Sealing on hot days

Pete Marentay

Distinguished Professors
Here is a tip: during these 96-degree days, the wood (particularly a horizontal deck board) gets VERY hot. Applying a sealer without cooling the boards first can lead to flash drying on the surface. Cool the wood by throwing a light-colored tarp over it for 20 minutes while you are getting set up. The wood will cool as much as 20-degrees, enabling you to start sealing without problems.
 
Yes, it can flash dry. When it does, the sealer dries on the surface without sinking down deep in. You would recognize it right away. This is the kind of problem you run into when a deck is in full afternoon sunlight for hours, which obviously has not happened to you, Shaun. I just got into the habit of touching the wood to see how hot it was. If it burned to the touch, I cooled the deck down.
 
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