Rubber Waterstop Hydrophilic Waterstop for Reservoir Joints Expanded Bentonite Strip

Product Description

Product Description

Hydrophilic Waterstop is a water-swelling rubber strip that seals concrete construction joints. Sodium bentonite and hydrophilic polymer in the compound take in water and expand to fill the joint gap. The swollen rubber presses against the concrete faces and closes the water path. The strip re-expands on every wetting cycle and seals small cracks over the service life. Used in tunnels, basements, subways, retaining walls, and water treatment structures.

Unlike traditional steel or rubber waterstops, 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.

Product Functions

 * Joint Sealing — The swollen strip closes the concrete joint gap.
 * Water Path Cut — The expanded rubber blocks water from passing the joint.
 * Crack Re-Sealing — The strip re-expands and seals small cracks over time.
 * Pressure Take — The swollen body takes water head pressure at the joint.
 * Backup Sealing — The strip works as a second seal behind other waterstops.
 * Concrete Bonding — The strip sticks to the concrete face at the joint.

Product Features
 * Dual Swelling Agent — Sodium bentonite and hydrophilic polymer work together in the compound.
 * Graded Swell Range — The strip expands across a graded range as water enters.
 * Shape Memory — The swollen body returns to shape after the joint dries.
 * Non-Toxic Compound — The rubber compound carries no harmful additives for potable water work.
 * Profile Range — Bar, rope, and coil profiles cover straight and curved joints.
 * Cut and Fit — The strip cuts on site with a knife to the joint length.

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.What is the expansion rate of the water stop?
The expansion rate ranges from 150% to 600% depending on the specific model selected.

2.Can the product be customized?
Yes, we offer full customization including size, color, shape (P-type, round), and expansion ratio.

3.What are the available sizes?
Standard sizes include 10x20mm, 15x20mm, 20x25mm, 20x30mm, and 30x40mm.

4.How does the water stop work?
It remains dry and stable until water contact, then rapidly expands 2-3 times to fill gaps and form a waterproof barrier.

5.How fast does it swell?
Initial swelling begins within minutes, full expansion in 24-48 hours.

6.What are the lead times for delivery?
Both peak season and off-season lead times are within 7 workdays.

7.What certifications does the product have?
The product is CE certified and authenticated by the Ministry of Communications.

8.What payment methods are accepted?
We accept T/T, L/C, Credit Card, PayPal, Western Union, Cash, and Escrow.