This is a two component system: A: Resin an B: HardnerThis comes with both Parts A & B.  Unit will cover approx. 80sq 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 Gallons of FRP Resin and 1 Gallon of Hardner=4 Gallons Total

Please read shipping info about the cost to ship.