Item #: 132-5. Thinner used exclusively with #300 Dacproofer; or during humid conditions with SpraFil #301 and with Butyrate #125. Also used with the tinted butyrate to provide a higher gloss. Thinner ratio is 1:1 with everything but the color. With the tinted butyrate, thinning ratio is 2:1. 5 Gallon.