IPCO preformed end dams, inside and outside corners protect against moisture infiltration. The preformed corners eliminate the time-consuming and difficult cuts, folds, flaps, and patching required when creating corners on the jobsite. The flashing membrane overlaps the preformed corners, forming a continuous moisture barrier. It is available in 30- and 40-mil. self-adhesive rubberized asphalt, copper, or stainless steel. Illinois Products Corp. 800-383-8183. www.illinoisproducts.com