Primers are used to prepare roof substrates and improve adhesion for liquid applied waterproofing membranes. Using the correct primer is an important part of the system installation, helping to ensure reliable adhesion between the liquid applied membrane and the substrate. Sika's range of primers are engineered for compatibility with Sikalastic® waterproofing systems and a variety of roof surfaces, providing a proven solution for substrate preparation on both new build and refurbishment projects.