The DiversiTech Pro-Tite® Resin Based Thread Sealant CLL-1 is a high-performance sealing compound designed to create secure, leak-resistant threaded pipe connections in HVAC, refrigeration, plumbing, and industrial applications. Its durable resin-based formula provides dependable sealing performance on metal threaded fittings while helping prevent leaks caused by vibration, pressure, and temperature changes.