Self-Expanding Bentonite Water Stop Hydrophilic Swelling Waterstop Bar

• Customization: Available
• After-sales Service: Installation Guide
• Application: Outdoor, Concrete Joints
• Model NO.: JT-BW50
• Certification: CE, ISO
• Shape: Strip
• Product Name: Hydrophilic Water Stop Strip
• Type: Roofing and Waterproofing
• Colour: Black/Red/Blue/Customized
• Function: Waterproof, Anti-Aging, Corrosion Resistance
• Bentonite Expansion Rate: ≥300%
• Polymer Expansion Rate: >400%
• Tensile Strength(MPa): ≥22
• Elongation at Break(%): 400
• Transport Package: According to Customer Needs
• Specification: 10X20mm, 15X20mm, 20X25mm, 20X30mm, 30X40mm
• Trademark: HengJingGong
• Origin: China
• HS Code: 4008290000
• Production Capacity: 50000 Meters Per Week
• Package Size: 36.00cm * 36.00cm * 2.00cm
• Package Gross Weight: 1.500kg

Product Description

Product Description

Bentonite waterstop is an active sealing strip made from natural sodium bentonite compounded with polymers and extruded into a flexible cord. Upon contact with water it swells rapidly to form a soft, dense barrier that seals construction joints, post-cast strips and pile heads in concrete, acting like an "intelligent valve" that closes when wet and remains dormant when dry. Its unique self-healing ability allows repeated swelling to refill micro-cracks and capillaries, providing long-term, reliable waterproofing for underground structures and earning the nickname "breathable waterstop".

Unlike traditional steel or rubber waterstops, bentonite waterstop requires no on-site welding or mechanical anchoring; simply press it onto the substrate and it begins to work, greatly simplifying construction. Its eco-friendly, non-toxic formula can be used in potable water structures and maintains high swelling capacity and water retention even in aggressive, saline or alkaline environments, making it the ideal choice for achieving "low-cost, high-efficiency, zero-leakage" sealing in tunnels, subways, utility galleries and water tanks.

Features
    *Active swelling: expands within minutes of water contact to fill joint capillaries
    *Self-healing: re-swells to re-seal if micro-cracks appear
    *Eco-friendly & non-toxic: potable-water approved for reservoirs and water plants
    *Salt & alkali resistant: sodium bentonite maintains swelling in aggressive soils
    *Simple application: no heating or welding required—cut, press and fix

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.

Specification

Bentonite Waterstop Strip Parameters
NO.	ITEM	Result
		PN-150	PN-220	PN-300
1	Expansion rate/%≥	150	220	300
2	Flow at High Temperature (80℃×5h)	No fiow	No fiow	No fiow
3	Low temperature test (-20℃×5h)	No crack	No crack	No crack
4	Peel strength	0.05MPa
5	Shear Strength	1.0MPa
6	Hydrostatic Pressure	>70m

Installation

Detailed picture

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.