I saw a review of a GoLite product recently on BackpackGearTest that said:

"The shelter is made of SilLite silicone-impregnated ripstop nylon. SilLite is touted by GoLite to have a much higher tear strength than urethane-coated nylon which is alleged to give SilLite "extra-ordinary strength-to-weight ratios." Additionally, SilLite is not supposed to "wet-out" like urethane-coated nylon."

Does anyone know anything specific about SilLite™ vs. the common silnylon we use here for our tarps? Is there any difference at all that would account for the trademark?