Convenient multi-purpose sealing, patching and mending compound Steel-filled material, mixes in your hand and hardens in minutes May be drilled, tapped, filed, sanded, sealed and painted when hardened Provides a clean, positive seal on threaded connections A high density product that resists tearing and stretching for easy, efficient application Available carded or packaged bulk on spools Complies with Military Spec. No. T-27730A and UL 31 RO