DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Decorating and Design > Spar Urethane over water-based stain/sealer





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Old 10-19-2008, 08:45 AM  
EMayo
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Default Spar Urethane over water-based stain/sealer

Well, I am finally applying finish to the walls and ceilings in my log home and need help from someone on whether I can apply spar urethane over a water-based stain/sealer. I have used spar urethane on my bathroom vanity and utility cabinets but would also like to apply it to my bathroom walls and ceilings for moisture protection but want to be sure that my water-based stain/sealer will not cause a problem later on.

Anyone know the answer

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Old 10-19-2008, 09:01 AM  
Square Eye
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As long as it's completely dry, you can use a spar urethane over water based stains. Spar will seal and adhere to the fibers of the wood and into the pores. Since water base or oil based stains do not seal the wood completely, the spar will be fine.

Spar over paint is a completely different thing though. Spar will yellow over time and will leave streaks where it's thicker and thinner... Will look horrible. May peel because the paint seals and has a smooth finish, will not blend in over paint if you have a repair to do later on.

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Old 11-22-2008, 08:34 PM  
Rainsford
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Default Oil Base finish over water based

I think oil based over water based works, in general, but the other way around is not as reliable, or even possible at times. Any thoughts on this?

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