is are durable, light weight, semi-rigid and strong. bituminous protection boards, for shielding waterproofing membrane from site damage or puncture by back- filling material.
is are manufactured from selected fine aggregates bound in oxidized asphalt, and then encased between two layers of asphalt saturated glass fiber/ composite mat, to form a semi-rigid, dense and strong board with high compressive strength capable of bearing typical foundation pressures.