Concrete Waterproofing Rubber Waterstop Dumbbell Type Rubber Waterstop for Construction Joints

Product Description

Product Description

The Rubber Waterstop is a crucial waterproofing material used in critical locations such as concrete construction joints and deformation joints (e.g., expansion joints, settlement joints) to effectively prevent water penetration, flow, and diffusion-4. It utilizes the high elasticity of rubber to create elastic deformation under various loads, thereby providing robust sealing and effective water stopping-4. During concrete pouring, the waterstop is partially or fully embedded in the concrete, making it an essential waterproofing component in projects like underground structures, bridges, and tunnels.

    *EPDM (Ethylene Propylene Diene Monomer): Offers superior resistance to oxidation, ozone, heat, and erosion, along with good impact resistance. It is suitable for environments with microbia erosion and can withstand weather conditions from -40℃ to 60℃-5.
    *Neoprene (CR): Suitable for construction environments with weak acid and alkali corrosion, with a service temperature range of approximately -25℃ to 60℃-5.
    *Reinforcement Materials: Some products are combined with galvanized steel strips to create steel-reinforced rubber waterstops, which enhance adhesion to concrete and can withstand greater tensile and torsional forces-8.

Features & benefits

*High elasticity. 

*High elongation.

*Excellent high movement accommodation.

*Capable to withstand high hydrostatic head.

*Adjust for subsidence and seismic movements.

*Hot vulcanized site joints.

Function

• Waterproof Sealing: Forms continuous waterproof barrier at concrete joints
• Deformation Adaptation: Excellent flexibility to accommodate structural expansion and contraction
• Corrosion Resistance: Resists erosion from chemicals including acids, alkalis, and salts
• Durable Protection: Maintains stable performance long-term in humid environments
• Buffering Effect: Absorbs stress from structural deformation

Applications

Product Advantages

*High-rise Buildings: Office towers, residential buildings, and mixed-use developments for wind resistance

*Large-span Structures: Stadiums, convention centers, airport terminals, and railway stations

*Bridge Engineering: Cable-stayed bridges, suspension bridges, and viaducts for vibration control

*Industrial Facilities: Power plants, chemical plants, and important industrial structures

*Stable performance: Uniform quality with 99% first-pass acceptance rate

*Cost effective: 30% cheaper than imported products

*Complete specifications: Full width range 200-600mm

*Fast delivery: Regular specifications in stock, shipment in 3-5 days

*Reliable splicing: Field hot or cold splicing with joint strength ≥90% of original

Function

Core Waterstopping Function: Utilizes the high elasticity and physical properties of rubber to form a tight seal in joints, preventing the penetration of water and other fluids-4.

Deformation Adaptation Capability: Can accommodate movements like expansion, contraction, and settlement in concrete structures, maintaining effective water sealing within the designed deformation range-4-8.

Enhanced Structural Stability (For steel-reinforced types): The excellent adhesion between the galvanized steel strip and concrete allows the waterstop to withstand greater tensile and torsional forces, preventing loosening or displacement within the concrete-8.

Specification

Physical properties	Test methods	SBR	High tensile neoprene rubber	Natural rubber
Water absorption 2 days at 70°C (% change)	ASTM D-471	5% (max)	5% (max)	5% (max)
Hardness shore A	ASTM D-2240	65	65	65
Tensile strength	ASTM D- 412	3000 psi (min)	2500 psi (min)	3500 psi (min)
Tensile strength at 300% Modulus	ASTM D-412	1150 psi (min)	1150 psi (min)	1450 psi (min)
Ultimate elongation	ASTM D-412	450% (min)	450% (min)	500% (min)
Compression set 22 hours at 70°C (% original deflection)	ASTM D-395	30% (max)	40% (max)	30% (max)
Accelerated aging 96 hours at 70°C (% of tensile strength before aging)	ASTM D-573	80% (min)	80% (min)	80% (min)
Accelerated aging 96 hours at 70°C (% of elongation before aging)	ASTM D-573	80% (min)	80% (min)	80% (min)
Ozone resistance 7 days at 50 PPHM at 70°C, 20% elongation	ASTM D-1149	No crack	No crack	No crack

Installation

Product Details

Packaging & Shipping

Company Profile

Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.

We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to esta  blishing long-term cooperative relationships with customers from both domestic and international markets.