Sealing bottom of trailer floor

My toy hauler has a 3/4" plywood floor. The bottom side is painted with some sort of black sealer. Near the rear of the trailer this coating is failing. Any ideas what would be a good sealer to paint it with?
Al
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Greetings,
Use an oil-based exterior porch and floor paint. It will probably have a photo of a wooden porch on the front unless you are in a state where they are illegal. In this case, if you are a criminal, you might go to a paint store and lie about what you are using the paint for and if they believe you they will sell you good oil based paint for exterior "industrial" use.
Hope this helps, William
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wrote:

What about roof coating?
Al
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Any auto parts store will have spray on undercoating. Convenient, quick and durable. Go for it.
Joe
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