Yes, you can thin TotalBoat Penetrating Epoxy sealer up to 100% with denatured alcohol, acetone, or lacquer thinner.*** For example, Penetrating Epoxy has a mix ratio of 2 parts resin to 1 part hardener (2:1). If your quantity of mixed Penetrating Epoxy is 4.5 ounces (3 ounces of epoxy resin and 1.5 ounces of hardener), you can add up to 4.5 ounces of denatured alcohol, lacquer thinner, or acetone. Before thinning, be sure to mix the epoxy resin and hardener components thoroughly.
***DO NOT use any solvents other than denatured alcohol, lacquer thinner, or acetone to reduce TotalBoat Penetrating Epoxy.