Primers and Activators Gorilla 696 Surface Activator 500ml 500ml 19389 & 5L 19392, transparent Easy to use cleaner & primer Use on non-porous surfaces Suitable for silicone, polyurethane & hybrid sealants Gorilla Primer 150 500ml, clear, 20057 Liquid, easy application Suitable for silicones & MS Polymer based sealants & adhesives Gorilla Silicone Spray 400ml, clear, 21611 Lubricates & water repellent