Heat-resistant sealants

Heat resistant

— an elastic or mineralized compound that maintains joint seal integrity under intense heating and cooling, protecting the node from smoke, moisture, and soot. In everyday life and service, two types are commonly used: heat-resistant RTV silicone for sealing where flexibility and thermal expansion compensation are important (oven doors, glass in stove doors, cooktops, flanges, and covers in engine compartments without direct flame), and high-temperature silicate/"stove" compositions for areas with extreme heat and contact with fire (chimney section joints, cast iron plates, firebox joints), which become rigid after curing. Unlike sanitary and universal sealants, heat-resistant ones do not degrade or yellow from temperature, but they need to be chosen by temperature class and base: silicone is not placed in the fire, while silicate requires a mineral base and tolerates less deformation; this achieves long-lasting, safe sealing in kitchens, boiler rooms, fireplaces, and stoves.