Bentonite Rubber Water Stop Hydrophilic Swelling Putty Waterstop Rubber Seal for Building Joint Waterproofing Swelling Rubber Water Stop

• Customization: Available
• After-sales Service: Installation Guide
• Application: Outdoor
• Model NO.: JT-BW06
• Certification: CE, ISO
• Shape: Strip
• Size: 10X20mm, 15X20mm, 20X25mm, 20X30mm, 30X40mm
• Type: Roofing and Waterproofing
• Colour: Black/Red/Blue/Customized
• Expansion Rate: 150%-600%
• Surface Treatment: Film Coated
• Tensile Strength(MPa): ≥22
• Density(Mg/M3): 1.1-1.3
• Elongation at Break(%): 400
• Working Temperature: -40-120 Celsius
• Hardness: 30-90 Shore
• Transport Package: Carton Packaging
• Specification: Customized
• Trademark: HengJingGong
• Origin: China
• Package Size: 30.00cm * 30.00cm * 3.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

Product introduction

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.

Properties:

Physical properties	Test method	Result
Color	-	Black
Specific gravity	ASTM D-71	1.35 ± 5%
Hydrocarbon content	ASTM D-4	47% (min)
Volatile matter	ASTM D-6	1% (max)
Penetration, cone at 77°F, 150 gm, 5 sec.	ASTM D-217	40 mm ± 5%
Application temperature	-	-10°F to 125°F
Service temperature	-	-30°F to 180°F

Specification

NO.	ITEM	Result
		PN-150	PN-220	PN-300
1	Expansion rate/%≥	150	220	300
2	Flow at High Temperatur(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	1.2MPa

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

Product Details

Installation

Packing & Delivery

Company Profile

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 establishing long-term cooperative relationships with customers from both domestic and international markets.

FAQ

1. who are we?
We are based in Hebei, China, start from 2013,sell to Domestic Market(80.00%),South America(4.00%),Africa(4.00%),Southeast Asia(4.00%),Mid East(4.00%),Oceania(2.00%),Western Europe(1.00%),Eastern Europe(1.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Bridge Bearing Pad,Expansion Joint,Rubber Inflatable Airbag,Waterstop Belt/Strip,Steel Expansion Joint

4. why should you buy from us not from other suppliers?
1.More than 20 professional senior technical personnel. 2.There are 10 series,over 200 species and more than 2,000 specifications. 3.All products have been authenticated by the Ministry of Communications. 4.Self-research and development,professional.

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese