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  • Repairs wood rot or wood decay on interior or exterior wood
  • Stop wood rot, binds wood fiber to repair and fill wood damage
  • Easy to apply, dries in 2 hours - sand, stain or paint after use
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Product Overview

Varathane 16 oz. Wood Hardener restores and revitalizes wood damage including wood rot or wood decay. Penetrates into wood surfaces and strengthens and reinforces old wood fibers. Use to fix and repair interior or exterior wood surfaces with rotting wood or decaying wood including wood furniture, wood floors, wood doors, wood decks or trim.
  • Apply to interior or exterior wood surfaces to restore, fix or repair wood rot and wood decay
  • Works on all wood surfaces including wood furniture, wood floors, wood decks, cabinets, trim, doors and more
  • Clear liquid penetrates and binds with wood fibers to fix and repair wood damage
  • Durable formula resists shrinkage over time
  • Remove wood decay and crumbles to reach sound wood, apply using disposable bristle brush
  • Apply several coats to area quickly until surface becomes shiny
  • Allow 2 to 4 hours of dry time
  • Cleans up with acetone
  • Can sand, paint or stain if desired
  • Online price includes PaintCare fee in the following states: CA, CO, CT, DC, ME, MN, OR, RI, VT, WA
  • California residents

Additional Resources

From the Manufacturer

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/case
Ratings
(1549)
(241)
(647)
(339)
Container Size1 Quart16 Ounce12 Ounce16 Ounce
Interior/ExteriorExterior,InteriorInteriorExteriorExterior,Interior
Wood Restoration Product TypeWood FillerWood HardenerWood FillerWood Filler
Paint Tool Product TypeWood FillerPatching and Repair ProductPatching and Repair ProductPatching and Repair Product
Paint/Stain Clean UpSoap & WaterMineral SpiritsLacquer ThinnerWater
Base MaterialLatexOil BasedAcrylicLatex
Pack Size1114
View ProductView ProductView ProductView Product

Specifications

Dimensions

Container Size16 OunceProduct Depth (in.)6.625 in
Product Height (in.)7.625 inProduct Width (in.)6.625 in

Details

Base MaterialOil BasedColor FamilyClear
Color/FinishClearDry to touch (min.)120 min
FeaturesNo Additional FeaturesInterior Paint & Stains Product TypeWood Filler
Interior/ExteriorInteriorKitNo
Pack Size1Paint Tool Product TypePatching and Repair Product
Paint/Stain Clean UpMineral SpiritsPrimer requiredNo
Product Weight (lb.)1 lbTransparencyClear
Wood Restoration Product TypeWood Hardener

Warranty / Certifications

Manufacturer WarrantySatisfaction guaranteed for full refund of purchase price

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.4
    out of 241 reviews
  • 86%recommend this product
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Showing 1-10 of 241 reviews
It hardens wood
It hardens wood
by
  • Verified Purchase
  • Recommended
Very thin. Dissolves adjacent paint job.
I painted the bottom of my chimney chase. It soaked into the wood good, but it softened and dissolved the other good paint on the board. So I had to scrape it (the good paint) off and repaint it. It's clear and thin, and looks just like pure acetone, but it does have some hardener in it. When it dries, it's like varnish or something. It's so thin, it drips from the brush and painting overhead is virtually impossible. I had to sacrifice a spray bottle with this stuff. And it ruined that bottle of course. I painted the bottom of my garage doors, and again it ruined the adjacent paint job. Maybe if you are extremely careful you can get just the bad wood. Lastly, it quickly and completely dissolved the whole bottom of the red solo cup i was using for touchup, and spilled contents on my driveway. It was clear and didn't think much about it, but it dried a pale white, so now i have a 1' diameter white spot on my concrete driveway. You have to dig out all the old wood before painting. I think this stuff is maybe one step up from just replacing the whole wood section. It has drawbacks, and is hard to apply. I would probably do myself a favor and dispose of the remaining can. It was $13 at Home Depot. You have to pour it into another container to use it, as the spout is only 1" diameter.
by
Response from Rust-OleumSupportJul 7, 2020
Thank you for your feedback, Vince! Rust-Oleum Varathane Wood Hardener needs to be applied with a disposable bristle brush and we do not recommend it for use on previously painted sound wood surfaces. You also want to ensure that all safety and application instructions are followed on the label for the best results.
- Rust-Oleum Product Support 3 Rustoleum
    6 found this review helpful
    Better than expected, so far at least. It actually made soft, spongy wood quite solid. I was skep...
    Better than expected, so far at least. It actually made soft, spongy wood quite solid. I was skeptical, because the instructions said to remove all the "decayed and soft wood." And if you do that, what's the point? If the wood were not "decayed and soft," I wouldn't need a wood hardener. Still, I thought it was worth a try, since the alternative would have involved replacing a section of flooring. I removed the parts that were rotten to the point of really disintegrating and hoped that somehow it would work on the remaining semi-rotten wood. It did. The wood soaked it up and, after it dried, I applied a second coat and it got even harder. Then I filled a few large gaps in the wood with Bondo for Wood and, at least so far, it seems to be a very solid surface. If your area is hidden, or if you're willing to paint afterwards, this might work.
    by
    • DIY
    • Verified Purchase
    • Recommended
    15 found this review helpful
    I use this to strengthen wood I am repairing on furniture I am refurbishing, and in my woodworkin...
    I use this to strengthen wood I am repairing on furniture I am refurbishing, and in my woodworking. This is a chalice I made and the maple wood I used needed to be filled/strengthened as I turned it.
    by
      • Recommended
      2 found this review helpful
      I purchased this product to treat a spalted maple hollow form bowl that I turned on a lathe. Spal...
      I purchased this product to treat a spalted maple hollow form bowl that I turned on a lathe. Spalted wood has very interesting color and pattern but since spalting is the beginning of rot, it is much softer than wood not spalted. This product allowed me to sand and finish to a nice shine. It definitely met my expectations.
      by
      • Verified Purchase
      • Recommended
      11 found this review helpful
      Works great,Works great,
      Works great, seems expensive
      by
      • Verified Purchase
      I am using this to harden blocks of wood before...
      I am using this to harden blocks of wood before I turn them on the lathe works out pretty well.
      by
      • Verified Purchase
      Great stuff to harden up wood. I used it on...
      Great stuff to harden up wood. I used it on end grain of an exposed wood member that was deteriorating. It bound the wood fibers together and was able to paint with no further issues 10 yrs later. I will admit, I kept applying and soaking the end piece the best I could and it did the job perfectly!
      by
      • Verified Purchase
      by
      • Verified Purchase
      by
      • Verified Purchase
      Showing 1-10 of 241 reviews