High quality waterproofing products. Seal roofs, tanks, box gutters, retaining walls and more with Liquid Rubber.

100% Australian-made. Successfully applied and tested since 2008. Stop leaks and save money!

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Choose your project:

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Our featured DIY Products

  • RTT - Waterproof Sealant

    RTT - Waterproof Sealant is the ultimate water-based, non-toxic, highly flexible and durable waterproofing solution. It works by creating a watertight seal to keep moisture away from cracks, holes and joints.

    Learn more 

  • RTT - Protective Top Coat

    The RTT - Protective Top Coat is the ultimate UV protective, heat reflective and power-saving waterproof membrane. It is a water-based and 100% acrylic protective coating.

    Learn more 
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See what our customers say about us:

  • Russell McKee | Retail First

    RTT Sealant has completed numerous waterproofing projects for Australia Fair Shopping Centre in Southport
    on the Gold Coast QLD, including sealing concrete cracks and expansion joints in the car parks as well as box
    gutters and ridge capping on the roof. I found the application team to be very accommodating and
    professional and their products have proved to be very effective and reliable.

  • Aaron Butteriss | Queensland Government

    Hi RTT Sealant, please pass on to your team that we are very pleased with the product. As you may
    remember the roof at Coorparoo Education Precinct was in need of replacement but due to the cost of
    removing and replacing the aged roof mounted air conditioning units it was not possible with the limited
    budget available. Your roof coating solution eliminated the need for removal. All roof leaks were fixed after the product was installed. The team that attended to carry out the work was a pleasure to deal with, always acting in a professional and safe manner.

  • Simon Gadd | Ozcare

    RTT Sealant completed major roof waterproofing and restoration projects at our facilities in Brisbane and Townsville. The projects were a complete success and not only does the roof look brand new with its bright white solar reflective finish, there are no more leaks into the buildings. Given the size and difficulty of the applications, the hard working RTT Sealant team was up to the task and did a great job. We look forward to working with them on future projects.

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Frequently Asked Questions

What is Liquid Rubber?

Our Liquid Rubber DIY – Waterproof Sealant is a Potable Water Certified (AS/NZS 4020:2018) elastomeric coating. Engineered to provide exceptional adhesion, elasticity and protective properties. It sticks to almost every surface, withstands even harsh Australian temperatures and is UV stable. 

It can be sprayed onto the surface with a spray machine, brushed on with a brush or rolled with a roller. No heat source or flame is required!

Our Liquid Rubber is ideal for a large variety of waterproofing jobs as it stretches over 1000% with a 95% recovery rate. 

Is Liquid Rubber safe?

Yes. Our Liquid Rubber is Water-Based, Eco-friendly, Non-Toxic, Non-flammable and has no solvents or VOC (volatile organic compounds)

It is Safe for you, your family, pets and plants

What can Liquid Rubber be applied to?

Liquid Rubber can be applied to virtually anything that is not oil based including concrete, wood, brick, masonary, most metals (iron, steel, galvanised steel, aluminium), butynol, shingles, tiles, difficult roof materials including EPDM, TPO, most PVC, SBS, APP, BURs, propylene, polystyrene, fiberglass and OSB. If you are unsure, please contact us to discuss your requirments.

Can you guarantee that Liquid Rubber works?

Liquid Rubber products have been around for over 100 years. We only provide the highest quality Australian Made products and have tested and successfully proven these products on our own projects since 2008.

Where are you products made?

We produce our own products. All our products are 100% Australian-made and owned.

How long does the product last?

When properly applied, the products will last for a minimum of 10 - 15 Years. We give a 10 Year warranty when we apply the products for our customers.

How much product do I need?

Our Waterproof Sealant is applied at 1.5L/m². So our 15L pail will cover 10m² and the 4L pail will cover just over 2.5m²


Our Thermal Coat is applied at 0.6/m² The 15L pail will cover 25m² and the 4L covers 6.5m².

We suggest you buy extra as it’s always best to have a bit more.

How long does the product cure?

It does depend on the thickness it is applied and the weather conditions. But generally the Waterproof Sealant needs 24 – 48hrs per 1mm of coating. Tanks should be left empty for at least 7 days before refilling.

The Protective Top Coat again needs half the time to cure. (Do not use it in tanks as it’s not designed to be underwater).

The Protective Top Coat is fully cured after 2-3 days.

What color is your Liquid Rubber and can it be tinted?

Our Waterproof Sealant (Liquid Rubber) is chocolate brown when wet but cures black. It cannot be tinted.

The Protective Top Coat is white but can be tinted to any colour. So you can apply the Top Coat ontop of the Waterproof Sealant if you want a different color. 

You have a large commercial project on your mind?

If DIY is not an option for you or if you have a large commercial or industrial project, then contact us for a free quote.

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