Mylar is reinforced aluminium foil insulation material. 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.
Mylar does not insulate heat but can act as a waterpoof membrane on tiles and walls. Mylar reflects 98% of light, making ideal for maximising the light in your grow room.