3M 320 silicone 310ml It is used in works involving all kinds of building and construction fasteners, it is used with the continuation of polycarbonate and polyacrylate elements, it provides connection between treated wood and glass surfaces, PVC and glass elements and high-end movable construction components. 3M™ 320 silicone neutral for general parts. Silicone polymer high quality, neutral, elastic putty. It is easy to apply, resistant to infrared rays, remains flexible after curing and has many types of durability.