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PE Foam Backer Strip

Diameter: Ø8 / Ø20
Length: 280 m

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Closed-Cell Polyethylene (PE)
Material Type
6mm – 50mm
Diameter Range
25–35 kg/m³
Density
≤0.02 g/cm³
Water Absorption
-40°C to +70°C
Service Temperature

Introduction

High-Performance Joint Filler

Our PE Foam Strips are engineered as high-quality backer rods for curtain wall engineering and expansion joints. Designed with a closed-cell structure, they provide a non-adherent surface that controls sealant depth and prevents the common failure of three-sided adhesion.

Benefits

Why Choose APEX Foam Strips

Superior Three-Sided Adhesion Prevention

Acts as a bond breaker to ensure sealant only adheres to the joint flanks, allowing for proper movement and elasticity.
Excellent Moisture and Water Resistance

The closed-cell polyethylene construction prevents water absorption, protecting the internal facade structure from corrosion.
Highly Compressible and Flexible

Easily conforms to irregular joint shapes and sizes, ensuring a snug fit and consistent support for the sealant bead.
Chemically Inert and Compatible

Compatible with all cold-applied sealants, including silicone, polyurethane, and polysulfide, without causing discoloration.

Standard

Customization and Material Standards

Available in a wide variety of diameters ranging from 6mm to 50mm to accommodate different curtain wall joint widths and expansion requirements.

Supplied in continuous rolls or specific cut lengths, our foam strips meet international standards for weatherproofing consumables in commercial facade applications.

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Applications

Related Applications

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FAQS

Frequently Asked Questions

Common technical inquiries regarding the application and selection of foam backer strips for facade projects.

Why is a closed-cell structure important?

It prevents the strip from absorbing water and ensures it does not outgas when the sealant is applied, avoiding bubbles in the joint.

How do I choose the correct diameter?

The foam strip should be approximately 25% larger than the joint width to ensure it stays firmly in place during sealant application.

Can these be used with structural silicone?

Yes, they are chemically compatible with structural and weather-sealing silicones used in curtain wall systems.

What is the primary function of the foam strip?

It controls the depth of the sealant and acts as a backstop to allow for proper tooling and joint geometry.

Does it provide any thermal insulation?

While its primary role is joint backing, the PE material does offer minor thermal resistance within the joint gap.

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