PLASTI-GRIP 3-1/2 in. Plastic Masonry Fastener HDPMF3500

Plasti-Grip Plastic Masonry Fastener PMF is used to attach 1-1/2 in. to 2 in. rigid insulation or mineral wool to concrete or CMU block. Simply pre-drill a 5/16 in. diameter hole through the insulation into the concrete/CMU insert anchor and tap flush with a hammer. This anchor provides a fast and efficient way of mechanically attaching insulation.