If you’re not familiar with Hydrotite water stops, then you might not know exactly what they’re used for and how to install them.

A Hydrotite water stop is basically a hydrophilic device used as a sealant against water. It is designed to swell up when exposed to liquids and is capable of filling the gaps in concrete and creating an extremely tight seal. Hydrotite water stops are excellent as they can conform to just about any shape. Their purpose is to prevent leaks and absorb water, they have a range of uses and are popular in a number of industries. There are many different applications such as in pools, reservoirs and in water treatment plants.

Are they easy to install?

Home construction and Hydrotite installation

Hydrotite water stops are popular because they are extremely easy to install. They are self-adhesive and can be installed in a way that allows them to expand over building joints, this means that the seal is extremely strong. It is also possible to install Hydrotite water stops with a coating that can help to delay the expansion so that it does not seal prematurely.

These clever sealing products are designed for regular use and can handle numerous switches between wet and dry. They are also great because they can be used on uneven surfaces and work well with traditional sealants.

How to install

If you’re planning to install a Hydrotite water stop then the first thing you’ll want to do is make sure you prepare the surface by getting it clean and smooth. You’ll want to remove any excess dust or debris as this could impact the sealing properties of the product. If there are any air holes on the surface then you should fill them in. You’ll need to take into account that a minimum cover of 50mm of concrete will be needed if it is reinforced, if it’s not you’ll need around 100mm.

To make a join you’ll need to press butt joints together quite firmly. You don’t need to do much more than snip the ends of the product. If you’re worried about leaking then a product like Leakmaster can help to ensure that everything is completely watertight.

It’s a good idea to steer clear of using nails as this can cause issues and might lead to the concrete settling under the seal.

When cutting your product, you should leave a bit of tail on it (around 100mm) to allow for butt joins. If you have a sharp right angle then it’s a good idea to use a butt-join – avoid pulling the corners as this can cause a void around the edges of your seal. If you want to avoid running into problems with early expansion then make sure you keep the product in a dry location before installation. If you think it might have been exposed to liquid then examine it for pre-expansion. If your Hydrotite water stop has absorbed liquid it will be visible by a change in colour to a light blue. If your seal has already come into contact with liquid then you shouldn’t go ahead with install. It can be installed once it has dried and returned to its normal colour.

You can choose to install with or without the sticky backing. Whether you use an adhesive or not depends on your needs. If you don’t use an adhesive it’s a good idea to use some extra product around the edges to keep it water-tight.

This clever, hydrophilic product is super quick and easy to install, but you should take the time to ensure you do it correctly to prevent leaks.