Geocel High Temperature Silicone
Geocel High Temperature Silicone contains a premium grade silicone formulation, powered by Dow technology. It is a professional grade high temperature resistant silicone sealant designed for sealing and bonding in applications exposed to elevated heat. Suitable for use on non-porous surfaces, it withstands temperatures up to 300°C, making it ideal for gas flues, chimneys, stoves, boilers, ovens and hobs. This premium grade silicone offers excellent adhesion, permanent flexibility, UV resistance and long-lasting durability for both internal and external applications.
Product info
Benefits
- For high-temperature applications – Designed for use where standard sealants would fail.
- Withstands up to 300°C – Suitable for extreme heat environments like flues and ovens.
- Ideal for flues, chimneys, stoves, boilers & hobs – Provides reliable sealing in specialist applications.
- Permanently flexible – Maintains seal integrity even with heat expansion.
- Internal & external use – Suitable for both indoor and outdoor projects.
- UV resistant – Retains performance when exposed to sunlight.
- Highly durable – Long service life even in harsh conditions.
- Not fire-rated – Suitable for heat resistance but not for fire protection applications.
- Excellent adhesion to non-porous surfaces – Ensures a secure bond on smooth materials.
- Powered by Dow technology - contains a premium grade silicone formulation.
Colours
Black
Technical Information
| Where to use | Interior/Exterior |
| Paintable | No |
| Skin Overtime | 20 min |
| Time to cure | 24 hour |
| Time to cure disclaimer | 3mm per 24 hours |
| Container Type | Cartridge |
| Sizes | 300 ml |
| Application method | Sealant Gun and Cartridge |
Application
Surface Preparation
Ensure that surfaces to be sealed are clean, dry, sound and free from frost. Clean all joints of release agents, water repellents, dust, dirt, old sealants and other contaminants which could impair adhesion. Surfaces should be cleaned and degreased by wiping with a suitable solvent (e.g. DOWSIL™ R-40 /Universal Cleaner or an alcohol based solvent) using a clean lint free cloth.
Application Instructions
Remove nozzle and cut off end of the cartridge. Replace nozzle and cut tip to required width. Place the cartridge in a cartridge gun and apply material into the required joint.
Clean up
Cleanup using a suitable solvent or use Geocel Universal wipes.
Quantity Estimator
Enter joint dimensions below to estimate number of cartridges required
You will require x cartridge