Epoxy grout is extremely durable and almost completely stain proof. Epoxy grout is made from two different resins mixed with a filler , making it waterproof and better suited to harsher cleaning products. Epoxy thin sets offer greater bond strength and chemical resistance than cementitious grouts. Waterproof epoxy grout is ideal for showers and bathrooms because of its bonding power. Epoxy grout won’t crack, stain, or shrink, making it an ideal solution for wet environments.