MAS Penetrating Epoxy

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.

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.

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.