Waterstops play a critical role in the integrity of concrete structures, providing a fluid-tight diaphragm when embedded in, run through, and installed in and along concrete joints. Waterstops are mandatory components in concrete construction, preventing water or fluid infiltration through control, construction, and expansion joints. At J P Specialties, we manufacture high-performance waterstop systems that deliver long-term durability, chemical resistance, and watertight integrity in demanding environments. Earth Shield® waterstops are used worldwide by major engineering firms and project owners for chemical containment, water and wastewater treatment, fuel resistance, and ozone contactor structures. J P Specialties also manufactures a complete line of high-quality waterstop installation tools and accessories. We invented the tools and technology to thermo-weld plastic (PVC, TPV, HDPE) waterstops (U.S. Patent Number 4,867,835).Since 1954, J P Specialties has been the global leader in manufacturing the Earth Shield® line of PVC and TPV waterstops, renowned for superior quality and performance. We provide a wide array of waterstop systems and related waterstop accessories for concrete joints, all supported by exceptional technical expertise and customer service. Our key markets include water and wastewater treatment plants, containment systems, tunnels, and infrastructure.
Selecting the correct waterstop system is critical to ensuring long-term watertight performance in concrete structures. Different project conditions—including joint type, water exposure, and chemical environment—require specific materials and designs to prevent leakage and structural damage.For standard construction and expansion joints, PVC waterstops provide a reliable and cost-effective solution with excellent flexibility and durability. In environments exposed to aggressive chemicals or hydrocarbons, TPV waterstops offer enhanced resistance and long-term performance. For applications requiring active sealing, such as cold joints, hydrophilic waterstops expand upon contact with water to form a tight, self-sealing barrier.Engineers and contractors must also consider joint movement, hydrostatic pressure, and installation conditions when selecting a waterstop. Proper product selection, combined with correct installation, ensures optimal performance in demanding applications such as wastewater treatment plants, secondary containment systems, tunnels, and below-grade structures.At J P Specialties, we offer a full range of NSF 61-certified waterstop products and expert technical support to help you choose the best solution for your project.
J P Specialties, Inc. is a trusted leader in manufacturing high-quality thermoplastic (PVC, TPV), rubber (MCR), and metallic (stainless steel) waterstops for fluid-proofing concrete joints. With decades of experience, we are committed to innovation, excellence, and strict industry standards. Our dedication to research, quality, and customer-focused service ensures reliable and durable products for critical projects. We are known for integrity and technical expertise. We prioritize transparency, long-term relationships, and environmental compliance. Whether for infrastructure, environmental protection, or commercial or industrial construction, J P Specialties delivers dependable solutions that you can trust.
Earth Shield® Type NB190® is a modern, hydrophilic chloroprene rubber waterstop with unmatched durability and water sealing capabilities. Manufactured NON-BENTONITE, modified chloroprene rubber, Type NB190® more than doubles its original size (400% in 36 days) when exposed to water. Type NB190® can expand and re-expand unlimited times with virtually no loss of physical properties. Additionally, Type NB190® has excellent resistance to many chemicals, is heat-resistant, and is NSF 61-certified safe for drinking water.
Earth Shield® NSF 61-certified waterstops meet strict performance requirements and regulations, helping ensure critical structures remain safe, fluid-tight, and stable throughout their lifespan. By choosing the right waterstop design and installation methods, engineers can effectively address the challenges of concrete joint sealing and support the long-term success of their projects. Contact our technical engineering team for help with specifications and detailing.
Earth Shield® Stainless Steel Waterstop can stop even the most corrosive fluids in their tracks, even at severely elevated temperatures. We offer a variety of metals, grades, and gauges. Earth Shield® uses 20-gauge 316 low-carbon stainless steel as our standard alloy, offering broad-spectrum corrosion resistance to most aggressive media and is virtually unaffected by ozone, making it ideal for ozone contactor structures in modern water treatment plants.
Earth Shield® Polyvinyl Chloride Waterstop (PVC) is the perfect solution for most water and wastewater applications. Earth Shield® PVC Waterstop is manufactured from prime virgin resin and is the trusted choice for environmentally engineered concrete structures. CRD C572-74 compliant and NSF 61 certified waterstop profiles for new construction and retrofit applications.
Earth Shield® Thermoplastic Vulcanizate Waterstop (TPV [aka TPE-R]) dramatically expands the scope of conventional waterstop by offering unmatched chemical resistance to a broad spectrum of aggressive chemicals, solvents, and hot petroleum oils. Manufactured NSF 61-certified, EPA-compliant waterstop profiles are available for new construction and retrofit.
Accredited online and in-office continuing education webinars and seminars for engineers and architects
Waterstop welding certification course for the contractor installing the Earth Shield® waterstop
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资料来源：企业官网公司介绍页面（复核日期：2026-10-29）。