Just got off the phone with Thor tech support. They say the TPO manufacture says use only Dicor caulking and for cleaning the TPO roof only a mild dish washing soap like Dawn. Also he said when cleaning use either a soft rag or sponge, no brushes. FWIW I had called about my up coming solar roof install.
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2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy
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