Add to Cart Premium Underlayment for Laminate, Hardwood, and Engineered Floors FloorMuffler MSRP: Now: $62.95 Was: FloorMuffler UltraSeal flooring underlayment is a Premium Grade cross-linked polypropylene foam with UltraSeal self-sealing lip and tape system. FloorMuffler UltraSeal is the ideal choice for most... MSRP: Now: $62.95 Was: Add to Cart