Insulayment 100 sq ft Premium 3 mm Flooring Underlayment Garden Hose Fittings PRO MARK Rustic Blend 2 mm Item Weight:3.507 PRO MARK Rustic Blend 2 mm Waterproof LVP Flooring (35 Ace Semi Gloss Interior Cabinet & Trim Paint allows excellent adhesion with wood flooring adhesives and thin set mortars Dampens ambient sound 100% Recycled textile fibers Sound Absorption Insulayment's filaments are randomly air laid creating a capillary affect to cushion the floor but flexible enough to form around sub floor surface roughness that may otherwise cause laminate panels to "rock" or lay unevenly Approved for in floor heating systems the patented process used to make Insulayment creates a three dimensional fiber matrix that allows heat to permeate evenly while helping to protect the floor covering material from thermal shock Insulayment adds a thermal "break" to flooring assembly with an r value of approximately 0