[rohrmann]

Honestly, you can use all the sprays, foams, and powders, but nothing will stop the sun from damaging the rubber in the slide seals. I have replaced slides seals on our rig probably four times in the years we have owned it, and this isn't just the flap type seals but also the bulb seals. The sun eventually turns the rubber to mush and replacement is the only solution. My take on all those treatments is they are just another way to suck money out of your wallet.