MAS Penetrating Epoxy

$24.74 ~~$39.9~~ In stock

MAS Penetrating Epoxy is the product you need to strengthen soft or damaged wood. Owing to its low viscosity, it penetrates the surface of a project to seal gaps and strengthen areas of rotten wood which may not be visible externally. Perfect for: reinforcing canoes; repairing window sills; repairing costly or irreplaceable components where only a portion of an otherwise sound piece is damaged; really, anywhere there is damaged or rotten wood!

Unique solvent-free formula is 100% solids.
No solvents means no hazardous VOCs to worry about.
Highly recommended before use of MAS Deep Pour Epoxy as a seal coat, preventing bubbles or foam caused by underlying moisture content, especially in very thick projects such as "river tables".
Outperforms most competing penetrating epoxies on its own, but if you need even more penetrating power, an equal volume of your own solvent, such as acetone, denatured alcohol or mineral spirits, can be mixed in to dramatically increase diffusion into hidden or hard to reach areas.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Richard I. ★★★★★ Oct 22, 2026

That low viscosity really does the trick — it soaked right into the rotted window frame where thicker epoxies wouldn't go. After curing, the wood feels solid again, and I can finally paint over it without worrying about cracks.

Hannah Q. ★★★★★ Oct 21, 2026

I had a soft spot in a table leg that kept crumbling, and after soaking it with this stuff it's rock solid now. The way it seeps into every little gap instead of sitting on top is honestly impressive.

Ryan ★★★★★ Oct 20, 2026

The low viscosity is exactly what sold me—it flows into every tiny crack like water, and the rotted wood in my window sill feels rock solid after it cured. I barely needed any to get full penetration, so the bottle will last a lot longer than I expected.