The Ez-Tex backer sprayer from Benron is the first and only hopper gun that can spray 3/4" (19mm) glass fibers at 3% loading for GFRC backer coat: quickly, easily and affordably. It also sprays mist coat with the included second nozzle. This sprayer slashes the time needed to apply backer, and it's easy to use and easy to clean. At just $395, this is a no-brainer tool for any GFRC concrete countertop pro to have. Buy here: www.ConcreteCountertopInstitute.com/BackerSprayer.