GNS S616 Building Sealant 1.Construction Grade Silicone Sealant 2.Neutral cure 3.Use for ACP, Stones, Metals, ... 68420Product DescriptionS616 is a one part neutral cure construction grade silicone sealant that easily extruded in any weather. It cures at ... e.g. vinyl windows, doors and perimeter joints.Surface like glass, aluminium, ceramics, metals, steel, fiberglass, most plastics, tiles, bricks, ...