Back to Nature Exterior Encapsulant has been specifically formulated to provide a remarkably sound and sturdy barrier between lead based paint and the environment. This is non-flammable, non-toxic, water based systems are environmentally safe and user friendly. It has superior adhesion and results in an extremely durable yet flexible coating that is virtually shatterproof and impenetrable. As a result it gives long term protection (20 year warranty). ASTM Tested. Coverage at 8 mils dry is typically twice that of elastomeric encapsulants.