Square Intumesent Blocks -

MADE TO ORDER 5-7 WORKING DAYS

These intumescent Intumescent blocks have been specially developed to enable natural ventilation through fire-resistant walls or doors. Rated at temperatures of 100 °C or higher, the grilles expand and seal the ventilation openings, blocking the passage of fire, smoke and hot gases. The ventilation grilles come with high fire resistance classes and are available in a variety of sizes for meeting different construction requirements. Rated for 120 minutes except for 600mm models which are rated for 60 minutes.