Today at Vail RV, we have a beautiful 2017 Montana that the slide room seals appear to be melting. They're actually liquefying because they're coming into contact with butyl. Super common. Most manufacturers just slap this stuff on there with complete disregard for what might happen to it in a year or two or three. What you'll see if you scroll through the images is how everything went wrong and how it should have been done in the first place.

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