This is another example of having no physics in the world. These stain companies are all chemistry, and formulate according to weather in Texas. We have great sun resistance, but no adhesion.
Physics knows that you can't glue anything to naked wood. That's fine for the walls, but the deck floors die in the winter. I have never had any deck treatment stay over the winter at the cottage. This was made worse when the industry all went to water-based.
I love water-based but it just flies off the deck. With an eye to the physics of adhesion, I have solved the issue. Thank me and send money! :)
I use a long-polymer acrylic glue - Weldbond. And I use Behr Deckover because it is cheaper than the solid stain and very thick.
In your empty ice cream plastic container (Kawartha Dairy from Costco), you thin the paint with water, so it has a consistency of whole milk. Then add a blob of glue, about 10% of the volume. Mix well, because the glue is difficult to mix.
On scraped wood, lay down the thin coat. Any left-over dry paint will lift. Try to get it all clean. You are successful if the new paint is sucked up into the wood. You may need several coats. When it sucks in, you get the long polymers wrapping around the wood fibers.
When that is all done, make a thick mix of the consistency of maple syrup, and put in 10% glue. You need at least two coats for sun resistance. If you just leave the thin coat, it falls apart under the sun.
I have a test section on the deck at the cottage and it has lasted the winter. The thick stuff is great for old cedar, makes everything new.
No comments:
Post a Comment