Square-section open-cell backing rod for square and rectangular joints. It sits in the base of the joint to set the sealant depth and stop three-sided adhesion, which is what cracks beads.
Open cell structure lets gas out, so the sealant cures without bubbling from the back. Firm medium density holds its shape while you tool the bead over it.
Frequently Asked Questions About Square Open Cell Backing Rod
Q: How do I choose the correct size of square backing rod?
A: Select a backing rod that is approximately 25% larger than the joint width and matches the square profile. This ensures it stays in place and provides the correct depth for the sealant.
Q: Is the square backing rod compatible with all sealants?
A: Yes, Square Open Cell Backing Rod is compatible with a wide range of sealants, including acrylic, silicone, polyurethane, and hot pour types.
Q: What is the benefit of using a square backing rod?
A: Square backing rods maintain a consistent shape for uniform sealant application in square or rectangular joints.
Q: Can this backing rod be used in swimming pools?
A: It is not recommended for internal swimming pool applications due to potential exposure to high levels of chlorine.
Q: How should I store this square backing rod?
A: Store it in a cool, dry place between 10°C and 35°C, away from direct sunlight, to maintain its quality and performance.
Square Open Cell Backing Rod can be used on the following substrates:
- Masonry, Brick, Stone Porcelain
- Metal, Aluminium
- Timber
- Plastics, Fibreglass
- Painted surfaces
- Rubber
- Powder coat
- Waterproof membranes.