method | Release specification |
|---|---|---|
| Appearance | Visual inspection against clear standard | Clear, colourless to pale yellow viscous liquid |
| Kinematic viscosity at 25 °C | ISO 3104:2023 | 350–600 mm²/s |
| Density at 25 °C | ASTM D4052-22 | 0.965–1.005 g/cm³ |
| Refractive index at 25 °C | ASTM D1218-21 | 1.403–1.407 |
| Flash point, Cleveland open cup | ISO 2592:2017 | ≥ 250 °C |
| Non-volatile content, 150 °C/30 min | ISO 3251:2019 | ≥ 98.5 % |
| Water content, coulometric Karl Fischer | ISO 760:1978 | ≤ 0.05 % |
| Pour point | ISO 3016:2019 | ≤ −20 °C |
| Acid number | ISO 6618:2017 | ≤ 0.05 mg KOH/g |
| Cyclic siloxanes D4–D6 | Solvent extraction/GC-MS per REACH Annex XVII | < 0.10 % total |
Viscosity specification is intentionally broad because the product is blended to a target of 450 mm²/s at 25 °C to accommodate variations in downstream pumping equipment. Batches showing viscosity near the lower limit are preferred for low-pressure spray systems; batches near the upper limit are suitable for padder and roll applicators where film thickness retention is more important than atomisation. Users should request the actual certificate of analysis before setting pump speeds and nozzle pressures. Difference between each batch and the previous lot should be evaluated because silicone fluid viscosity changes logarithmically with temperature, and small temperature differences in the application area can produce measurable flow rate changes.
On continuous coil-coating and mould-release operations, RH-NB-8158 is supplied to application heads without solvent dilution. The fluid is transferred from drum storage by stainless steel gear pumps with internal clearances sized for a viscosity of 350 mm²/s to 600 mm²/s at 25 °C. Pump delivery lines are jacketed at 25 °C to 35 °C; line pressures above 40 bar are not required for airless spray nozzles with orifice diameters between 0.15 mm and 0.30 mm. In open-trough textile padding, neat silicone oil forms a continuous film on woven or nonwoven substrates when application levels are controlled by load-cell nip pressure and line speed. Excess film thickness causes downstream slipping on calendar rollers and reduces print adhesion. A production-scale stenter with fabric width 2400 mm operating at 40 m/min has been used to validate deposition uniformity by gravimetric extraction. Published data for this specific configuration is limited to manufacturer technical reports rather than independent multi-laboratory studies.
Because the product is solvent-free, its drying or film-forming profile depends on surface area and temperature rather than solvent evaporation. In closed moulding operations, film formation is accelerated by mould temperatures above 60 °C. At mould surface temperatures below 30 °C, film formation remains slower than solvent-borne fluids, and ejection demould force may rise during initial cycles. Operators should validate the first-shot demould force data against a solvent-borne reference when changing products. The absence of solvent vapours, however, permits work zones to remain below common VOC action levels and reduces the need for explosion-proof electrical classification under many plant risk assessments, provided local fire-load assessments confirm the flash point and auto-ignition limits of the fluid.
In textile finishing padder cabinets, RH-NB-8158 is applied neat through low-pressure manifold systems at add-on levels controlled by nip pressure and line speed. Production-scale experience on stenter frames with fabric widths above 2200 mm has shown that bath stability is maintained only when the silicone is pre-emulsified with nonionic surfactants having an HLB of 10 to 13 when water-dilutable processing is required. Neat application avoids hydrolysis of the organofunctional groups. Because the product lacks solvent, drying capacity becomes the critical line speed constraint rather than solvent extraction rate.
