Since 1991, HPI Products has been providing innovative construction solutions as a leading manufacturer of expansion joints, backer rod and more. Our products utilize foam of various types such as polyethylene foam, polyurethane foam, open cell foam, and closed cell foam. We offer quality products like our PolyStrip® and PolyJoint® along with excellent customer service to all our clients.
Closed cell foam is a type of foam where the “cells” are tightly pressed together and enclosed, contrasting with the open, traditional polyurethane foam variation or interconnected cells of the open cell...
Polyethylene foam is a valuable closed-cell thermoplastic foam material. A closed-cell foam consists of tiny dense cells enclosed by its walls. The cells sit close to each other, but they are not interconnected. Hence, closed-cell foams like...
Polyurethane foam is a porous, cellular-structured, synthetic material made from the reaction of polyols and diisocyanates. Its structure is a composite of a solid phase and a gas phase. The solid phase is made from...
