2 Answers. This should be ok if you gave the stain 3-4 days to properly dry out. You’ll want the oil-based drying agent to completely vaporize from the stain before applying the water-based finish. You may apply the Minwax Water Based Polyurethane over a fully cured Minwax Wood Finish Stain (oil-based).
How long do you have to wait between stain and polyurethane?
While family and friends may give you helpful advice, reading the instructions on the can of stain leads to a beautiful final finish. Many brands advise buyers to plan on four to 12 hours of drying time between coats of stain and another 12 to 24 hours before applying the first coat of polyurethane.