Helmsman spar urethane is a great product, but it yellows your project the moment you put it on. ... Then I added a final coat of the liquid for extra protection and my project got more yellow.
Does spar urethane dry yellow?
About Ultimate Spar Urethane Water Based
Varathane® Ultimate Spar Urethane Water Based features a clear, non-yellowing finish that resists scratches and stays beautiful over time.
Why did spar urethane turn yellow?
Oil based polyurethanes turn the floors yellow…and over time, they become more yellow…and sometimes even a bit orangish. It's the UV rays from the sun that turn them a darker yellow or amber and the more they are exposed over time, the yellower they get. This holds true for viirtually all species.
