I helped a buddy roll a rubber paint/sealant on his unit. Brand was Kool seal, at $110 a gallon plus we had to prime with kool seal primer, don't remember the price. That product recommended by his dealer, purchased on line. Multiple brands out there. 17 years is a good run for a membrane roof.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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