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ThreeBond 1207B one-component room temperature curing silicone rubber liquid gasket (black)
Product Overview
ThreeBond 1207B is a one-component black liquid gasket (silicone sealant) based on silicone rubber.. After the product comes into contact with moisture in the air, it can spontaneously react and solidify at room temperature into a silicone rubber solid with excellent elasticity, without the need to add additional curing agents, accelerators or heat treatment.。
The elastomer formed after curing has extremely high cold resistance, heat resistance and electrical insulation properties, and can be used in-60℃ to +250℃Long-term stable mechanical properties and sealing effect under wide temperature range conditions. The solvent-free formula has extremely low shrinkage and no flow characteristics, making it ideal for filling and sealing flanges and mechanical joints with large gaps.。
Core advantages and features
Ultra-wide temperature range (-60℃ ~ +250℃):It has excellent high and low temperature resistance. It does not harden or crack under severe cold or high engine temperature conditions, and its performance is always stable.。
Moisture room temperature self-curing:One-component system, curing starts when exposed to air humidity, easy and efficient to operate。
Solvent-free and low shrinkage:100% solvent-free formula, with minimal curing shrinkage and non-sag properties, making it ideal for vertical surface construction and large gap sealing。
Excellent pressure resistance:The pressure resistance at normal temperature can reach90 kg/cm², the withstand voltage remains at 80℃ and 150℃ high temperature environment.95 kg/cm²; After being impacted by hot and cold cycles, the pressure resistance can reach even higher110 kg/cm²。
Excellent chemical media resistance:It has good chemical resistance to common media in the automotive industry such as engine oil, water, antifreeze (coolant) and gasoline.。
Reliable electrical insulation performance:It has excellent insulation properties and can be used for the protection and packaging of industrial equipment.。
Basic physical properties and technical parameters
| Inspection items | Technical parameters | Test conditions / remarks PDF |
| base material | One-component silicone rubber (Silicone Rubber) | Moisture curing type |
| Appearance before curing | Black paste liquid | Non-sag |
| Specific gravity (25℃) | 1.01 | — |
| Appearance after curing | black rubber elastomer | — |
| Hardness (JIS) | 30 Shore A | Has good flexibility and resilience |
| tensile strength | 15 kg/cm² | — |
| Elongation at break | 425% | Excellent vibration resistance tensile elongation |
| linear shrinkage | 9.0% | — |
| Temperature resistance range | -60℃ ~ +250℃ | Wide weather and heat resistant |
| Common packaging specifications | 100g (support), 333cc (cartridge), 17kg (barrel) | Supports automatic gluing for proofing and production lines |
| Storage shelf life | 12 months | Unopened, store in a cool and dry place at 10 ~ 25℃ |
Technical performance data
1. Flange pressure resistance test
Normal temperature and pressure resistance: 90 kg/cm²
80℃ high temperature pressure resistance: 95 kg/cm²
150℃ high temperature pressure resistance: 95 kg/cm²
After alternating hot and cold cycles: 110 kg/cm²
2. Resistance to chemical reagents (impregnation mass change rate)
water:Only -0.6%
Anti-freeze:Only -1.0%
Engine Oil:Only -6.0%
Gasoline: +5.0%
Typical application areas
Car and motorcycle engine assemblies:Automobile oil pan, water pump joint surface, timing chain cover, thermostat housing, camshaft cover and gearbox end cover seal。
Flange sealing for large gap conditions:Various industrial flange seals with large casting surface and machining tolerances or wide joint gaps。
Temperature-resistant piping and equipment assembly:Industrial hot and cold circulation pipelines, high temperature chassis casings, HVAC heat exchange equipment flange connection surfaces。
Construction methods and usage precautions
Surface cleaning:Before gluing, the oil, moisture, dust and residual glue from the old sealing gasket must be completely removed from the joint surface, and the surface must be kept dry.。
Apply glue evenly:Apply the glue evenly and continuously to the joint parts. This product will not sag and supports vertical or upward coating.。
Material pit avoidance:This product pairsCopper and copper alloys have a tendency to corrode, please avoid using it directly on the copper substrate contact surface;Cannot be used for tap water or domestic hot water drinking water pipes;Not for use in medical implants。
Electrical contact description:This product is an insulator and must not be directly applied to electrical conductive contacts.。
Storage environment:After use, please tighten the tube cap/sealing tube mouth immediately and store it in a dark, low-humidity and ventilated place at 10 ~ 25°C.。
