ThePERLOKVERSA-FAST® FASTENER System is engineered to secure insulation, coverboards and base sheets to lightweight insulating concrete (LWIC) and gypsum decks. The PERLOK VERSA-FAST® FASTENER features an exclusive thread design engineered for exceptional pull out. When used with our PERLOK VERSA-FAST® METAL PLATE, multiple fasteners can be installed to achieve the minimum pullout.