Description
CHT QSil 555 White Potting Silicone is an addition-cure material for potting and encapsulation work that needs a semi-thixotropic flow profile and long pot life. The two-component silicone mixes at 10:1 by weight and cures with heat.
QSil 555 Benefits
- Long pot life gives operators more time for mixing, setup, and dispensing.
- Semi-thixotropic, shear-thinning flow helps control placement in housings and assemblies.
- White cured appearance supports visual contrast in filled parts and inspection areas.
- 10:1 mix ratio suits both hand mixing and controlled dispensing processes.
- 100 percent solids formulation is listed by CHT for this material.
This compound is a good fit when a potting material must stay controlled during placement instead of running freely through every opening. The mixed viscosity is high enough for parts that need body and edge control, while the heat-cure schedule supports production planning once the assembly is filled. Confirm thermal exposure, dispensing equipment, and substrate compatibility before releasing a process to the floor.
Common Applications for QSil 555
- Electronic potting where white silicone is preferred
- Encapsulation of assemblies that need controlled flow
- Manual or machine-dispensed potting with a 10:1 system
- Modules and housings that can be heat cured after filling
- Applications that benefit from long working time before cure
Compatible Materials
- Electronic assemblies and components
- Plastic and metal housings confirmed by shop testing
- Heat-cure production fixtures
- Meter-mix equipment configured for 10:1 materials
QSil 555 Technical Specifications
| Property | Value |
|---|---|
| Color | White |
| Cure Type | Addition cure |
| RTV or Heat Cure | Heat cure |
| Mix Ratio by Weight | 10:1 |
| Gel Time at 25 C | >72 hr |
| Hardness | 50 Shore A |
| Rheology | Shear thinning |
| Viscosity Mixed | 65,000 cP |
| Working Temperature Range | -55 C to 204 C |
Packaging and Ordering
For similar materials, browse encapsulants and potting compounds. Manufacturer information is available from CHT Group.
Need Help?
If you need help choosing a heat-cure potting compound, mix ratio, or dispensing setup, call (800) 220-1966 or email [email protected].







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