SAF-T-LOK Anaerobic Adhesive Thread Sealants act as sealing compounds hardening in voids, thread gaps or between cylindrical parts and seal against leakage of fluids or gasses under high pressure or severe vibration. These adhesive thread sealant products were formulated for a variety of applications and specifically to improve customer's equipment performance. RSRefrigerant Thread Sealant For refrigeration systems High strength High viscosity Vibration resistant Chemical/refrigerant resistant Performs from -100 to 350F (-73 to 177C)