MEGASEAL CORD is a closed-cell polyethylene foam backing rod designed to support sealants in expansion and construction joints. Available in various diameters, it provides a firm, flexible base that helps maintain proper joint dimensions and prevent three-sided adhesion. MEGASEAL CORD is highly resistant to moisture absorption, weathering, and deterioration, ensuring long-term performance in internal and external joints. Easy to handle and install, it is essential for high-quality joint sealing across construction, civil engineering, and facade applications. It also improves joint movement capacity and reduces sealant strain, prolonging the service life of the sealed joint.
Megaseal Cord is pressed into a clean joint at the depth needed for the sealant, sized slightly larger than the joint width so it stays in compression.
Summary of the method in the Megaseal Cord Technical Data Sheet. Always follow the full TDS on site.
The diameter of Megaseal Cord is recommended to be approximately 20 to 25% larger than the joint width. It is available in 10 mm, 20 mm, 25 mm and 30 mm diameters.
Megaseal Cord is supplied in 50 linear meter rolls, in white or grey.
Megaseal Cord has a temperature resistance of -20°C to +80°C, with UV resistance of 5 years and nil water absorption.
It supports sealants in expansion joints in walls and floors, horizontal paving and traffic bearing joints, facade panel joints, isolation and masonry control joints, around pipes and ducts, precast panels, and window and door frames.
Megaseal Cord has a shelf life of 5 years if stored in a temperature controlled warehouse, away from direct sunlight in dry conditions.
