Description of center bulb rubber water stop:
center bulb rubber water stop, made of quality SBR (styrene butadiene rubber), neoprene rubber or natural rubber, is one of the widest types for concrete structure to prevent liquid leaking in or out. Generally, designed to be cast in the concrete, rubber waterstops are ideal for applications where high physical properties of rubber are required. For example, reservoirs, dams andother water retaining or excluding applications with high movements or water pressure.
Materials properties of center bulb rubber water stop:
SBR and neoprene rubber, as the most common materials for rubber waterstop manufacturing, are used extensively in United States and the worlds. The SBR water stop is preferred for water containment, while neoprene rubber waterstops are recommend for applications of sewage disposal or chemical industries. As your request, natural rubber, EPDM, Nitrile and Silicone waterstops are also available.
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 |
1.Dumbbell type water stops, with flat web section, are ideal for construction and partial contraction joints with little or no movements
2.Center bulb type water stop, as its name implies, features its center bulb which makes it ideal for contraction and expansion joints including high lateral, transverse and shear movements. Meanwhile, it is perfect for withstanding the subsidence of the joints.
Installation of center bulb rubber water stop :
All the rubber water stops are designed to cast in the concrete as an integral joint sealing system. Pre-fabricated waterstops are also supplied to reduce site jointing.
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 establishing long-term cooperative relationships with customers from both domestic and international markets.
Q1. What is your terms of packing?
A: Generally, we pack our goods in Blank Cartons. We privode carton LOGO print service after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before after receive the copy of B/L. We'll show you the photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: We accept FOB,CIF,CNF,DDP,DDU,LC.etc
Q4. How about your delivery time?
A: Generally, it will take 7 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings.
Q6. What is your sample policy?
A: We can supply the sample for free, client only need to pay the delivery cost.