What Is PVC Foam Board?

PVC foam board, also known as expanded PVC or Sintra board, is a lightweight, rigid sheet made from PVC through a foaming process. Its closed-cell structure makes it waterproof, flame-retardant, and resistant to chemicals and corrosion.

The material is easy to cut, drill, glue, and print on, which makes it popular for many uses. Common applications include advertising signs, exhibition displays, wall cladding, bathroom partitions, and cabinet backing.

When buying PVC foam board, check the density for better screw-holding strength and look for a smooth, clean surface. For indoor use, lead-free eco-friendly options are recommended. Thanks to its low cost and good performance, PVC foam board is now a common alternative to plywood and metal sheets in many lightweight projects.