Anon12345 Posted April 20, 2021 Report Share Posted April 20, 2021 Would the application of stain and polyurethane to a piece of green wood effectively seal that piece of wood? Specifically, would this prevent checking / cracking of the wood? If it does prevent checking / cracking of the wood, how long do you think the protection against cracking / checking would last? I ask this question because the repeated application of polyurethane to a log--and particularly to the endgrain of that log--seemed to arrest the development of swiftly-developing cracks. So far, after several months, the cracks have not expanded. But, I do not know if the cracks will eventually start to expand again. Thanks! Quote Link to comment Share on other sites More sharing options...
Popular Post Mark J Posted April 20, 2021 Popular Post Report Share Posted April 20, 2021 Short of perhaps (and only perhaps) epoxy, nothing will prevent the movement of water vapor between the wood surface and the atmosphere. But paint, polyurethane, paraffin and anchorseal, etc will slow the process down (some are more effective than others). It is the rapid loss of moisture through the end grain that causes logs and lumber to crack. Slowing the process down allows the log/lumber to loose water with out cracking. When applied to end grain only it tends to balance the loss of water from end and long grain surfaces. As long as the applied film remains intact it will slow the water loss. 3 Quote Link to comment Share on other sites More sharing options...
Formon Posted May 21, 2021 Report Share Posted May 21, 2021 The mordant penetrates deeply into the wood, making it resistant to water and sunlight. It also protects the wood against mold fungi, woodworms, woodworm beetles and other pests and diseases. But water stains for wood have a significant drawback: getting into the middle of the wood, they lift its fibers, so the wood becomes unprotected from excess moisture. Quote Link to comment Share on other sites More sharing options...
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