TRUFAST® Metal Insulation Plates are used to mechanically attach insulation, coverboards and BUR base sheets to the substrate. The plate’s circular design and reinforcing ribs provide exceptional strength to resist wind uplift forces. TRUFAST Metal Insulation Plates are made of Galvalume coated steel for excellent corrosion protection that meet the requirements of ASTM D 6294, FM 4470 and DIN 50018. TRUFAST 3” Metal Insulation Plate has a flat bottom and is used to attach roof coverboards, insulation, and BUR base sheets to the substrate.