INTERDENS® · Intumescent strips

Interdens 5, 15 and 36 are intumescent materials based on ammonium phosphate that make wood and wood-based materials more fire-resistant. When exposed to heat, Interdens 5, 15 and 36 begin to expand at temperatures of around 150 °C, with a second phase of expansion beginning at around 300 °C. This two-phase reaction process increases the level of fire protection significantly. The foam produced forms a protective layer of thermal insulation that hermetically seals joints and gaps and prevents the passage of flames, smoke and hot gases. The protective layer adapts perfectly to gaps and effectively protects against the spread of fire. Interdens is available in the form of strips and seals.