Knauf Insulation. The EcoSeal System combines a spray-on, water-based air sealant with EcoBatt fiberglass insulation batts or JetStream blown-in insulation. EcoSeal dries to an impermeable elastic membrane that covers and seals tight gaps, cracks, and joints in the construction shell. EcoSeal exceeds Energy Star requirements for air leakage and has been tested for air infiltration by the NAHB Research Center. EcoBatt insulation contains 30% post-consumer recycled content, contains no formaldehyde or phenols, does not support microbial growth, and is certified to meet Greenguard Children & Schools standards. 800.825.4434. http://ecoseal.knaufinsulation.us.