Carlisle's RapidLock (RL) Roofing System is a revolutionary membrane attachment method that provides a fully adhered system without the use of adhesives. RapidLock is a hook and loop attachment system powered by VELCRO® Brand Securable Solutions. Carlisle's insulation boards act as the hook while the FleeceBACK membranes act as the loop, creating the industry's first adhesive less, fully-adhered attachment system. Carlisle's SecurShield HD RapidLock Polyiso is a rigid roof insulation panel composed of a high-density, closed-cell polyisocyanurate foam core laminated to a premium-performance, coated glass mat facer (CGF). RapidLock provides a fully-adhered roofing system without VOCs or installation temperature restrictions.