Window and Door fittings - Marvon seals for fireproof doors

Below we present you Marvon seal for fireproof doors. These are products that enjoy great popularity primarily because of their use. They are ideal as effective protection of fire protection frames (metal, wood, aluminum), doors from the elevator or curtain walls. These products are characterized by a significant increase in volume under the effect of increased temperature. When it reaches 450 degrees Celsius, the gaskets form a stable, slightly elastic, porous foam. If you care about high secur