Insul-Joint Backer Rod - All Thicknesses is a non-absorbent, compressible backup material designed to control sealant depth and create a backstop for proper sealant tooling. It’s the reliable choice for glazing, window and door applications, and a smart helper on expansion joints, curtain walls, partitions, and more. If you want a temporary joint seal that actually pretends to be helpful, this is it.

Key Features & Design

• Non-absorbent, compressible backup material inserted into a joint to control sealant depth, creating a backstop to allow proper sealant tooling.
• Can also be used as a temporary joint seal.
• Commonly used in glazing operation, window and door applications, expansion joints, curtain wall joints, partitions, log construction, pavement joints and repair, precast units and copings.
• Extruded, round, closed-cell, low density polyethylene foam material with a skin-like outer texture.
• Highly flexible and compressible for easy installation.
• Available in all thicknesses.