High Density Polyurethane Foam spray in Coimbatore Boss 333 is a ready-to-use, multi-purpose, polyurethane foam spray that expands to three times its original volume on contact with air. The expanding action fills holes, cracks and gaps more completely than standard caulks. Boss 333 has excellent insulting properties and adhesion to virtually all building materials.PU Foam Spray in coimbatore PU Foam spray in coimbatore, PU Foam spray in Chennai, PU Foam Spray in Erode, PU foam spray in Salem, PU foam spray in bangalore