Copper Washer Gaskets. The term washer is often applied to various gasket types such as those used to seal the control valve in taps. Crush washers are made of a soft metal such as aluminium or copper, and are used to seal fluid or gas connections such as those found in an internal combustion engine. Used For : They are mostly made from metal or plastic, depending upon the application for which they will be used. Rubber washers are also available, though they are mostly used for preventing water leakage in certain applications. Similarly, washers also help prevent galvanic corrosion in certain machines Size Available in Washer : 1" , 1.1/2" , 1/2" , 1/4" , 2" , 3/4" , 3/8" We Are Leading in Copper Washer At Makarpura GIDC We Are Leading in Copper Washer At Waghodia GIDC We Are Leading in Copper Washer At Manjusar Savli We Are Leading in Copper Washer At Karjan