This is a two component system: A: Resin an B: Hardner
This comes with both Parts A & B This is used to soak 1 layers of 36 oz fiberglass matting. Unit will cover approx. 20 sq ft. This is soak into the fiberglass and  improves upon it structural integrity making it stronger. You can use this alone as well for a primer/bond coat for multi surfaces such as wood and concrete ETC for waterproofing.
Unit Includes: 3 Quarts of FRP Resin and 1 Quart of Hardner=1 Gallon
Please read shipping info about the cost to ship.