Insul-Joint Expansion Joint 1/4 In Gray is a reliable, closed-cell polyethylene expansion joint filler that helps concrete breathe without cracking. It’s built for pros and DIYers who want professional-grade results with minimal drama.

Insul-Joint is a closed cell (non-crosslink) polyethylene expansion joint filler designed to prevent cracks and breaks during concrete expansion and contraction.

Insul-Joint can be used in all standard concrete construction, such as floor slabs, driveways, sidewalks, parking garages, highways and runways.

Key Features & Design

• Size & Color: 1/4 in, Gray
• Material: closed cell polyethylene foam (non-crosslink); extruded from high quality closed cell polyethylene foam
• Overview: Insul-Joint is a closed cell (non-crosslink) polyethylene expansion joint filler designed to prevent cracks and breaks during concrete expansion and contraction.
• Applications: Insul-Joint can be used in all standard concrete construction, such as floor slabs, driveways, sidewalks, parking garages, highways and runways
• Technical Specifications: Technical Specification: ASTM D 4819 Standard Specification for Flexible Cellular Materials Made From Polyolefin Plastics. ASTM D 545 Standard Test Methods for Preformed Expansion Joint Fillers for Concrete Construction (Nonextruding and Resilient Types). ASTM D 3575 Standard Test Methods for Flexible Cellular Materials Made From Olefin Polymers.

For projects that demand durable expansion control, Insul-Joint delivers dependable resilience and easy installation, keeping concrete moving smoothly from pour to performance.