Sealing & waterproofing MDF

Anybody know of a way to seal and waterproof mdf for outdoor signs?

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Honestly, The best way is to choose a diffent material. Even with coats and coats of paint and urethane. The moisture will find a way in and ruin the project.

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I have to agree with Seth here, MDF and outdoors just don’t belong in the same sentence in my opinion.

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Yeah. That’s what I thought. Thanks.

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Hello. Don’t know where you are but do a search for medite tricoya mdf. I’m in Scotland and have worked with this on a few exterior projects. Hope that helps.

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Sorry P.S. It’s really expensive , £200 odd for an 8’x4’

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Thanks.

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