High build epoxy primer is a two-component epoxy surfacer for use where high build and filling is required. This epoxy primer protects filler from solvent leaching. VOC compliant when used with the correct converter and reducer. Apply primer with conventional or airless sprayer. Not for use below the waterline. Protects filler from solvent-leaching Not for use below the waterline | High Build Epoxy Primer Converter, Gallon