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Old 12-22-2017, 12:07 PM   #12
Comodave
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If it was sealed with silicon, you need to really clean the surface to totally remove the silicone. I don’t know of any cleaners that will completely remove the silicone. Usually you have to scrape as much off as possible and then sand off the rest until water does not bead up on the surface. That is why most people do not use silicone. It can seal very well but it is almost impossible to remove well enough to let another sealant to stick.
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