ROBERTS® 6399 Firm Set Transitional Pressure Sensitive Adhesive is formulated for installation of resilient flooring including Luxury Vinyl Tile (LVT), Luxury Vinyl Plank (LVP), and Vinyl Composite Tile (VCT), as well as Carpet Tile. This is a very aggressive, high-tack transitional adhesive with superior shear strength and high resistance to lateral forces, making it ideal for heavy traffic, with great performance under rolling loads. ROBERTS 6399 installs like a pressure-sensitive adhesive, and firms as it cures to form a permanent bond. Used as a pressure sensitive adhesive, it has a 60 minute open time and a 12-hour working time. For semi-wet installation, it has a 20 minute open time and a 40 minute working time. Powered by Microban, this antimicrobial product protection helps fight the growth of stain and odor-causing bacteria that can cause product degradation. Easy to clean it dries clear, has high resistance to moisture with low odor and VOC (<1g/L). FloorScore and CRI Certified.