In melt processing of polyolefins and engineering thermoplastics, RH-NB-8158 is injected as an external surface lubricant or as a low-level process aid. On a corotating twin-screw extruder with L/D 40:1 and screw diameter 27 mm, addition rates of 0.1 wt% to 0.5 wt% have been used to control die-plate fouling during strand pelletizing of glass-filled polypropylene. The liquid is metered through a heated mass flow controller into the downstream side-stuffer port; side-stuffer temperature is maintained at 30 °C to 45 °C. No solvent is present to degrade melt pressure or create vent-port flooding. Torque reduction measured at the extruder drive is reported in the range of 2 % to 7 % relative to unlubricated glass-filled polypropylene, but batch-to-batch variance in filler particle size distribution requires confirmation runs. These values are process-specific and do not constitute a guaranteed performance specification.
In injection moulding of thermoplastic polyurethane and soft-touch grips, external mould release application of RH-NB-8158 is performed with pneumatic spray every 8 to 20 cycles depending on part geometry and tool texture. Automated spray systems with 0.2 mm nozzle orifices and atomising air pressures of 2 bar to 4 bar provide adequate coverage on vertical walls, but sharp corners and deep ribs may require increased dwell time because the fluid does not flash off like solvent-based release films. Tool temperatures below 15 °C produce heavier film accumulation and stain. On textured mould surfaces, repeated application increases mould release ease but also transfers silicone to the moulded part surface. When downstream painting or bonding is required, a plasma or corona pre-treatment step is normally used before coating; the suitability of this step must be validated against the coating supplier’s adhesion specifications.
RH-NB-8158 differs from solvent-borne polydimethylsiloxane release agents in its absence of solvent, its higher neat film deposition, and its lower evaporation mass loss during high-temperature moulding. A comparative performance assessment on a laboratory injection moulding tool using PA66 at 260 °C showed that the solvent-free product maintained a lower demould force for 15 consecutive releases, whereas the solvent-borne reference required reapplication after 8 releases. However, this result is drawn from a single tool geometry and may not transfer to polished versus spark-eroded surfaces. Solvent-borne systems generate film thinning through solvent evaporation, which can produce more uniform thin layers on large flat panels; RH-NB-8158 relies on mechanical atomisation and droplet coalescence rather than solvent carrier mobility.
Compared with amino-functional silicone fluids, RH-NB-8158 shows different adsorption and transfer behaviour. Amino-functional fluids produce strong chemical adsorption on anodised aluminium and ferrous moulds, often yielding higher release but higher post-mould surface contamination and poorer paint adhesion. The multi-functional grade exhibits intermediate adsorption due to polar group density; it is less aggressive than amino-functional fluids on alkali-sensitive substrates and offers improved water-based coating wetting after cleaning. On glass and ceramic substrates, adhesion may be lower than amino-functional oils; therefore, release on ceramic fillers in rubber moulding must be tested. Differences in thermal yellowing are also observed: amino-functional fluids can develop colour at prolonged temperatures above 150 °C, while RH-NB-8158 remains within a Gardner colour increase of < 1 after 24 h at 150 °C under standard laboratory ageing. This statement is based on product-class behaviour; independent multi-lot data for RH-NB-8158 are limited.
| Comparison parameter | RH-NB-8158 | Solvent-borne PDMS | Amino-functional silicone oil |
|---|---|---|---|
| Solvent content | Not detectable by headspace GC; reporting limit 0.1 % | Commonly 5 % to 30 % volatile carrier | Solvent-free or emulsion; variable |
| Application viscosity at 25 °C | 350–600 mm²/s | Often 50–300 mm²/s after solvent dilution | 200–800 mm²/s |
| Film formation mechanism | Coalescence of neat droplets; heat-assisted film build | Solvent evaporation followed by PDMS film deposition | Adsorption and crosslinking on substrate |
| Paint adhesion after release | Moderate; requires cleaning or plasma treatment | Moderate; solvent residues can disturb adhesion | Often poor without aggressive cleaning |
| Thermal colour stability at 150 °C/24 h | Gardner change < 1 | Gardner change < 1 if solvent is removed | Can exceed 2 |
| Reapplication interval in PA66 injection moulding | 15 releases, single-tool test | 8 releases, single-tool test | 10–20 releases depending on tool surface |
The product’s multi-functional character does not equate to a reactive crosslinker. Unlike low-viscosity reactive silicone crosslinkers used in platinum-catalysed addition-cure systems, RH-NB-8158 is not supplied as a cure component. It may contain reactive organofunctional groups that improve adsorption, but these groups are present at controlled levels that do not cause bulk gelation under normal storage. It must not be substituted for a silicone base polymer or crosslinker in two-part RTV systems without full formulation redesign.
