Preparing the Surface for Adhesion Surface preparation is the single most important factor in achieving a durable finish. An oil based stain penetrates the wood fibers and cures into a hard, non-porous film that repels moisture.
Sealer Compatibility: Ensuring Water-Based Poly Adheres to Oil Stain
While most modern water-based finishes are engineered to adhere to previously stained wood, you should always perform a test in an inconspicuous area or on a scrap piece of wood. You cannot simply apply a water-based product over a slick, fully cured oil stain and expect excellent results.
If this happens, you can wipe the surface with a mixture of water and denatured alcohol or lightly sand the area and reapply the finish. " Applying a water-based product over a slow-drying oil stain can also lead to a wrinkled or bubbled appearance, so ensuring the stain is bone dry is non-negotiable.
Sealer Compatibility: Ensuring Water-Based Poly Adheres to Oil Stain
Applying a water based polyurethane over an oil based stain is a common question among DIY enthusiasts and professional contractors alike. Conversely, water based polyurethane is formulated to dry through the evaporation of water, creating a film that wants to adhere to porous or slightly rough surfaces.
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