Products / Petersen PAC-CLAD PAC-Shield Coated Glass

Rigid roof insulation board with a closed-cell polyisocyanurate foam core faced on both sides with coated glass facers (CGF), one light and one dark, to let the installer control adhesive flash-off time in fully adhered systems. It is made in 4 x 4 and 4 x 8 foot boards from 1 to 4.5 inches thick (LTTR R-5.7 to R-26.8) in ASTM C1289 Type II, Class 2 Grade 2 (20 psi) or Grade 3 (25 psi), for single-ply, BUR, modified bitumen and coal-tar roofs. The sales sheet states the board achieves a UL Class A combustible deck assembly rating at 1 inch or greater without a slip sheet or gypsum cover board, and lists FM 4450 and FM 4470 Class 1 approval, UL 790, UL 1256, UL 263, ASTM D3273 mold resistance, ICC-ES ESR-1608 and Florida Product Approval FL 5968.