RELI Premium Foaming Boat Wash RELI Premium Foaming Boat Wash at 2unces per gallon is a high foaming biodegradable boat wash combines dense foam with powerful cleaning agents to produce a squeaky clean finish with total rinse ability. It will not harm any previously applied wax or sealant. It is excellent for use with most applications such as wash mitt, brush, foam cannon or pressure washer. Highly concentrate use 2oz per gallon. It will leave your boat sparkling clean. Also available in case of 4 gallons.