Can you put oil based stain over water based stain on deck?
Also, can you use a water based stain over an oil based stain?
ANSWER: Yes! but the underlying finish has to be absolutely dry. When using a water based topcoat over an oil based stain, allow oil based finishes, such as Java Gel Stain, to dry at least 72 hours before coating with a water based topcoat. → Oil based finishes amber over time.
Also asked, should I use oil or water based deck stain?
Oil molecules are smaller than water molecules so it penetrates better in comparison. The better a wood decking stain penetrates the better it performs and lasts. By nature, oil based deck stains are easier to apply than water based. Oils stains are normally more natural looking than water based stains.
Anyway, don't apply oil over a deck stain. The deck stain works because it contains pigment and a binder (usually oil or water-based finish) to bond the pigment in the wood. With some brands, there may be so little binder that a second coat is recommended.