ThreeBond 1211 one-component room temperature curing white silicone rubber liquid gasket
Product Overview
ThreeBond 1211 is a one-component white liquid gasket (silicone sealant) based on silicone. The product cures spontaneously upon exposure to moisture in the air without the need for additional curing agents, accelerators or heat.. Curing can begin in about 40 minutes after application at 25°C, and the bonding strength will gradually increase as the reaction proceeds.。
The white rubber-like elastomer formed after curing has excellent heat resistance, cold resistance, weather resistance and excellent electrical insulation properties, and can maintain stable sealing and mechanical properties over a wide temperature range for a long time.. The product adopts a solvent-free formula with extremely low linear shrinkage (only 0.5%) and good fluidity (Sag). It is very suitable for flange sealing and self-leveling gap filling conditions with relatively large gaps.。
Core advantages and features
Excellent temperature and weather resistance:After curing, it has outstanding high and low temperature resistance, can withstand harsh environments for a long time, and maintains its original physical elasticity and sealing effect under wide temperature conditions.。
Low shrinkage and solvent-free system:Adopting a 100% solvent-free formula, there is almost no volume collapse during the curing process and the linear shrinkage is only0.5%。
Good leveling (Sag):It has certain fluidity and can self-level, penetrate and fill micropores and relatively large joint gaps on the processed surface.。
Strong pressure resistance and leakage prevention ability:Normal temperature flange pressure resistance up to90 kg/cm², 80℃ and 150℃ withstand voltage up to95 kg/cm²; After alternating hot and cold cycles, the pressure resistance can reach110 kg/cm²。
Excellent electrical insulation properties:It has extremely high insulation resistance and dielectric properties, and can double as a moisture-proof insulating package for electrical components after complete curing.。
Good media tolerance:Demonstrates good chemical resistance to water, antifreeze, engine oil, gear oil and other industrial oils。
Basic physical properties and technical specifications
| Inspection items | Technical parameters | Test Standards/Remarks PDF |
| base ingredients | Silicone resin (Silicone based) | One-component moisture cure |
| Appearance before curing | white fluid | Liquid (Sag) |
| Specific gravity (25℃) | 1.01 | — |
| viscosity | 70 Pa·s | Moderate flow and filling |
| Tack-free time | 20 ~ 30 minutes | 25℃，50% RH |
| Completely solidified | Converts to elastomer in 15 ~ 16 hours | Maximum bond strength takes 3 days |
| Appearance after curing | white rubber elastomer | — |
| Hardness (JIS) | 5 Shore A | Soft high resilience elastomer |
| tensile strength | 10 kg/cm² | — |
| Elongation at break | 230% | Good flexibility and vibration absorption |
| linear shrinkage | 0.5% | Very low shrinkage |
| Shear strength (aluminum plate) | 10 kg/cm² | Al Plates |
| Common packaging specifications | 50g (support), 100g (support), 17kg (bucket) | Suitable for maintenance proofing and batch gluing |
| Storage shelf life | 12 months | Unopened, store in a cool and dry place at 10 ~ 25℃ |
Technical tolerance and experimental data
1. Flange pressure resistance (according to JIS-K-6820 standard)
Normal temperature and pressure resistance: 90 kg/cm²
80℃ pressure resistance: 95 kg/cm²
150℃ pressure resistance: 95 kg/cm²
Pressure resistance after hot and cold cycles: 110 kg/cm²
2. Relationship between clearance and pressure resistance (turbine oil medium, 120℃)
0.10 mm gap:Withstand pressure up to0.7 kg/cm²
0.25 mm gap:Withstand pressure up to0.4 kg/cm²
0.50 mm gap:Withstand pressure up to0.1 kg/cm²
3. Resistance to chemical reagents (impregnation mass change rate)
water: -0.5%
Anti-freeze: -0.35%
Gear Oil: +2.10%
Engine Oil: +5.0%
Gasoline: -20.2%
Typical application areas
Mechanical mating surface seal:Sealing of joint surfaces, end covers, oil pans and large gaps in boxes of automobiles, motorcycles and general electromechanical products。
Gap leveling and filling:It has certain fluidity and is suitable for sealing operations that require self-leveling to penetrate into fine gaps or rough flange surfaces.。
Electronic and electrical insulation seals:Electrical connectors, instrument casings, moisture-proof insulating encapsulation and shock-proof filling (complete electrical insulation properties usually develop after 7 days of glue application)。
Weathering and Pipe Sealing:Elastic waterproof sealing of outdoor weather-resistant equipment covers, heat exchange equipment and industrial pipeline joints。
Construction methods and usage precautions
Glue nozzle cutting:According to the actual glue output width and construction point, cut a bevel at the appropriate position of the matching glue nozzle for installation and use.。
Substrate cleaning:Before coating, ensure that the joint surface is dry and free of water, grease and dust impurities.。
Curing cycle:The glue solidifies from the surface inward when exposed to air moisture; when the glue layer is thicker, the curing cycle is correspondingly extended.. It takes 20 to 30 minutes to tack dry and turn into elastomer in 15 to 16 hours. The best bonding strength is achieved after 3 days and the insulation performance is best after 7 days.。
Save method:This product reacts easily with moisture in the air. Please remove the nozzle after use.Squeeze out the remaining air in the tube and quickly tighten the cap., store in a cool and dry place at 10 ~ 25°C in a sealed manner (the residual glue in the nozzle is easy to pull out and clean after solidification)。
