DeanJackson Posted April 9, 2012 Report Share Posted April 9, 2012 So, this isn't fine woodworking by any stretch. I'm sinking four 4x4 cedar posts into holes as part of a grapevine trellis. I ideally want a nontoxic, non-leeching preservative on those posts, to make them last longer. They'll be surrounded by gravel and/or clay, so I'm not expecting terribly wet soil stuck to them. That said, I'm trying to figure out which oil I'd least mind having to eat, as eventually, the grapes will pick it up. Quote Link to comment Share on other sites More sharing options...
DeanJackson Posted April 9, 2012 Author Report Share Posted April 9, 2012 I think I may shoot for wax, as I don't want to wait for BLO to fully dry. Quote Link to comment Share on other sites More sharing options...
wleingang Posted April 9, 2012 Report Share Posted April 9, 2012 Why use anything at all? I must be missing something because wax would just seal in any water. Set the post on top of 3" of gravel, and pour at least 18" of gravel around the base of the post before you put the concrete on top. It will never rot and will keep water away from the post. Quite a few pros use this method: http://prowellwoodworks.com/gate/postholes.htm Quote Link to comment Share on other sites More sharing options...
SirGreggins Posted April 17, 2012 Report Share Posted April 17, 2012 if anything just some pure tung or pure linseed oil will be ok. cedar is known for resisting decay naturally so... Quote Link to comment Share on other sites More sharing options...
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