Penetrating Epoxy Sealer
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Penetrating Epoxy Sealer


We can help you if you have ever experienced incomplete curing from other penetrating epoxy systems. Our MAS Epoxies Penetrating Epoxy Sealer is solvent free (100% solids) so you know you are going to get penetrating power and a complete cure. It also means that our Penetrating Epoxy is VOC-Free, which brings our customers peace of mind.  A resin sealer like our Penetrating Epoxy System is ideal for repairs because of their strength and waterproofing characteristics.  If you need a resin wood sealer that has great penetrating power look no further.

Not compatible with 2:1 pumps

(1 customer review)


Penetrating Epoxy Sealer

  • Packaged solvent-free epoxy sealer so you can use it without concerns of VOCs
  • Excellent penetrating power without adding your own solvent
  • Seals gaps and strengthens areas in rotten wood that are not visible externally
  • Excellent for:
    • Window sills
    • Deck repair
    • Door frames
    • Transom reinforcement
    • And anywhere else you would like to restore rotten wood

MAS Epoxies designed Penetrating Epoxy Sealer to strengthen soft wood.  This product is unique in that it does not contain any solvent, which means you are buying 100% solids.  It also means that you do not have to worry about volatile organic compounds (VOCs) when working with our PES.  Customers have used this product to reinforce canoes, repair window sills and fix wood rot.  Try it for your next project and see why MAS products are great for beginners and loved by professionals.

Erik Curtis used MAS Penetrating Epoxy to stabilize insect damage and create a sculpture!


Safety Data Sheets & Technical Data

Penetrating Epoxy Sealer Resin
Penetrating Epoxy Sealer Hardener
Technical Data Bulletin

How much will I need?

What are the dimensions of your project?
Here is the amount of epoxy resin you will need


Questions and answers of the customers

  1. 0 votes
    Q The troubleshooting recommendation for removing sticky/tacky epoxy seems to apply more to deep po...... Read more answer now
    Asked by Jeff Stone on January 25, 2021 3:03 pm
    Answered by the admin

    You would need to soak the uncured are with a solvent like denatured alcohol or acetone. You'll need to wait until the solvent fully flashes off then recoat the entire surface with Penetrating Epoxy. 

  2. 0 votes
    Q Is your product recommended for an outdoor kitchen butcher block style counter top in the direct ...... Read more answer now
    Asked by Saul on January 23, 2021 11:04 am
    Answered by the admin

    Generally speaking, epoxy tends to yellow or chalk when exposed to direct sun light for extended periods of time, which is why we recommend protecting epoxies, MAS being no exception, with a UV protectant varnish or paint for exterior applications.  All epoxy resin systems are not created equal. There are some UV resistant epoxy laminating systems out there that are slower to yellow over time, but I don’t know of a system that is 100% UV resistant. 

  3. 0 votes
    Q the surface is still tacky after more than a week of cure time. presumably a mixing error on my p...... Read more answer now
    Asked by Jeff Stone on January 22, 2021 3:25 pm
    Answered by the admin

    You want to try to remove the soft of sticky portions. Use denatured alcohol or acetone and check out the troubleshooting section at the top of the page there's an article that explains your exact situation. The article is titled  "How to remove soft or sticky resin"

  4. 0 votes
    Q Can this be used over polyurethane to seal prior to a pour?... Read more answer now
    Asked by David Rohman on January 4, 2021 11:30 am
    Answered by the admin

    You would want to use PES as the seal coat. Applying epoxy over poly can cause delamination issues. 

  5. 0 votes
    Q Will PES still penetrate wood well after a washcoat and stain have been applied?... Read more answer now
    Asked by Jeff Stone on January 2, 2021 4:20 pm
    Answered by the admin

    Unfortunately the washcoat creates a layer that can reduce the effectiveness of PES. 

  6. 0 votes
    Q Can I use this product to waterproof plywood, if so how many coats would you recommend?... Read more answer now
    Asked by Robert Baker on December 30, 2020 6:53 pm
    Answered by the admin

    You could certainly use it for that, you'd need 2-4 coats or until you reach uniform coverage. Keep in mind epoxy degrades in UV light so you will to paint it or cover it with a high quality spar varnish for UV protection. 

  7. 0 votes
    Q Can this product PES be used over oil-based stains?... Read more answer now
    Asked by William Olson on December 22, 2020 11:23 am
    Answered by the admin

    Typically you would want to use a water-based stain when using epoxy. If the oil-based stain is already applied, you will need to wait for it fully dry (check with the stain manufacturer for a timetable) then you can apply a thin seal coat. You may experience orange peel or fish eyes in the seal coat, if so, wait for it to cure, sand to knock down any deviations, liberally wipe the surface with denature alcohol or acetone then apply another seal coat. 

  8. 0 votes
    Q I want to use this product to fill some cracks and other defects in a walnut slab, but the slab w...... Read more answer now
    Asked by MS on December 20, 2020 11:28 am
    Answered by the admin

    It can be used for that application

  9. 0 votes
    Q Can MAS Penetrating Epoxy Sealer or Deep Pour be used to seal pitch pockets in Larch boards? The ...... Read more answer now
    Asked by Tim Devine on December 16, 2020 5:27 pm
    Answered by the admin

    You could use penetrating epoxy to seal them. Depending on the volume you could use Deep Pour to fill them, the smaller the volume the longer the epoxy will take to cure though. Oil top dressings can be applied to epoxy 

  10. 0 votes
    Q how can it be thinned with either acetone or alcohol? Are they two different types of chemical ? ...... Read more answer now
    Asked by Charles Phipps on December 15, 2020 9:23 am
    Answered by the admin

    Acetone and Denatured alcohol are solvents for epoxy resin, you would mix part A and B together then add the solvent. Environmentals like air temp, material temp and humidity will play a factor in the cure time. The coverage is entirely depending on the porosity of the material you are applying it to. Absorption on punky wood will be much greater and will require more material then applications on closed grain wood or dense hardwoods.   

  11. 0 votes
    Q How long does it take to harden? I know it takes 36 + hours to cure, but I want to do both sides ...... Read more answer now
    Asked by Debra I Craig on November 5, 2020 12:33 am
    Answered by the admin

    It depends on the air temperature, the warmer it is the faster it will setup. You would likely need around 24 hours before it's hardened to a point it can be turned over. 

  12. 0 votes
    Q Does a wood surface treated with PES need to be sanded and wiped prior to coating/filling with MA...... Read more answer now
    Asked by Brian A. Castle on October 7, 2020 7:19 am
    Answered by the admin

    If you can no longer make a fingernail impression in the PES then you will need to scuff it up with sandpaper then wipe it down with denatured alcohol or acetone. If its still soft enough to dent with a fingernail, you can pour the deep pour without sanding. 

  13. 0 votes
    Q Can you thin out the epoxy with acetone or something similar to increase penetration? I’m plannin...... Read more answer now
    Asked by Eric Lassiter on October 4, 2020 9:24 pm
    Answered by the admin

    Yes it can be thinned with acetone or denatured alcohol up to 50%. 

    Penetrating Epoxy Technical Data 

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1 review for Penetrating Epoxy Sealer

  1. Alex

    Excellent for any ttt try or of wood.

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