Mylar Possesses many desirable properties including gas and moisture resistance, chemical stability, high tensile strength, and when laminated to aluminum foil, Mylar provides a high puncture resistance than any metalized polyester film. Mylar foil will refelct infrared radiation, will stop wind and will block moist. Mylar is reinforced aluminium foil insulation matererial. The mylar is durable and can be attached easily to any surface. The roll does not include any adhesive backing so it is highly recommended to use heat resistant duct tape to attach the mylar to the desired areas.