Oil and water do not mix, and the low surface energy of a fully cured oil primer prevents the latex from making a mechanical bond. Furthermore, if the surface is new, lightly sanded, and treated with a high-quality bonding agent, the latex paint can adhere sufficiently for a durable finish, provided environmental conditions are stable.
Oil Primer And Latex Paint Test: Will Latex Stick Without Bonding Primer?
Oil and alkyd paints are designed to bond seamlessly with oil based primers. Lightly sand the primer with fine-grit sandpaper to create a rough profile.
Without a strong bond, the paint film cannot withstand the natural expansion and contraction of the substrate, leading to cracks and eventual failure. Consider applying a bonding primer specifically designed for slick surfaces.
Oil Primer And Latex Paint Test: Can Latex Bond to Oil Primed Surfaces?
Preparation is Non-Negotiable Skipping preparation is the fastest way to guarantee a failed result. If you are determined to use latex over the oil cured primer, the surface must be aggressively treated to provide a grip point.
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