35 Years of building applications and testing, confirm SIL-ACT^®‘s unsurpassed protection. Advanced Chemical Technologies (ACT) is the leader and innovator in silane technology. SIL-ACT^® has been used to treat hundreds of buildings worldwide. When specifying water repellents for your next building project, whether it is a low VOC or LEED compliant, specify the industry leader, Advanced Chemical Technologies, Inc.