Everbuild heatmate – high temperature silicone

Everbuild Heatmate silicone is a high modulus, reactive curing sealant built specifically for applications where standard silicone would simply give up. Rated from -50°C all the way to 300°C, this is the product you reach for when sealing anything that gets genuinely hot — and stays that way. The Everbuild Heatmate silicone range is trusted across domestic and industrial settings where heat resistance is not optional.

Standard silicones are fine for bathrooms and windows. Put them near a flue, a wood-burning stove, or an industrial oven and you will find out their limits pretty quickly. Heatmate is formulated for exactly those conditions. It maintains its seal and flexibility under sustained high temperatures, which is why it gets used across heating trades, installation engineers, and anyone working with metal chimneys or combustion appliances.

It bonds well to non-porous surfaces, which covers most of what you are likely to be sealing in these environments: steel, cast iron, ceramic, and similar materials. The seal is waterproof and low in dirt pick-up, so it stays looking reasonable even in visible locations. Tack-free in around an hour, which is a sensible working time — long enough to get the joint sorted without spending the afternoon waiting for it to skin over.

Where Everbuild Heatmate Silicone Gets Used

The red variant is useful on site for easy visual identification — useful if you are working in a boiler room or plant room and need to distinguish your high-temp sealant from ordinary silicone. It is also available in black for a neater finish on dark metalwork or where aesthetics matter slightly more.

Gasket Sealing and Industrial Applications

Beyond the domestic setting, Heatmate is widely used as a gasket sealant in industrial equipment, process heating, and manufacturing environments. Anywhere a flexible, heat-resistant seal is needed between metal components, this product does the job without the complexity of two-part systems or specialist compounds. Simple to apply, reliable under heat, and stocked by a name that UK tradespeople have dealt with for years.