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RTT - Waterproof Sealant

RTT - Waterproof Sealant

Regular price $279.95 AUD
Regular price Sale price $279.95 AUD
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Tax included. Shipping calculated at checkout.

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


Our Waterproof Sealant is easy to apply by Brush, Roller or Paint Sprayer. 

It is basically like painting with the difference that you are building up a thick waterproof membrane. Open the bucket and you are ready to go. Close the lid and you can use the product for future projects. 

Save money on contractors and Do it Yourself!

Stretches 1000% with 95% recovery!

Popular Uses

- Metal roofs

- Concrete roofs,

- Box gutters

- Tanks and Throughs

- Planter boxes

- Retaining Walls

- Sheds

- Wooden or Metal decks

- Ponds

- and more....


Clean all surfaces free of dirt, oil, impurities and allow to dry. Water blast or wire brush any stubborn debris or rust. Prime all concrete surfaces with a quality 2 part epoxy.


Please refer to the Specific Project for Step-By-Step instructions.

Always apply RTT Waterproof Sealant to the water contacting side of the project. Apply by brush or roller up to 2mm thick per coat. Use ample product and work it into the surface and around protrusions so complete contact is achieved. RTT Geo Textile embedded into the product to repair areas with holes, cracks or joint movement. Apply a minimum of 2 coats to ensure a complete seal. After the final coat, RTT Quick Dry can be sprayed over the area to set the product (optional).


General Instruction

1. Best applied early morning or mid-afternoon in summer (avoid the intense sun when applying).

2. Because our products are water-based, you must avoid solvents like Petrols, thinners, diesel etc.

3. To avoid bubbling and non-curing, DO NOT apply products when there’s dew, cold wind or rain forecasted within 24 hours.

4. Allow 24h curing time before applying the next coat.

5. Curing time depends on temperature, humidity and airflow. Best 20°C or more. The typical curing time is 3-7 days.


At a recomended usage of 1.5L/sqm the products will cover:

- 15L Bucket -> 10sqm,

- 4L Bucket -> 2.5sqm.


Apply a minimum final membrane thickness of 1,5-2,0mm. It should require 2-3 heavy coats.


Apply a minimum final membrane thickness of 1.0-1,5mm. It should require 2 heavy coats.

Safety Features

- Water-Based

- UV-stable

- Eco-friendly

- Safe for you, your family, pets and plants

-No solvents or VOC (volatile organic compounds)

- Non-flammable

- Usable indoors and outdoors


The Top Coat and the Primer are cleaned with water and soap. 

Use our “RTT Sealant Cleaner” to remove any spillage, drips or splashes of the RTTSealant - Ultimate Seamless Waterproof Membrane”.

Remove any masking tape while the products are still slightly wet.


Store in a cool dry place. Keep out of reach of children. This product is a Non-flammable-liquid and does not present any storage or transportation hazards.

Shipping & Returns

We ship our Products throughout Australia and New Zealand. 

Free Shipping applied to orders above $149.00 AUD.


Shipping cost:

15L Bucket: $30 AUD

4L Bucket: $20 AUD


If you have larger orders please contact to obtain a quote.

Expected delivery time:  3-5 Business days.

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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!

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