The V-Gard CSS System is a blend of 440LV Epoxy and Fumed Silica thickener that is designed for thinner overlays or wall coatings that can be easily roll coat applied. Stop erosion of lightly worn floors and walls. Mix 1.5 gallons of 440LV Epoxy with a 1-gallon pail of Fumed Silica, pour the thickened slurry on the substrate and roll coat.