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Butyl tape is used behind the flange, and YES it’s very common to see clear silicone across the top and sides. Some manufacturers use “proseal” it’s like silicone but never really “sets”.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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