This is a Polyvinyl Acetate co-polymer based glue that works great for application methods including spraying and slurry. Our glue is formulated with a 50% solids content. This new glue has improved water resistance and strength. The guys in the lab worked hard and hit it out of the park with this one. We think it is going to be a game changer! Buy in a 5 gallon pail to just try it out, or for small back yard pump tracks. Ships UPS