20*25mm Rubber Expansion Hydrophilic Waterstop Strip Bentonite Swellable Water Stop

• Customization: Available
• After-sales Service: Quality
• Application: Indoor, Outdoor, Concrete Joint
• Model NO.: JTZST-001
• Certification: CE, ISO
• Shape: Round, Strip
• Product Name: Bentonite Rubber Water Stop
• Size: 10X20mm, 15X20mm, 20X25mm,20X30mm,30X40mm
• MOQ: 100m
• Expansion Rate: 150%-600%
• Transport Package: in Roll on Pallet
• Specification: 10x20mm, 15x20mm, 20x25mm, 20x30mm, 30x40mm
• Trademark: HengJingGong
• Origin: Hebei
• HS Code: 4008290000
• Production Capacity: 100000m/30days
• Package Size: 35.00cm * 36.00cm * 2.00cm
• Package Gross Weight: 1.500kg

Product Description

Product Description

Product Introduction
The rubber waterstop strip is a high-performance waterproof sealing material manufactured using special rubber formulations. The product features excellent elasticity and durability, capable of forming reliable waterproof barriers in concrete joints. When exposed to moisture, its unique expansion characteristics automatically fill gaps, achieving active sealing effects. Widely used for permanent waterproofing in various construction projects.

Material

• Base Material: Premium natural rubber or synthetic rubber (neoprene, EPDM)

• Expansion Components: Contains special hydrophilic polymers

• Reinforcement Materials: Added reinforcing carbon black and mineral fillers

• Protection System: Includes anti-aging agents, UV absorbers

• Adhesive Layer: Some models feature self-adhesive coating

Manufacturing Process

Key manufacturing processes include:

    *Internal Mixing: Precise internal mixing of rubber, hydrophilic components, and various additives according to formulations.
    *Compounding: Uniform mixing of all components through compounding processes.
    *Extrusion: Formation of strips with square or other specified cross-sections from compounded rubber material.
Vulcanization (for product type): Product-type waterstop strips undergo vulcanization to impart better elasticity and physical strength.

Function

Product Features

*Active Sealing: Expands in volume upon water contact, actively filling and blocking all irregular surfaces, cavities, and gaps.
*Continuous Impermeability: Generates substantial contact pressure after expansion, resisting certain water pressure to achieve reliable water blockage.
*Self-healing Capability: Continues to absorb water and expand to seal new micro-cracks caused by foundation deformation or settlement, enhancing waterproofing effectiveness.
*Displacement Adaptation: Maintains water-stopping functionality through its expansion characteristics even when joint displacement exceeds the recovery range of ordinary elastic materials.

*High-Efficiency Waterproofing: Implements "water-stopping" mechanism with reliable leakage prevention.
*Durability and Stability: Primarily composed of inorganic materials with excellent aging resistance and corrosion resistance, ensuring long service life.
*Environmental Safety: Free from harmful substances, classified as an environmentally friendly product.
*Easy Installation: Features self-adhesive properties for direct application to concrete surfaces, or can be fixed with high-strength steel nails for simple installation.

Sizes:

*Width: 10 mm, 15 mm, 20 mm, 30 mm, 40 mm, 50 mm.
*Height: 10 mm, 20 mm, 30 mm, 25 mm, 40 mm, 50 mm, 60 mm.
*Color: black, red and other colors also can be customized.
*Note: Other specifications also can be customized.

Working principle of hydrophilic water stop strip

Hydrophilic waterstop strips maintain a flexible, strip-like form when dry. Upon contact with water, they rapidly expand in volume (typically by 150% to 600%, with some products reaching up to 1000%). They compress to fill voids within concrete joints, forming a dense waterproof barrier that prevents water penetration.

Specification

Physical properties		PZ-150	PZ-250	PZ-400	PZ-600
Hardness (shore A)		42±7	42±7	45±7	48±7
Tensile strength		3.5 Mpa (min)	3.5 Mpa (min)	3 Mpa (min)	3 Mpa (min)
Elongation		450% (min)	450% (min)	350% (min)	350% (min)
Expansion rate		150%	250%	400%	600%
Repeated water immersion test	Tensile strength	3 Mpa (min)	3 Mpa (min)	2 Mpa (min)	2 Mpa (min)
	Elongation	350% (min)	350% (min)	250% (min)	250% (min)
	Expansion rate	150%	250%	300%	500%
Low temperature bending (-20°C*2h)		No crack	No crack	No crack	No crack

Installation

Product Details

Hydrophilic water stop strips are mainly used for waterproofing the joints of underground concrete structures, and are commonly used in the following scenarios:

 *Subway tunnels: block pipe joints and construction joints to prevent groundwater infiltration
 *Underground pipe corridor: used for expansion joints and the periphery of wall-through pipes to ensure overall sealing
 *Sink/sewage treatment plant: "Stop water with water" at construction joints and settlement joints, resistant to acid and alkali corrosion
 *Civil defense engineering: The underground space is moisture-proof and impermeable to improve the durability of the structure
 *Building basement: The horizontal/vertical construction joints of the exterior walls are easily pasted to prevent groundwater penetration

    In a nutshell: Wherever underground concrete leaks, hydrophilic waterstop strips can be used to "expand upon contact with water and automatically seal leaks."

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.

FAQ

1.When can I get the quotation?
A:We usually quote within 24 hours after we get your inquiry.

2.How long can I expect to get the sample?
A:The samples will be ready for delivery in 5-10days. The samples will be sent to you via express and arrive in 5-7days.

3.How long is the delivery time
A:Usually 10-15 days, depending on the quantity purchased.

4.How can I get a sample to check your quality?
A:After negotiating the price, we will provide you with samples for testing.

5.what can you buy from us?
Bridge Bearing Pad,Seismic isolation bearing,Expansion Joint,Rubber Inflatable Airbag,Waterstop Belt/Strip,Steel Expansion Joint,Butyl Tape

6.What's payment term?
A:T/T, L/C at sight, Western Union

7. Do we have quality guarantee?
Of Course!
--from raw material to manufacturing, we have rigid quality control.
--before delivery, we have strict quality inspection.
--Third party inspection is also available at your request.
--We also have ISO, CE certificates.