2 in. x 8 in. x 12 ft. #2 Prime Ground ntact Pressure rrex Protection Board – Sitepro Direct Proguard Floor Protection Board mes in three main varieties: Non Fire-Retardant Black, Non Fire-Retardant White and Flame-Retardant White (certified to LPS1207). We stock three main thicknesses – 2, 3 and 4mm.