all fired up 6 Posted June 30, 2019 Share Posted June 30, 2019 I have unbolted some fittings on my boat. Inside the deck they were fastened through a Stainles Steel backing plate. The backing plate appears to be sitting on a thin layer of a rubbery like compound something like Sikaflex. Is there a method or chemical to clean this stuff off the fibreglass? Or do I have to do it the tedious way and carefully scrape it off with a sharp chisel or similar. a.f.u Quote Link to post Share on other sites
Zozza 293 Posted June 30, 2019 Share Posted June 30, 2019 Isn't there some sort of special wire that slices through sikaflex like butter? Or so I've been told. Quote Link to post Share on other sites
wheels 543 Posted July 1, 2019 Share Posted July 1, 2019 Cured Polyurathanes will not dissolve by anything I know of. At least anything that also would not dissolve the Boat as well.A flat knife blade on one of those vibrating multi tools ( not what you are thinking KM ) cuts the stuff well and then it could be a case of sanding away anything left. And it is not easy to sand either. Quote Link to post Share on other sites
clochmerle 2 Posted July 2, 2019 Share Posted July 2, 2019 I have the answer, what you need are plastic razor blades. They are magical, you can scrape off almost anything and not damage the surface, then a scrub with citrus cleaner or meths to remove the residue. I buy mine from aliexpress. Not sure who locally sells them. I removed boat window sealant, and even a van roof with baked on vinyl wrap. Quote Link to post Share on other sites
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