Hydrophilic Bentonite Swelling Strip Waterstop Swelling Bar for Constructional Tunneling Engineering

Product Description:

Bentonite is a swellable clay waterproofing compound that is glued or nailed in strips into construction joints. Known as a hydrophilic waterstop system, bentonite expands up to sixteen times its dry volume when it comes into contact with water, forming a compression seal in concrete joints. Bentonite's ability to swell enables it to fill small cracks and voids in concrete, preventing the ingress of water around joints. And since clay is a natural material, bentonite is a popular waterstop choice for potable water applications

PN Type Technical parameters

PN Type Bentonite Waterstop Strip

PN type is one type hydrophilic watertight product made of rubber and other additives,
which make it expansible with physical properties without vulcanization molding process, which is the only process different from PZ type,
normally choose this type at <350% expansion rate that reducing production cost on base of quality.

PZ Type Technical parameters

PZ Type Waterstop Strip

PZ type is one type hydrophilic watertight product made of rubber and other additives,
which make it expansible with physical properties by through vulcanization molding, but different from general extensibility characteristics and elastic seal water function.
It can be water swelling with water with affection of it to make it more reliable than ordinary waterproof materials, normally choose this at >330% expansion rate.

Bentonite Waterbar is a swellable hydrophilic Bentonite waterstop, made from a combination of synthetic rubber and sodium Bentonite clay. When it is installed in a confined joint it will swell upon contact with water to ensure a waterproof joint is created. Expansion of the waterbar creates a positive pressure against the faces of the concrete creating a joint that is resistant to hydraulic pressure.

Bentonite Waterbar has a swelling capacity of up to 400% of its original volume. The expansive clay mass will seal any hairline shrinkage cracks that appear in the concrete. 

Bentonite is used for the integral sealing of horizontal and vertical construction joints in fresh concrete, pipe penetrations and sealing concrete to steel joints. It may be used in the place of conventional PVC waterbars as an effective method of preventing passage of water at construction joints. 


Features & benefits:

• High watertight properties - once exposed to water, PZ waterstop will expand one to five times to fill all irregular surfaces, holes and spacing of surrounding concrete. Meanwhile, if the construction joints are displaced which will result in oversized gaps beyond elastic range of waterstops, traditional waterstop will lose its effect of water-proofing, but our PZ waterstop still performs great by continual swelling.
• Much stronger advantages of cross-linked chemical structure at the atomic level.
• Smaller size but uncompromising water swelling property.
• Eliminate elastic fatigue caused by excessive compression.
• Excellent water resistance, chemical resistance and anti-aging property.
• Easy and quick to install.

Shenzhou City Sanshi Rubber Company is a professional manufacturer of rubber oil seal, customized rubber parts, customized PU products, rubber O ring, rubber damper and so on. The material canbe NBR, EPDM, FKM, MVQ, NR, PU, BAKELITE, plastic.

We support OEM manufacture. And we have more than 30,000 sets molds which can make more customer make more orders without making molds.

Our Service:
Quality first, efficient service. We provide a complete set of sealing solutions, the best quality, price, service.

Product Application: Engineering machinery, hydraulic pneumatic, petroleum , automobile, valve pipeline, electronic appliances, food industry, electric power, chemical industry, coal mine industry, metallurgy, engineering shield machine and other industries

We also sell to: More than 40 countries including the United States, Germany, Japan, the United Kingdom, Italy, Spain, Russia, Canada, Australia, Malaysia, Philippines, Indonesia, Mexico, Brazil, Peru, Chile, Argentina, Israel, Saudi Arabia, Lebanon, Ukraine, Pakistan, Thailand, Vietnam, etc.

Packing & delivery :
Our Service
1. Your inquiry about our products can be replied within 12 hours.
2. Professional & experienced staff help you solve problems of rubber products. 3. Customized rubber products are highly welcomed.
4. Mode of production: Compression or injection or extrusion.
5. Small order is available.
6. Good after-sales service provided, contact us if you have any question.