Waterproofing plays a critical role in tunnels, bridges, and underground structures exposed to moisture and hydrostatic pressure.
Inadequate protection can lead to water ingress, structural deterioration, and increased long-term maintenance costs.
Inadequate protection can lead to water ingress, structural deterioration, and increased long-term maintenance costs.
Waterproofing Solutions for Tunnels, Bridges, and Underground Projects
We supply waterproofing coatings and sealants for infrastructure projects, including tunnels, bridges, and underground structures. Our waterproofing solution includes polyurethane waterproofing coatings and water-swellable sealants.
No Exposed Polyurethane Waterproofing Coating (TW331)
TW331 is a high-solids, oil-based polyurethane waterproofing coating designed for concealed applications. Upon curing, it forms a continuous, seamless, and high-strength waterproofing membrane.
Performance Advantages:
- Excellent Elongation: Possesses superior tensile and tear strength, offering exceptional resistance to cracking and structural movement.
- High Bond Strength: Primerless adhesion to concrete and common substrates
- High Solids Content & Low Shrinkage: Forms a thick, robust film with outstanding resistance to aging and water exposure.
- Customizable Colors: Available in custom colors to meet specific on-site identification and construction management requirements.
Typical Applications
- Structural waterproofing for bridge decks.
- Waterproofing for tunnel linings, basement floor slabs, and retaining walls.
- Waterproofing systems for concealed roofing structures.
Water-Swellable Polyurethane Sealant
TP640-220/400 water-swellable polyurethane sealant is designed for effective sealing in underground and water-exposed structures. It employs a dual-mechanism waterproofing system: providing both elastic rubber-like sealing and active water-blocking through expansion upon contact with water. Furthermore, it cures effectively even on damp substrates.
Performance Advantages:
- Dual-Action Water Sealing for Enhanced Reliability: Combines elastic sealing with volumetric expansion to withstand water pressures of up to 2.5 MPa.
- High Expansion Performance: Two selectable expansion levels (220% / 400%); maintains an expansion retention rate of ≥90% even after prolonged immersion in water.
- Convenient Application: Single-component, ready-to-use formula; easily applied using a standard caulking gun; adheres firmly to both dry and wet substrates.
- High Strength & High Elongation: Features high tensile strength and excellent elongation at break, allowing it to effectively accommodate structural movements and displacements.
- Eco-friendly & Safe: Low VOC content and free of unbound TDI; suitable for use in environments involving contact with potable water.
- Competitive Cost: Delivers superior performance compared to traditional water-stopping sealants and waterstops, resulting in lower overall project costs.
Typical Applications
- Railway and highway tunnels, urban subway systems, and underground utility corridors.
- Waterproofing of concrete construction joints in basements, sewage treatment tanks, and similar structures.
- Sealing and waterproofing around embedded pipes, wall-penetrating rebar, pile heads, and steel structural components.
Infrastructure Waterproofing Solutions
Tunnel Waterproofing Systems
- Structural Waterproofing: Non-exposed polyurethane waterproofing coatings form a seamless, highly elastic membrane that resists water pressure and prevents leakage.
- Joint Sealing: Designed for construction joints, segment joints, and pipe penetrations, the water-expandable polyurethane sealant expands when exposed to water to block leakage at the source.
Bridge Waterproofing Systems
- Bridge Deck Waterproofing: Non-exposed polyurethane waterproofing coatings deliver high strength, flexibility, and corrosion resistance, protecting concrete decks and steel reinforcement from water damage.
- Expansion/Construction Joint Sealing: Water-expandable polyurethane sealants accommodate structural movement while preventing rainwater infiltration, reducing the risk of corrosion and leakage.
Underground Waterproofing Systems
- Base Slab / Side Wall Primary Waterproofing: Non-exposed polyurethane waterproofing coating—featuring high solids content, strong adhesion, resistance to water pressure, and crack-free performance.
- Construction Joints and Wall Penetration Points: Expands on water contact to form a long-lasting barrier that resists continuous water exposure and prevents leakage.
Are you a builder, contractor, or developer seeking high-quality waterproofing materials for your construction projects? We offer comprehensive, large-scale waterproofing solutions.
We provide bulk inventory supply, project-specific customization, and technical support services. Request bulk pricing and customized waterproofing solutions.