1. Core Features
(1) Premium Material & Superior Performance
Adopting high-quality flexible PVC composite (free of reclaimed materials), the product meets strict industry performance benchmarks, with key indicators validated by authoritative testing :
- Mechanical Strength: Tensile strength ≥12MPa (up to 15MPa for high-grade batches), elongation at break ≥300%, and tear strength ≥25kN/m—ensuring resistance to tearing during concrete pouring and structural deformation .
- Temperature Adaptability: Operating range of -38℃ to 65℃, with brittle temperature ≤-38℃ (passes low-temperature brittleness tests per ASTM D-746) . It withstands cold plateaus’ freezing conditions and coastal areas’ high temperatures without cracking or brittleness.
- Environmental Resistance: Water absorption rate ≤0.5% (even as low as 0.15% for high-grade batches), maintaining stability in long-term submerged environments . It resists erosion from weak acids (pH 3-10), alkalis, municipal sewage, and metal salts, suitable for sewage treatment plants and coastal projects .
- Aging Durability: After 70℃×240h hot air aging, tensile strength retention ≥95% and elongation at break retention ≥280%, ensuring a service life of over 35 years in underground or shaded environments . It also exhibits excellent ozone resistance (no failure per ASTM D-1149) and alkali resistance (weight change ≤±0.25% in 20% alkali liquor) .
(2) Specialized C-Shaped Structure for Wide Coverage
The 310mm width (tolerance: ±9.0mm for standard batches) optimizes coverage for large joints, eliminating waterproof blind spots while avoiding material waste—ideal for concrete structures where the waterstop width must be at least 6 times the largest aggregate size . The C-type profile (standard thickness: 6.0±0.5mm, customizable to 8-10mm) features three functional components :
- Curved Elastic Core: The C-shaped central body absorbs horizontal and vertical displacement up to 20mm, effectively adapting to concrete expansion and contraction—far more flexible than flat waterstops . It can accommodate lateral and transverse movements, making it suitable for dynamic joints .
- Reinforced Bonding Flanges: 7-9mm thick flanges with diamond-shaped anti-skid ribs (height ≥12mm) to increase bonding force with concrete by 40% compared to smooth surfaces . Pre-punched stainless steel eyelets (optional) enable secure fixing to steel reinforcement, preventing displacement during concrete pouring .
- Balanced Hardness: Shore A hardness of 72±5 (≥65 minimum), striking a perfect balance between rigidity for stable positioning during construction and flexibility for deformation absorption after concrete hardening .
(3) Rigorous Quality Compliance
- Meets international and industry standards, with each batch undergoing third-party testing for hardness, tensile strength, low-temperature flexibility, and aging resistance—achieving a 100% qualification rate .
- Passes hydrostatic pressure resistance tests, effectively blocking high water pressure (≤0.8MPa) penetration—suitable for deep basements, reservoirs, and tunnels .
- Weldable via hot-melt technology (welding temperature 140-160℃), enabling seamless on-site joints that maintain the same waterproof performance as the main body .
2. Application Scenarios
Ideal for large-joint waterproofing in high-demand concrete structures :
- Water Conservancy Projects: Medium-sized reservoirs, irrigation canals, culverts, and dam auxiliary structure joints—resistant to long-term submerged environments and irrigation water erosion .
- Municipal Engineering: Underground utility tunnels, large rainwater regulation tanks, subway station main structure joints, and underground car park expansion seams (paired with split formwork for optimal installation) .
- Civil Construction: Super high-rise building basements, retaining walls, and prefabricated concrete component large joints—adapting to structural settlement and temperature-induced displacement .
- Special Facilities: Large sewage treatment pools, industrial storage tanks (≤300m³), and tunnel construction joints—withstanding chemical corrosion and high hydrostatic pressure .
3. Installation & Advantages
(1) Efficient Construction & Compatibility
- Simplified Fixing: Pre-punched eyelets in flanges allow quick attachment to steel reinforcement with tie wires, or direct pressing with split formwork—ensuring the C-shaped core is centered in the joint to maximize displacement absorption .
- Easy On-Site Welding: Butt joints are seamlessly welded using a thermostatically controlled welding iron (240V). Factory-welded L/T-shaped pieces are available to reduce on-site workload and ensure joint reliability .
- Concrete Compatibility: Works with all standard concrete mixes, with sealing performance activating immediately after concrete hardening—no additional curing time required . The 310mm width ensures compatibility with concrete thicknesses commonly used in large structures .
(2) Cost-Effective & Low Maintenance
- Material Efficiency: The 310mm width reduces waste by 15% compared to 350mm-wide alternatives for large joints, lowering material costs . Customizable lengths (20-25m standard) minimize leftover waste for project-specific needs .
- Minimal Maintenance: The durable PVC material and reliable bonding with concrete minimize repair needs. If leakage occurs, local grouting can address issues without large-scale demolition .
- Long-Term Value: A single installation provides over 35 years of waterproof protection, with total cost 45% lower than frequent replacement of ordinary sealants .
(3) Reliable Supply & After-Sales
- Packaging & Delivery: Supplied in 20-25m rolls, packaged in moisture-proof polyethylene film to avoid sun exposure and rain damage. Monthly supply capacity reaches 120,000 meters with a 7-25 day lead time .
- Technical Support: Free provision of installation guides, welding operation videos, and cross-section drawings. On-site technical consultation is available for large projects .
- Quality Guarantee: 5-year warranty against material defects (e.g., uneven thickness, reduced elasticity). Non-human-caused quality issues are eligible for free replacement .
Note: For detailed test reports, custom thickness (6-10mm optional), or color customization (standard black/blue/yellow/grey), contact customer service for one-on-one solutions !