Alpha Pro Tech Engineered Products Inc. has launched its latest synthetic roof underlayment with the addition of REX TECHNO SB: a coated-woven polypropylene fabric that also has a non-woven polypropylene laminated to the top surface. The unique features include a multi-filament strand woven into the product that gives an additional slip-resistant feature. The non-woven fabric is treated so that moisture won’t stand on the top of the surface but will disappear, eliminating the fear of slippage. The rolls come 48 inches wide and 10 squares per roll. For more information, visit www.alphaprotech.com.