Haven't heard about that stuff but bunk glides work great, although more money.
You won't have to worry again after they're installed.
http://www.cabelas.com/product/Boating/Boating-Trailer-Accessories/Guide-Ons-Bunks|/pc/104794380/c/104781780/sc/104366880/E-Z-Slide-Trailer-Pads/737191.uts?destination=%2Fcatalog%2Fbrowse%2Fguide-ons-bunks%2F_%2FN-1100650%2FNs-CATEGORY_SEQ_104366880%3FWTz_l%3DSBC%25253BMMcat104794380%253Bcat104781780&WTz_l=SBC%253BMMcat104794380%3Bcat104781780%3Bcat104366880