... freezing, anti-moisture, noise-resistant and heat insulation. Polyurethane Foam 1, factory direct sell, professional manufacturer2, soft, good ... to “blow holes” due to the foaming process.Polyester Foam - Mainly of improved physical properties, and controlled cell ... compression set (collapse), high resiliency, good vibration damping and impact absorption. Similar to Poron™ grades. Typical Uses:Gaskets ...