Minwax® High Performance Wood Filler™

Minwax® High Performance Wood Filler permanently repairs damaged and rotted wood. It is used to fill gouges and holes in split, damaged or rotted exterior or interior woods.

  • It is weather, water, and rot resistant.
    • Minwax® High Performance Wood Filler is also effective as a wood adhesive where you can anchor screws and secure loose joints in furniture.
    • It strongly bonds to wood as well as almost any rigid surface including ceramics, concrete, metal, and fiberglass.

Product Details

Application Tool:    narrow putty knife
Cleanup:   acetone following manufacturer’s safety instructions
Recommended Uses:   windowsills, doors, woodwork, floors, decks, furniture
Sand:   after 30 minutes
Preparation:   prior to use, strengthen and reinforce decayed or rotting wood using Minwax® High Performance Wood Hardener


WARNING: If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. Contact the National Lead Information Hotline at 1-800-424-LEAD or log on to www.epa.gov/lead.

Preparation: Always wear high-quality chemical resistant rubber gloves and protective eyewear.

Surface must be clean, dry and free from paint, varnish, dirt and grease. If working with rotted or soft wood, remove loose material and apply Minwax® High Performance Wood Hardener to strengthen wood fibers and to form a solid base for filling.


    1. Depending on the size of the wood repair, scoop desired amount of wood filler from the can into the plastic lid and squeeze in a small amount of wood hardener from the tube, using approximately a 16:1 ratio of wood filler to wood hardener. Mix thoroughly for approximately 30 seconds or until you no longer see the white color of wood hardener. Mix only as much as can be used in 15 minutes.
    2. Apply the mixture immediately to the area to be repaired, using a plastic putty knife. Spread on a thin layer followed by a sufficient amount to fill the gap. (Note: To fill deep holes, spread on 1/8 inch thin layers one at a time until the hole is filled.) Slightly over-fil to allow for sanding down. Work quickly since the mixture remains workable for about 10 minutes at room temperature.
    3. After approximately 20 minutes, the repair should be hard enough to be carved and shaped using a sharp modeling knife. Wait at least 30 minutes to sand, plane, or file. NOTE: Once Minwax® High Performance Wood Filler has hardened, then it can be painted or stained. To stain wood filler, see directions inside cap sticker. This product absorbs stain differently than wood. It is unlikely that exact color match to the original wood will be achieved.

Clean Up: Clean application tools and hands with acetone before wood filler hardens.

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