The neutral silicone use a special low viscocity silica liquid to archive a flowable, self leveling liquid silicone sealant. 

The self leveling silicone are construction grade sealant, used for sealing cracks and joints in horizontal surfaces, benefit the silicone has good adhesion to most material include metals, glass, most woods, ceramics and various plastics, the self leveling silicone more and more use for repair RV and other viechles' roof.