Originally Posted by BrandonV
Polycarbonate and clear polystyrene plastic are among the few surfaces on which to avoid using a petroleum-based product like WD-40 Multi-Use Product.
I'm not sure what the RB risers are made of, also the wiper seals, but I've been using it for 25 years in new installs where we had sticking riser problems. All the sites were in beachfront/sandbased soils. I would have noticed failures, never did. I use WD-40 all over the motor home, which has ABS fairings and vinyl and rubber trim strips. The only thing I could add to this dead horse thread, is we did have problems with the RB risers not ratcheting, some were smooth, some not, go figure.