Roberts 70-115 Moisture Barricade Underlayment, For Laminate Floors, 6 Mil. Thick Polyethylene Film, 120 Sq. Foot Roll Used with standard foam underlayments to protect against moisture 6 mil. thick polyethylene film for long life Roll unfolds to a 10 foot by 12 foot area Use with laminate flooring with pre-attached underlayment