Strong and Stable, SuperFil is twice as strong as automotive fillers with about one-third the weight. This all epoxy filler is guaranteed not to shrink or crack. Easy Application: For best results, mix SuperFil by weight, 2 parts A to 1 part B. Blend thoroughly until the mixture has an even light blue color with no streaks. Apply with a squeegee to desired thickness. Ready to sand in 8 hours. Drying Time: Curing time to sand from 8 - 12 hours, depending upon temperature. Pot life at 77 degrees is 60 minutes. Cures to sandibility at 77 degrees in 12 hours. Excellent Sandibility: When cured, SuperFil sands far more easily than any other epoxy filler. Wide range of materials: Can Be Used on Composites, Wood, Metal, Fiberglass, Plastics, and Other Materials for reliable bonding across multiple substrates Light: SuperFil weighs 15 ounces per mixed Quart! Excellent for fillets or large holes, mixes at the consistency of peanut butter. Light Enough For Model Aircraft! An ultra lightweight corrosion-inhibiting filler for aircraft, marine, and automotive use. Adheres to composites, bare aluminum, steel, and bare or varnished wood. 3.68 pounds per gallon compared to 10 pounds for bondo. SuperFil is twice as strong as automotive fillers with about one-third the weight. And SuperFil is ALL EPOXY and WILL NOT SHRINK! Curing time to sand from 8 hours to overnight, depending upon temperature. When cured, SuperFil sands far more easily than any other epoxy filler. SuperFil will settle in storage, so stir part A and part B individually before mixing. For best results, mix SuperFil by weight, 2 parts A to 1 part B. Blend thoroughly until the mixture has an even light blue color with no streaks. Apply with a squeegee to desired thickness. Apply peel ply and squeegee directly over the peel ply for maximum final smoothness. Remove peel ply when cured, and sand. Pot life at 77 degrees is 60 minutes. Cures to sandibility at 77 degrees in 12 hours. Light Enough For Model Aircraft!