Waterstops act as water-resistant barriers to protect concrete from moisture exposure and damage. Common applications include water towers, sewage tanks, bunded areas protecting tanks containing hazardous liquids and underground passageways.

Advantages of PVC Waterstops

Outstanding physical properties have made PVC the most widely specified waterstop material. Owing to their versatility, elasticity and high resistance to weather conditions and chemicals, PVC waterstops are unsurpassed with a variety of features and benefits.

PVC waterstops are ideal as they present high tensile strength and superior elongation capabilities. PVC can be moulded and welded with the appropriate amount of heat, while presenting strength in the expansion and contraction of concrete joints.

As a protection barrier, their chemical-resistant properties guard concrete from discolouration or damage caused by moisture, metal electrolysis and corrosive substances like acids and alkalis. This makes PVC waterstops ideal for water-retaining structures like pools, dams, tanks and reservoirs.

Swelling and Non-Swelling Waterstops

Apart from PVC waterstops, there are hydrophilic waterstops or swelling waterstops that can be used for a variety of applications. They present unmatched durability and water sealing abilities. Swelling waterstops expand upon contact with water and create an effective compression seal for concrete joints with zero or minimal movement.

Designed as an alternative to conventional waterstops, non-swelling watersops do not rely on moisture to be activated. Instead, they seal on their own and create a long-lasting, watertight bond that prevents moisture from penetrating non-moving concrete joints such as storage tanks, culverts, and pipes of various arch types, retaining walls and foundations.

PVC Waterstops vs Rubber Waterstops

Rubber waterstops are often made with natural rubber, styrene butadiene rubber, or neoprene rubber. Any of these materials are effective at preventing liquid from leaking in or out of the structure. Rubber waterstops are designed to be moulded into concrete, particularly for structures that require the specific physical properties of rubber.

The elasticity and movement accommodation that rubber waterstops offer is ideal for civil engineering structures. From tunnels to irrigation canals, reservoirs to sea walls, rubber waterstops are able to adjust to subsidence and seismic activity. Its versatility and flexibility make it a popular and safe choice for most concrete constructions.

PVC waterstops, on the other hand, are preferred for its corrosion and weather resistant capabilities. Additionally, its ability to withstand shocks and most corrosive materials, such as acids and alkali, have made it the ideal choice for treatment facilities and containment structures.

Although both rubber and PVC waterstops are designed for concrete construction, their physical properties determine their areas of use. Understanding the difference between the two will allow you to choose one that meets your structure’s specific demands.    

How to Install a PVC Waterstop

The areas that are the most susceptible to liquid leakage are concrete joints. In order to protect these areas from damage and deterioration, waterstops need to be installed. To do so successfully, follow these simple steps:

  1. Prior to site preparation, you will have to choose the right type of waterstops for your structure. This will determine the waterstops’ effectiveness.
  2. After you choose your waterstops, uncoil it and check it for cracks or any defects. Once you have determined the condition and quality of the waterstops, you can then start your installation.
  3. Place the waterstops at the appropriate positions with half of its width embedded in the concrete. Make sure there are no rocks or air pockets that can undermine its structural integrity.
  4. Bind the waterstops to the surrounding steel reinforcement with steel wire.
  5. Pour the concrete over the waterstops. Once dry, clear the surface of any debris.
  6. Repeat the aforementioned process for the second layer of concrete.

Trusted Supplier of Concrete Repair Products

Form Direct is a trusted supplier of high-quality waterstops and other concrete repair products sourced from only the trusted brands in the concrete and construction industry. 

Our range of formwork and concrete reinforcing products provide the durable finish needed for concrete strength and longevity. Each product is designed to meet construction and safety standards for Australian conditions. 

We have dedicated facilities for customising products to fit your specific requirements. Our in-house schedulers have years of experience in working with commercial, residential, civil and industrial projects.

For large-scale construction requirements, we have a team of consultants who can assess each product required for your project. Our professional estimators provide a detailed and precise estimate of all the supplies you need. 

And you do not have to worry about the delivery of your products. To ensure prompt service and the security of your purchase, we have our own delivery team and fleet that delivers exactly when and where you want.

Through the relationships we build with our clients, we are able to offer the best solutions based on our deep understanding of specific client and industry needs. 

Feel free to contact us today and let us know how we can help you with your project. Call us on 1300 659 830 and we will discuss your needs. You may also view our catalogue to explore an extensive range of our products.