Betorod

Betorod is a closed-cell extruded polyethylene foam backer rod. It acts as a joint packing backing to control the depth of elastomeric sealants and prevent three-sided adhesion.

Product Overview

Closed-Cell Betorod belongs to the Sealants & Joint Treatment family. It is intended for façade joints, floor joints, roof and wet-area joints and precast and infrastructure joints. Final product selection must account for substrate condition, exposure, application method and compatibility with adjoining layers. Betorod is a closed-cell extruded polyethylene foam backer rod. It acts as a joint packing backing to control the depth of elastomeric sealants and prevent three-sided adhesion.

Best-fit Applications

• Façade joints
• Floor joints
• Roof and wet-area joints
• Precast and infrastructure joints

Technical Benefits

• Controls sealant depth
• Supports two-sided sealant adhesion
• Available in sizes matched to joint width

Technical & Performance Specifications

Physical Property	Declared Performance Value	Test Standard
Appearance	Extruded white/grey foam rod	Visual
Density	25 - 35 kg/m³	ASTM D1622
Water Absorption	Nil (Closed-cell)	ASTM C272
Tensile Strength	> 200 kPa	ASTM D3575
Service Temperature Range	-40°C to +70°C	-

Technical Datasheet Locked

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Application Guidelines & Installation Method

Step 1: For sealants, clean and dry the joint; apply primer where required; install the specified backer rod to the correct depth; apply continuously without air gaps; tool to a smooth finish; then allow adequate curing and protect from water, traffic and damage.

Step 2: Install filler boards accurately at movement joints and prevent displacement during concrete works.

Step 3: Install backing rods continuously at the specified depth, without gaps or stretching, using the correct size to prevent three-sided adhesion.

Standard Compliance

Conforms to ASTM, BS EN, and local municipality green building regulations. Verified through independent laboratory testing and certified project listings.