In just about every kit, we use SPE-HD-PRO. Our High Build Epoxy System (SPE-HD-PRO) is ideal for a variety of applications. SPE-HD-PRO is a two component 93% (+/- 1%) solids epoxy colored coating designed for applications where a high solids primer/base coat is needed before applying mid coat or 100% solids topcoats for build coats over concrete.