Collection: Retaining Wall Seal

Waterproof Your Retaining Wall

Find all products needed to waterproof your Retaining Wall below ↓

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  • Step 1:

    Make sure the surface is clean and dry. Use a pressure washer/water blaster to clean the surface.

    Allow the surface to dry before proceeding to the next step. You can use a leaf blower to remove excess water.

  • Step 2:

    Cover and sandwich Geo Textile with the RTT - Waterproof Sealant over cracks, holes, gaps, corners and wall floor joints. Use RTT - Seam Tape to cover bigger holes. Make sure there are no crinkles or air underneath the GEO Textile / Seam Tape. 

    Apply RTT - Quick Dry to the Waterproof Sealant for faster curing and in case of approaching rain.

    Allow to cure for 24h.

  • Step 3:

    Apply 2 - 3 Coats of RTT - Waterproof Sealant on the entire wall by brush, roller or spray machine. 

    Allow 4 - 6h curing time between each coat.

  • Step 4:

    Let it cure for 2-3 days before backfilling.


How much Product do I need?

You will need a minimum of 2L/m2 of RTT - Waterproof Sealant for concrete surfaces.

You will need a minimum of minumum of 1.5L/m2 RTT - Waterproof Sealant for metal surfaces.

How long does it last?

We've been testing and improving our products since 2008. When properly applied the Waterproof Membrane will extend the life of your Watertank by 10+ year.

Why do i need the GEO Textile?

The GEO Textile is sandwiched with the Waterproof Sealant over cracks, holes, seams, vents etc. It is used for reinforcement and stabilisation purposes.

What is the Seam Tape for?

The Seam Tape is used to cover bigger holes and cracks as it is firmer than the GEO Textile. Like the GEO Textile, it is used for reinforcement and stabilisation purposes.

Why do I need the Quick Dry Spray?

The Quick Dry Spray is optional. However, we recommend spraying it on top of a wet Waterproof Sealant layer for a quicker cure and to protect it from moisture.

DIY is not an option for you?

We work with accredited contractors and take on large commercial projects.

Contact us on or use the Contact form and let's discuss your project!