Product overview
MOMENTIVE / GE TOSHIBA TSE3941 One-component dealcoholized flame-retardant and thermally conductive silicone rubber sealant
TSE3941 is a one-component, fast-curing white semi-flowable flame-retardant silicone rubber adhesive. This product absorbs moisture in the air and solidifies into elastic, flame-retardant silicone rubber.TSE3941 has excellent insulation, high and low temperature resistance, and non-corrosive contact characteristics with a variety of metals (including copper), and the curing process releases trace amounts of alcohol molecules, low odor, can achieve strong bonding to most substrates without primer, specially designed for electronic and electrical assembly environments with strict flame-retardant and heat dissipation requirements.
Core technical features and advantages
Excellent flame-retardant properties: conform to UL94 V-1 Flame-retardant grade standard (File No: E56745), providing a high-level electrical fire safety barrier.
No corrosion of metal (dealcoholization type system): Complies with MIL-A-46146B corrosion test standards, releases trace amounts of alcohol upon curing, and is non-corrosive to copper, brass and other corrosive metals and electronic components.
Quick drying, efficient construction: To be dry to the touch at 23°C, only about 5 minutes, quickly finalize the shape and improve the assembly rhythm of the production line.
Good thermal conductivity and insulation properties: The thermal conductivity reaches 0.83 W/m·K, dielectric strength reaches 22 kV/mm, effectively assists in heat dissipation of heating components and provides high electrical strength.
Excellent temperature and weather resistance: Available at -55°C to 200°C Long-term flexibility under extreme temperature differences, with excellent UV resistance, ozone resistance and chemical resistance.
No primer required for bonding: Excellent adhesion to aluminum, stainless steel, copper, iron and other metals as well as engineering plastics (ABS, PBT, PPS, PVC, PC, etc.), glass, ceramics and other substrates.
Typical application areas
High voltage electrical and power modules: Flame-retardant insulation fixation of high-voltage components, transformers, power converters and capacitor components.
Precision seam sealing of electronic components: Shockproof fixation of various circuit board components, sealing protection of connectors and cable pins.
Communication and waterproof industrial equipment: Waterproof and flame-retardant sealing of communication base stations, outdoor instruments, industrial sensors and electrical control boxes.
Technical physical parameters (TDS data)
Physical properties before curing:
| Performance indicators | Test conditions/specifications | Parameter value |
| Appearance | Visually | Semi-flowable paste, White |
| Curing system | — | One-component moisture curing · dealcoholization type (low odor) |
| Tack-free Time | 23°C | 5 minutes |
| Metal corrosiveness | MIL-A-46146B test | No corrosion (None) |
Physical properties after curing (23°C / 50% RH, cured for 7 days):
| Performance indicators | Test Standard/Unit | Parameter value |
| solidified form | Visually | elastic rubber body |
| proportion | 23°C | 1.65 |
| hardness | Type A (Shore A) | 65 |
| tensile strength | MPa {kgf/cm²} | 2.9 {30} |
| Elongation at break | % | 100% |
| Shear bond strength | Aluminum plate shear test MPa {kgf/cm²} | 1.4 {14} |
| thermal conductivity | W/m·K {cal/cm·s·°C} | 0.83 {2.0×10⁻³} |
| Volume resistivity | MΩ·m {Ω·cm} | 4×10⁶ {4×10¹⁴} |
| Dielectric strength | kV/mm | 22 |
| Dielectric constant | 60Hz | 4.0 |
| dielectric loss tangent | 60Hz | 0.04 |
| Working temperature range | Continuous temperature resistance | -55 °C - 200 °C |
User Guide and Construction Instructions
Surface cleaning: Make sure the surface of the bonding substrate is clean, dry and free of dust, grease and moisture.
Adhesive assembly: Directly squeeze out the adhesive and apply it to the bonding and sealing parts. TSE3941 has appropriate semi-fluidity and can well wet the gaps between components.
curing reaction: The product will gradually solidify from the surface to the inside after exposure to moisture in the air. It is recommended to fully cure in an environment of 23°C and 50% RH to obtain the best physical and electrical properties.
Packaging specifications and storage
Original packaging specifications: 150g/piece (packed in aluminum tube, 20 pieces/box); 333ml/piece (packed in plastic cartridge, 50 pieces/box).
Storage conditions: Store in a cool, dry warehouse away from direct sunlight.Please try to use it up at once after opening. The unused portion should be sealed tightly at the mouth of the tube immediately.
