* Smooth, non-runny petrolatum-based solder paste flux * 100% lead-free paste cleans and fluxes copper piping * Use on copper piping and other metals without discoloration * Petroleum base provides cleaning effectiveness; Will not turn copper piping green * Cleans, fluxes and pre-tins copper piping to provide uniform solder flow * Ideal for large diameter copper piping; Compatible with all common plumbing solder alloys * Can be used in plumbing, fire sprinkler, heating, venting and air conditioning (HVAC) and other systems * Material is safe for use in drinking water applications * Excellent wetting characteristics for better solder flow and exceptional bonding * Ships within 24 hours