Olympic 290 G 1 gal White Paralon 2 Chlorinated Rubber is our standard grade rubber-base coating which should yield two or three years of service under normal conditions. This coating is compatible with other chlorinated rubber pool coatings. Please check the top of the can for a six digit batch number starting with the letter "B". If all cans do not have the same batch number, mix or box the contents of each in a separate larger container. This will ensure color uniformity on your pool.