just a 2 part epoxy, that he was picking up at a hardware store. he had an old friend that would special order it for him. but i found some cheaper then what he paid, and it will work. he was paying 60 bucks a gallon, and you have to buy 2 gallons, 1 epoxy, and the catalists. and his was a 1 to 1 ratio. the stuff I can get is 60 bucks a gallon, and its 3 to 1 ratio. so it I guess will work out to the same amount of money, if I need 2 gallons..