Foam Board Fastening Washers The GURU® Galvanized Washers are steel fastening washers designed to secure Water-Stop Foam Board during installation. Their tabbed design helps hold foam boards firmly in place while providing reliable fastening performance for shower and waterproofing assemblies. Even Fastening Pressure Across the Board Each washer distributes fastening pressure across the board surface to help reduce localized stress around fasteners. This design supports secure foam board installation while maintaining consistent fastening across the installation area. Built for Shower and Waterproofing Systems Manufactured from galvanized steel for durability, these washers are designed for use with Water-Stop Foam Board in wet-area wall installations, shower systems, and other waterproofing projects. Each package contains 200 washers for multiple installations.
