Reply by one60fourth

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Posted on Replacing a Large Exterior Window Sill

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34 posts in 2562 days

#1 posted 11-04-2017 09:38 PM

I have one more question that I think the two of you might know how to answer. I’ve been replacing old glazing in many of the crank-out multi-pane windows I have in my house. (I’m using Dap33 putty.) I know the general advice is to overlap the glass about 1/32” when applying the final coat of paint to the glazes. I guess this helps keep moisture from seeping into any gaps between the putty and the glass. Keeping those lines straight is a tricky thing though. Not sure I can do it. I foresee lots of razor blade clean-up after painting and a lot more time invested in this project.

So here’s my question: I learned today that there is a liquid film product that you can paint onto the entirety of each glass pane. This film peels off when you’re done painting leaving nice clean lines—but alas, no overlap onto the glass. Would avoiding the overlap in favor of liquid film be a huge mistake? I wonder how effective a 1/32” sliver of paint could protect the seam anyways.

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