ProSL was developed for the Garage door industry to ensure that the Springs would never rust. Garage door springs don't wear out; the springs rust, the rust causes binding, binding causes fatigue, which shortens the life of the spring. ProSL's advanced formula pentrates between the coils of the spring, coats and protects the steel from corrosion even in salt air environments. ProSL has been proven to triple the life of garage door cables. ProSL's formula includes extreme pressure additives that keep the individual thread of the cables from binding up on themselves, extending life of the cable. First released in 2009, ProSL has not been sold in stores and has had no advertising including our web site. We are now selling close to 20,000 cans per year with word of mouth the only advertising.
ProSL has been proven in an ASTM B117 salt fog spray test to keep rust at bay for up to 2,700 hours. It's closest tested competitor lasted almost 250 hours.
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