TRUEFOAM 1-1/2" x 4' x 4' Insulworks Floor Insulation, for 1/2" Tube

Easy installation allows you to reduce your project costs because there's no need to purchase and install wire mesh, the tube is simply "stepped" into the panels - Great for slab-on-grade, sandwich slab applications and snow melt systems - above ground, underground or under concrete structures - Strong enough to support the weight of cast-in-place concrete, construction activity, working loads, machinery and heavy vehicle loading where the concrete slab has been designed for such purposes - Made from Type 2 Expanded Polystyrene (EPS), a high-density closed-cell foam
100% recyclable and doesn't contain any harmful HFCs, CFCs or HCFCs and it has long-term stability