Best Waterproof Underlayments

400Sqft AMERIQUE Premium 3 Mm Thick Flooring Underlayment Padding with Tape & Vapor Barrier 3 in 1 Heavy Duty Foam (400SF Total, 200SF/Roll), 400 Sq.'., Royal Blue (Pack of 2)

Vivlly1/8” Uncoupling Membrane for Tile, Stone, Concrete, Shower Walls, Bathroom Flooring, Waterproof Floor Underlayment Mat, Anti-Fracture Crack Isolation, 108 sq. ft. - 3.3 ft x 32.8 ft

Whitecap Dimple Drainage Matting, 4' x 50' - Improves Water Movement and Drainage - Waterproof Moisture Barrier Foundation Wrap and Floor Underlayment - Sub Floor Waterproof Membrane

Bestlaminate Blue Vapor 3-in-1 Flooring Underlayment Bundle - 500sf - 5 Rolls

FLOORLOT GoldMax Premium Floor Underlayment - 200 sqft Roll - 3mm Thick - with Moisture Barrier

QuietWalk Laminate and Floating Wood Flooring Underlayment with Attached Vapor Barrier- Sound Reduction, Compression Resistant, Moisture Protection 3'Wx33'4"L Roll (Covers 100 sq. ft) QW100B1LT

ROBERTS 70-115 Moisture Barricade Underlayment Film, for Vinyl, Laminate SPC, Engineered Wood Floors, 6 mil. Thick, Polyethylene, 120 Sq. Foot Roll, Black

BECHAEO Waterproof Membrane for Shower 3.3 FT x 98.5 FT 324 SQ FT 20mil Waterproofing Membrane Tile Underlayment Polyethylene Fabric Roll for Bathroom Wall Floor

DuPont Roof Protector Roofing Underlayment Roll - 42" x 286'

FLOORLOT BlueStep Underlayment with Moisture Barrier for Laminate and Wood Floors, (200 sq.ft Roll)