Polystyrene tubes and block-outs are lightweight expanded polystyrene (EPS) foam forms designed to create accurate voids, bolt pockets and pipe penetrations in wet concrete before it sets. They are a practical solution for construction and concrete applications where a clean, controlled opening or recess is required.

Easy to position and lightweight to handle, EPS block-outs can be installed in formwork before concrete is poured. Once the concrete has cured, the foam can typically be removed to leave the required void, subject to the project design and specifications.

Key Features & Benefits

• Lightweight expanded polystyrene (EPS) construction

• Designed to create precise concrete voids and block-outs

• Suitable for bolt pockets, anchor bolts and pipe penetrations

• Easy to position and secure within formwork

• Cylindrical tubes available for creating consistent bolt pockets

• Can provide clearance around structural bolts for installation and adjustment

• Easy to remove after concrete has cured

• Suitable for a range of concrete construction and formwork applications

• Helps create clean, consistent openings without complicated formwork

How Polystyrene Block-Outs Work

Void Creation:
Polystyrene forms are positioned within the formwork before concrete is poured. The EPS prevents concrete from filling the designated area, creating a void for bolts, pipes, services or other construction requirements.

Bolt Pockets & Anchor Bolts:
EPS tubes can be used to create cylindrical pockets around anchor bolts. The additional space can provide room for positioning, installation and adjustment of structural components where required by the project design.

Simple Removal:
After the concrete has cured, EPS foam block-outs can generally be broken out or removed from the finished concrete. Removal methods should be selected according to the specific application and project requirements.

Applications

Polystyrene tubes and block-outs are commonly used for:

• Anchor bolt pockets

• Structural steel installation

• Machinery and equipment foundations

• Pipe penetrations

• Service penetrations

• Concrete slabs and footings

• Columns and structural elements

• General concrete formwork and void creation

Product Information

Material: Expanded Polystyrene (EPS)
Product Type: Polystyrene tubes and concrete block-outs
Application: Concrete voids, bolt pockets and penetrations
Installation: Positioned within formwork before concrete placement
Removal: Designed for practical removal after concrete curing, where required

Always select the appropriate size and configuration for your application and follow relevant engineering specifications, construction requirements and manufacturer recommendations.