POLYFIL H is a foaming agent specifically designed for use with high-density polyethylene (HDPE), polystyrenes (PS), polypropylenes (PP), low-density polyethylene (LDPE), and linear low density polyethylene (LLDPE) as compatible polymers and resins. It is suitable for extrusion processing methods and is carried by low-density polyethylene (LDPE) in a resin-based formulation, making it ideal for various foaming applications in the plastics industry.