Where to Buy

  • Where can I find your products? What if the store does not carry a particular item?

    You can find our Finish 1st products at Autozone and Grainger.

  • Can I buy your products directly from you?

    We're sorry, at this time we only sell our products through our distributors and not directly to the public. Please see our Where to Buy page on our website.

  • When should body filler be sanded?

    At typical ambient temperatures of 72° to 78°F, body fillers and putties can usually be sanded within 20 minutes of its application. Cooler temperatures may require a longer time to achieve a good feather-edge.

  • When can body filler be painted?

    At typical ambient temperatures of 72° to 78°F, primer can be applied to the body filler one hour after its application.

  • How thick should fillers be applied?

    Body filler may typically be applied at thicknesses up to ¼ inch unless otherwise specified and putties up to 1/8 inch thick.

  • What types of paint should be applied over filler?

    Most typical single-stage or base-coat/clear-coat finishes are suitable for use over body fillers and putties. Care should be taken with the use of waterborne finishes…the body filler should be thoroughly cured and a catalyzed primer applied over the filled areas to reduce possible moisture absorption.

  • What type of primers can be used?

    Most primers are suitable for use over top of body fillers and putties. For best results when using today’s finishes, 2K urethane or epoxy primers afford the best holdout.

  • Can body filler be applied to wood?

    Body filler will adhere very well to clean, dry wood.

  • Can filler be used on concrete?

    Body filler will adhere very well to clean, dry concrete.

  • Is body filler water resistant?

    Body fillers and putties are porous and will absorb moisture. If greater moisture resistance is required, use a fiberglass reinforced filler or topcoat with fiberglass resin.

  • Can I apply filler over a painted surface?

    Yes, over properly sanded (80-180 grit) OEM finishes. Do not apply over aftermarket lacquers, enamels or water-based finishes. Never apply to freshly painted or unstable (checked/crazed etc.) finishes.

  • What causes my body filler to have pinholes?

    Pinholes arise due to the entrapment of air in the body filler. Stirring the body filler and “whipping” air into it during catalyzation can trap excess air. Applying the filler too thick can also result in excessive pinholes.

  • What is the mixing ratio for body filler to cream hardener?

    ( 2% by weight) 50 to 1 mix ratio of body filler to cream hardener is typical. A 4 inch puddle of filler to a single ribbon or bead of cream hardener across the center of the filler from edge to edge is equivalent.

  • Does it matter what color the cream hardener is?

    The color of the cream hardener (catalyst) used does not matter however, it is best to use a contrasting color to be able to see when the hardener is thoroughly mixed with the filler.

  • How can I remove cured filler?

    Unfortunately, cured body filler does not dissolve readily with any thinner or solvent. Typically the only way to remove it is to sand or grind it off.

  • Body filler is not curing, why?

    If the body filler is curing too slowly or not at all, it could be due to colder shop conditions; the use to too little cream hardener; or the presence of very high humidity conditions. If BPO hardener has separated or crystallized in the tube, don’t use it as it may have lost its ability to catalyze the filler properly.

  • Why is the filler curing too fast?

    If the filler is curing too fast, it is likely due to very hot shop conditions or the use of an excessive amount of cream hardener.

  • Can body filler be thinned to make it pourable?

    Yes, using a plastic thinner or “honey” specifically for body filler. May also be thinned with a low viscosity finishing glaze.

  • What solvent should be used for cleaning up?

    For non-catalyzed body filler, MEK or Acetone may be used to clean up tools and spills.

  • Will body filler melt Styrofoam?

    Yes, the styrene monomer in the body filler will dissolve Styrofoam.

  • What is the lowest temperature that body fillers can be used in?

    If properly catalyzed, body fillers and putties will cure at temperatures as low as 50°F however the cure will be exceedingly slow. Use of an infrared heat lamp or other heat source to warm the repair area is advisable at such low temperatures to ensure a thorough cure (be sure to keep the heat source at least 36 inches from the surface being repaired and do not use an open flame).

  • What is the highest temperature that body filler can be used in?

    Body fillers and putties can be applied in temperatures in excess of 100°F however working time will be severely decreased. Cured body fillers and putties should never be exposed to temperatures beyond 200°F for more than 30 minutes due to possible loss of adhesion.

  • What happens if I use too little hardener in my body filler mix?

    The body filler will cure more slowly resulting in longer dry-to-sand time. You will also risk shrinkage, poor adhesion and the sandpaper might clog more easily.