Best Practices for Preparation If the substrate is clean and free of contaminants, the procedure is straightforward but requires attention to detail. If the substrate is too cold or damp, the latex paint may not adhere properly, leading to a condition known as fisheye, where the paint pulls away from the surface in small spots.
Using Latex Paint Over Oil Based Primer Indoors and Outdoors Best Practices
The Role of Deglossing To ensure a strong bond, the glossy finish of the oil primer must be neutralized. Apply a bonding agent specifically designed for water-based over oil-based surfaces.
Wipe away all dust with a damp cloth and allow the surface to dry completely. Lightly sand the dried oil primer with fine-grit sandpaper to create a matte finish.
Applying Latex Paint Over Oil Based Primer Indoors and Outdoors
These products modify the surface tension of the oil primer, allowing the water in the latex mixture to evaporate while the resin component forms a strong mechanical bond with the underlying layer. While this is a common practice, the reverse scenario—using a water-based finish over an oil base—requires specific products.
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