Product Overview
Flexible PEF (polyethylene foam) backing rod supplied in a 10mm x 50m small reel. Designed to control sealant depth and improve joint performance in construction, glazing, and waterproofing applications.
Key Features
- Controls correct joint depth for sealants
- Improves sealant performance and flexibility
- Closed-cell structure – water resistant, no absorption
- Prevents overuse of sealant (cost saving)
- Flexible and easy to install into joints
- Supplied in reel for convenient handling
PEF rods are specifically used to ensure sealant doesn’t fully fill a joint, allowing proper movement and durability.
Recommended Uses
- Expansion joints and movement joints
- Around windows, doors, and penetrations
- Precast concrete and masonry joints
- Sealing applications before silicone or sealant
Specifications
- Diameter: 10mm
- Length: 50m
- Material: Closed-cell polyethylene foam (PEF)
- Type: Backing rod (joint filler)

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