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I'm looking for a good food grade elastomeric coating to make my wood grow beds water tight.  Does anybody have any ideas?  Thanks  Doc

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Hey Doc,

There are two ways to do this.  One you can use a epoxy paint to seal the wood edges.  The method I use on mine is polyurethane with a calking gun. 

If you are really serious about getting food grade material then the best you can do is silicone.  I don't know of anything else that works on wood beds too well.  Silicone has a tendency to come loose after a while.

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