This is a FEC632 Everglass Reinforced Body Filler, Qt size. Short strand, fiberglass reinforced body filler. High strength, high build & water proof which makes it excellent for repairing holes, rusted metal, body seams & shattered fiberglass. Contains ZNX-7 for superior adhesion & corrosion resistance to bare steel, galvanized steel & aluminum. Blue cream hardener is included.