Expansion Joint Waterproofing is a specialized system designed to seal and protect expansion joints in concrete structures from water ingress, debris, and environmental damage.
Expansion joints are designed gaps in roofs, bridges, walls, podiums, and floors that allow for thermal movement, shrinkage, and structural deflection. Proper waterproofing of these joints prevents water penetration, protecting reinforcement, concrete, and the overall structure from corrosion, deterioration, and structural damage.
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The EPDM waterproofing system is engineered to:
Prevent water leakage through moving joints
Accommodate thermal expansion, contraction, and structural movement
Protect reinforcement and concrete from corrosion
Provide a durable, elastic, and watertight seal between structural elements
Ensure long-term performance under dynamic movement
The system creates a flexible, watertight barrier over expansion gaps:
Sealants or elastomeric strips accommodate compression, extension, and shear movements while blocking water passage.
Pre-formed elastomeric strips can be bonded or mechanically fixed and topped with protective sealant.
In high-traffic or roof applications, metal covers with embedded elastomer provide both mechanical protection and waterproofing.
Sealant Method:
Elastomeric Strip Method:
Verify joint preparation and primer coverage
Check sealant depth and width per design
Ensure continuous bead or full elastomer contact.
Conduct water spray or ponding tests after curing
Monitor movement capacity to confirm sealant accommodates expansion and contraction
Roofs, terraces, and podium decks
Expansion joints in parking decks and slabs
Bridges and flyovers
Basements and retaining walls
Water tanks and swimming pools
Industrial floors with structural gaps
The Expansion Joint Waterproofing System offers a flexible, durable, and watertight solution for structural gaps in buildings and civil structures.
Using polyurethane or silicone sealants, pre-formed elastomeric strips, and optional protective covers, this system ensures long-term performance, accommodates structural movement, and prevents water ingress, protecting both concrete and reinforcement.
Proper design, joint preparation, and skilled installation are critical for achieving a successful expansion joint waterproofing system that maintains structural integrity and longevity.
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Ofixo Tech’s expansion joint waterproofing system is a specialized, durable, and elastic sealing solution designed to prevent water ingress and protect structural gaps in concrete structures.
The main purpose is to prevent water leakage through the moving joint, which protects the internal structure.
Expansion joints requiring waterproofing are typically found in structures exposed to weather or water.
The key functions are to prevent water leakage, accommodate thermal expansion, contraction, and more.
The system utilizes flexible components, such as elastomeric strips or high-performance sealants, that can compress, extend, and handle shear movements.
Common materials include high-performance polyurethane (PU) or silicone sealants, pre-formed elastomeric strips, PU adhesives, and more.
The backer rod is installed in deep or wide joints to control the depth of the applied sealant and to provide support for movement accommodation.
Surface preparation is crucial because it ensures proper adhesion of the sealant or strip, preventing bond failure and premature system failure.
The system offers superior flexibility, long-term UV/ozone resistance, compatibility with various construction materials (cementitious, membrane systems), and proven durability.
Yes, the expansion joint waterproofing system is suitable for basements, water tanks, and swimming pools where structural movement occurs.
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