Ceresit CS 38 is a one-component, high-temperature sealant resistant to direct contact with fire and temperature fluctuations up to +1200 C (permanent up to +1500 C). It has very good adhesion to surfaces such as concrete, mortars and cement plasters, bricks (also refractory), metal, glass, steel (also galvanized), anodized aluminum. It is intended for: repairing cracks in furnaces, sealing in elements exposed directly to fire (e.g. fireplaces, stoves, boilers, grills) or high temperature (e.g. exhaust pipes, chimney flues).

Technical data:
- base: sodium silicate,
- density: approx. 1.80 g / ml,
- black colour,
- application temperature: from +10 C to +35 C,
- temperature resistance: up to + 1200 C, short duration +1500 C.