I bought a seal protectant from the dealer. All I do is spray it heavily all over the rubber seals, top, sides and bottom. Its a foam that breaks down to a liquid. Seems to work pretty good as it cut down on all the squeaking and crackling sounds I had before using it. I sprayed a silicon lubricant on the plastic rollers on the bottom as well.
2012 Fun finder Xtra XT-276, Pitbull strapless restraints
2016 GMC Sierra Denali HD Duramax/Allison 4wd
WERA Expert #826