Husssh! Superior Acoustic Pad Underlayment IIC 72 Stc 70 Rating Shop now for great prices and deals on flooring underlayments in a variety of thickness, FIIC, IIC, STC Sound ratings with vapor barriers ideal for use over any subfloor in residential and commercial spaces. Visit Squarefoot Flooring, your trusted flooring underlayment store retailer near me, proudly serving Mississauga, Barrie, Toronto, Oakville, Niagara Falls, Brampton, Newmarket, Burlington, Hamilton, Guelph, Ontario, and all of Canada. Category: Flooring Underlayments. Brand: Naf Flooring. SKU: 90528.