EPE Backing Rod

EPE Backing Rod – Closed Cell Polyethylene Foam

Our EPE backing rod is a flexible, closed-cell polyethylene foam used to fill joints and gaps before applying sealant. It acts as a bond breaker and controls the depth of sealant, preventing three-sided adhesion and reducing material waste.

Perfect for construction, caulking, tiling, glazing, waterproofing, and joint sealing, this backing rod is lightweight, moisture-resistant, and easy to install.

Common Applications:

• Expansion joints in concrete and brickwork
• Pre-sealant filler between door/window frames and walls
• Wall-to-floor joints in bathrooms and wet areas
• Tiling, caulking, waterproofing and glazing
• Commercial, civil and residential construction

Available Diameters:

• 10mm
• 13mm
• 15mm
• 20mm
• 25mm
• 30mm
• 40mm

All rolls are 50 metres long
Bulk and trade pricing available on request.

Product Benefits:

• Closed-cell EPE foam – does not absorb water
• Compressible, flexible, and easy to work with
• Reduces sealant usage and prevents 3-point adhesion
• Suitable for interior and exterior use
• Compatible with silicone, polyurethane & hybrid sealants

Technical Specifications:

• Density: 2.40 – 2.60 PCF (3.85 – 4.18 g/m³)
• Deflection: 4 PSI @ 25% compression
• Water absorption: 0.002% by volume
• Temperature range: -67°C to +98°C

Proudly shipped Australia-wide
Ideal for builders, tradies, waterproofers, and serious DIYers.

Also see our range of commercial foam products.