BOARD FUND

What it is and why choose it

The Sika BOARD FUND is a cylindrical joint backer made of closed-cell polyethylene foam. It is designed as a complementary material for the installation of Sika sealants, helping to control joint depth and achieve an appropriate joint factor according to the characteristics of the sealant. Its light weight, low water absorption and resistance to most solvents and chemicals make it a practical and reliable solution for professional sealing works.

Main features

• Closed-cell polyethylene foam profiles for joint filling.
• Ideal complementary material to define and limit joint depth.
• Helps achieve the correct joint factor according to the sealant used.
• Lightweight and easy to handle and install.
• Good resistance to most solvents and chemical products.
• Low water absorption.
• Anti-adhesive complement to all Sika sealants, allowing them to work only horizontally, free of tension at the joint bottom.
• Thermo-weldable.
• Grey colour for easy visual control during application.

Technical specifications

Material and physical data

• Chemical composition: Closed-cell polyethylene foam.
• Density: ~35 kg/m³.
• Thermal stability: -40 °C to +60 °C.
• Appearance/Colour: Grey.

Available diameters and packaging

• Diameter 6 mm – Box content: 2,500 m (solid).
• Diameter 10 mm – Box content: 1,150 m (solid).
• Diameter 15 mm – Box content: 550 m (solid).
• Diameter 20 mm – Box content: 350 m (solid).
• Diameter 25 mm – Box content: 200 m (solid).
• Diameter 30 mm – Box content: 160 m (solid).
• Diameter 40 mm – Box content: 270 m (2 m solid strips).
• Diameter 50 mm – Box content: 180 m (2 m solid strips).

Storage conditions

• Storage temperature range: between -40 °C and +60 °C.

Applications and use cases

The Sika BOARD FUND is suitable as a complementary material to delimit joint depth and ensure the correct functioning of Sika sealants in multiple construction scenarios, including:

• Traditional masonry.
• Diaphragm walls.
• Heavy and light prefabricated elements.
• Pavement joints.

It can be used in combination with the following Sika sealants:

• Sikaflex
• Sikaflex AT
• SikaHyflex
• Sikasil
• Sanisil
• Sikacryl

Application details

• The selected diameter must be approximately 25% larger than the joint width to prevent the sealant from passing behind the backer rod when compacted and smoothed.
• Installation is carried out by laterally compressing the backer rod against the joint sides.
• The profile is inserted to the previously defined depth using a suitable auxiliary device, such as a T-shaped wooden tool.

All technical data in the product sheet are based on laboratory tests, and actual values may vary due to conditions beyond control.

FAQ

1. What is the Sika BOARD FUND made of?

It is made of closed-cell polyethylene foam.

2. What is the main function of this backer rod?

Its main function is to limit and control joint depth to obtain the correct joint factor and ensure proper performance of the sealant.

3. In which types of construction can it be used?

It can be used in traditional masonry, diaphragm walls, heavy or light prefabricated elements and pavement joints.

4. With which Sika sealants is it compatible?

It is a complementary and anti-adhesive material for Sika sealants such as Sikaflex, Sikaflex AT, SikaHyflex, Sikasil, Sanisil and Sikacryl.

5. Why should the diameter be larger than the joint width?

The diameter should be about 25% larger than the joint width to avoid the sealant passing behind the backer rod when it is compacted and smoothed.

6. What advantages does closed-cell foam offer?

Closed-cell foam provides low water absorption, good resistance to most solvents and chemicals, and effective control of joint geometry.

7. What is the colour of the product?

The product is grey.

8. Within what temperature range can it be stored?

It can be stored between -40 °C and +60 °C.

9. How is the product installed in the joint?

It is installed by lateral compression against the joint lips and inserted to the required depth using a suitable auxiliary tool, such as a T-shaped wooden device.

10. Are the technical values guaranteed in all conditions?

No. The values are based on laboratory tests and may vary due to real on-site conditions beyond control.

Section 14 – Transport information

Consultar ficha técnica del fabricante.

Section 8 – Individual protection measures

Consultar ficha técnica del fabricante.

Contenido generado por IA