ComStar's Copper Lock is the revolutionary method for soldering pipes! Designed for the US Space Program!;Simply apply it inside the connector and/or onto the pipe (or both); making sure the liquid is totally around the circumference, fit in the pipe and within 60 seconds a permanent leak-proof seal will prevail;No heat or solder is required to create a permanent leak-proof bond;10ml bottle will bond as many as 40 3/8 inch fittings;Exceeds all US Military copper bonding specifications: Mil-S-46163A Type I Grade K, Mil-S-224723E Letter Grade CVV

• ComStar Copper Lock, No Heat Solder, 10 mL

ComStar Copper Lock, No Heat Solder, 10 mLComstar