Please be aware that due to high demand our delivery lead times may be slightly extended to those published – but rest assured we are doing all we can to get your order to you on time.

Click here for Covid-19 business updates

Welcome to Howarth Online

Want to see what is available in your local branch?

Please enter your postcode below.

Don’t want to give a postcode? Allow us to auto-detect your location

Have an account already? Login here

? Why do you want to know where I am?

We sell thousands of different products which means our stock levels around the country vary.

If you share your location with us we can ensure that the stock levels you see on the site are accurate.

We will never share your location with anyone.

If you proceed without sharing your location with us, we can’t show you accurate stock levels.

Share your location with us

We can’t show you accurate stock levels because you haven’t shared your delivery location with us. Please share your location with us now.

Don’t want to give a postcode? Allow us to auto-detect your location


  • Price

Category Information

Waterproofing is used on various building materials to ensure that water is not able to penetrate the area and cause damage. This is particularly useful for concretes, stone etc that is being used externally as well as any internal applications that may experience wetting for example kitchens, bathrooms, swimming pools, saunas etc. 

Adding a coat of a waterproofing product also builds up the structural integrity of the materials. 

At Howarth Timber & Building Supplies, we offer a wide range of waterproofing products that can be used on a variety of materials including: 

  • Block Paving 
  • Patios 
  • Stone 
  • Mortars 
  • Render Finishes 

Purchase your waterproofing products online today or contact your local branch for advice and guidance.