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Old 10-27-2018, 08:21 PM   #1
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Cleaning up Roof sealant

I am working on 2 class A's. One has a fiberglass roof andsthe other is metal. The fiberglass roof hass 2 different sealants. One looks like self levelling so I assume it is a dicor product. It also has some polyurethane sealant. Both are dirty and before I put on more sealant it needs to be cleaned. What product would you use? The metal roof has silicone as well as some self levelling. I have read that prep all can be used to remove silicone and silicone does not stick to silicone. What do I do? Removing all the silicone would be tough. Is there a sealant that would stick to silicone? I never use silicone on an exposed surface!
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Old 10-27-2018, 10:03 PM   #2
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Nothing sticks to silicone. Your have to remove it all, then use a solvent to get the rest off, it then do it right.
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Old 10-28-2018, 07:20 AM   #3
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I have used wet / dry sandpaper after scraping all silicone I could see. I was amazed at how much remained on what appeared as a clean surface.
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Old 10-28-2018, 07:48 AM   #4
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Mineral spirits to clean the dicor. Elbow grease for the silicone.
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