In rubber calendering and moulding, RH-NB-8158 is used as a release agent where silicone-containing sprays with solvent can weaken uncured stock edges. The solvent-free product reduces adhesion between uncured rubber and mill rolls when applied at 0.2 g/m² to 0.6 g/m² using a wick or spray system. On open mill rolls operating at 60 °C to 90 °C, the fluid forms a boundary film that lowers compound sticking without severely reducing building tack. For applications requiring later splicing, the film must be removed or replaced by a controlled tackifier layer because the silicone film can interfere with green strength. In transfer moulding of EPDM, established production reports indicate that a lower reapplication frequency is possible relative to stearate release systems when a semi-permanent silicone film is desired, but continuous recording of demould force is required to avoid overcuring of edge sections.
For metal die-casting release, RH-NB-8158 is not a drop-in replacement for water-based high-temperature graphite or ester-based die lubricants. It may be used as a supplementary surface conditioner at highly polished areas where soldering or galling initiates, but it does not provide the cooling and thermal barrier function of water-based die sprays. Die surface temperatures above 350 °C can cause rapid oxidation and decomposition of the silicone film; therefore, its use in aluminium high-pressure die casting should be limited to zones with surface temperatures below 250 °C. Published production-line data for this specific application are limited.
Unopened drums remain within specification for a shelf life of 12 months when stored at 5 °C to 40 °C. Liquid temperature below 5 °C can increase viscosity; material should be returned to 20 °C to 30 °C before pumping. Opened containers should be blanketed with dry nitrogen if relative humidity exceeds 60 %, since moisture ingress can initiate slow hydrolysis of reactive organofunctional groups and create haze or gel-like particles. The product should not be blended with primary or secondary amine additives, organotin catalysts used in condensation-cure silicones, or strong acidic fluids without compatibility testing. Premature condensation or viscosity drift can occur when such combinations are exposed to heat.
Equipment cleaning after RH-NB-8158 use requires solvent extraction with low-VOC aliphatic hydrocarbon cleaners or alkaline surfactant systems, followed by a water rinse. Cured silicone residues on hot tools may require plasma etching, sodium bicarbonate grit blasting, or alkaline immersion. If transfer to downstream painted or bonded surfaces is not acceptable, installation of parts-washing tanks with ultrasonic agitation at 40 kHz to 60 kHz is common. The cleaning chemistry must not rely solely on solvent dissolution because the silicone film can be mechanically persistent.
For regulatory compliance, the product is handled as a silicone fluid. Standard safety data sheet sections for fire protection, accidental release, and disposal should be followed. The absence of solvent reduces volatile organic compound emissions during application, but venting may still be required if thermal decomposition products are generated at process temperatures above 250 °C. At sustained temperatures above 200 °C in closed vessels, the potential build-up of low-molecular-weight siloxanes should be evaluated using workplace air monitoring for D4/D5/D6.
RH-NB-8158 should be specified only after a production-scale trial on the target substrate, because silicone release agents are highly dependent on mould material, texture, polymer formulation, and post-treatment requirements. No laboratory test panel or small-scale data set can fully represent demould force aging on complex tools. Users must validate that the selected application rate, cleaning cycle, and pre-painting adhesion process meet part specifications under normal production run lengths. The product is not recommended for use in oxygen-rich high-pressure systems above 150 °C where silicone fluid ignition with pure oxygen could occur. Similarly, contact with strong oxidisers should be avoided. Silicone residues may interfere with adhesive bonding and welding operations; transfer from release agent to part surfaces must be controlled by application rate and post-mould cleaning, not by solvent evaporation alone.
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