Prime and lubricate pipe joints safely and effectively with Weld-On 87715 Milky Seal Lube Gasket Lubricant 1 gal. This lubricant is specially designed for use on slip-on or “O”-ring-type joints with rubber or synthetic-rubber gaskets. This nontoxic and noncorrosive pipe lubricant transfers no taste or odor to potable water systems and is 100-percent water soluble.