EVERBUILD High Temperature Silicone Sealant is a premium, acetoxy cure silicone specially formulated for applications exposed to extreme heat. It remains permanently flexible and adheres well to most non-porous materials including glass, metal, and ceramics. Suitable for sealing and bonding in areas with continuous temperatures up to 250°C and intermittent exposure up to 300°C, this sealant is ideal for use in high-heat environments such as ovens, flues, boilers, and industrial sealing.
High heat resistance – up to 300°C (intermittent)
Permanently flexible with excellent adhesion
UV and weather-resistant
Excellent bonding on metal, glass, and ceramics
Quick curing with low shrinkage
One-component, easy to apply
Type: Acetoxy silicone
Colour: Red/Black
Packaging: 310ml cartridge
Skin Time: Approx. 5–10 minutes at 20°C
Full Cure: ~2–3mm per 24 hours
Temperature Resistance:
Continuous: up to 250°C
Intermittent: up to 300°C
Movement Capability: ±20%
Application Temperature: +5°C to +40°C
Service Temperature: -50°C to +300°C
Shelf Life: 12 months (unopened, cool/dry conditions)
Sealing around oven doors and flues
Heating appliances and ductwork
Industrial ovens and boilers
Chimney and stove flue sealing
Engine and machinery sealing applications
Metal-to-metal or metal-to-glass bonding in high-heat zones
Prepare Surfaces: Ensure surfaces are dry, clean, and free of dust, oil, and grease.
Apply the Sealant: Use a standard sealant gun. Cut nozzle to desired bead size and apply smoothly.
Tooling: Finish within 5 minutes with a wet tool or spatula.
Cure Time: Allow at least 24 hours before exposing to high temperatures. Full cure requires 24–72 hours depending on bead size.
Clean-Up: Remove uncured sealant with white spirit or Everbuild Wonder Wipes.