TRUFAST THERMAL-GRIP Flat Plastic Washers are designed for secure and durable attachment of house wrap, air barriers, and rigid insulation. Featuring a 2 in. solid cap design, these washers provide superior holding power while preventing fastener pull-through, ensuring long-lasting performance. Compatible with #6, #8 and most #10 diameter screws (center hole opening 0.185 in.). Recommened with Grip-Deck screws. Ideal for building wrap and insulation attachment, the washers feature a flat-bottom design for flush mounting and a reinforced center bullseye ring that enhances fastener grip. The flexible perimeter compresses against surfaces, reducing tearing and improving overall sealing performance. Built with Carbon Black UV stabilizers, these washers resist degradation in outdoor applications. They work with a variety of fastening methods and are suitable for walls, ceilings, and other insulation applications. Key Benefits: Secure House Wrap Attachment – Recommended by air barrier manufacturers. Superior Holding Power – 2 in. solid cap design prevents pull-through. Flush Mounting – Flat bottom ensures a tight, secure fit. Reduces Tearing – Flexible perimeter compresses against surfaces. UV-Stabilized Durability – Carbon Black UV stabilizers for outdoor use. Versatile Applications – Ideal for building wrap, rigid insulation, and mineral wool. Tested for Air Barrier Performance – Ensures system integrity and energy efficiency.