The Grainger Approved Vendor 1/2″X15FT 12.7mmX4.57mm PTFE Joint Sealant 21TF49 is a high-quality electrical tape made by 3M under their Temflex model. This adhesive tape is specifically designed for sealing electrical joints and connections, providing a reliable and durable seal to prevent leaks and corrosion. With its PTFE material and specific dimensions, this joint sealant is ideal for various industrial and commercial applications requiring a secure and waterproof seal.