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Waterproof Sealant | Original Liquid Rubber DIY - Seal leaks quick & easy for Roofs Tanks Ponds Fencing & Walls

Waterproof Sealant | Original Liquid Rubber DIY - Seal leaks quick & easy for Roofs Tanks Ponds Fencing & Walls

Regular price $32.95 AUD
Regular price $32.95 AUD Sale price $32.95 AUD
Sale Sold out
GST included. FREE SHIPPING 3 - 8 Business Days

No Primer Needed

RTT Waterproof Sealant Is the original Liquid Rubber DIY and is a high-quality, water-based, and non-toxic hybrid liquid rubber that works by creating a watertight seal to keep moisture away from cracks, vents, holes, and joints. It can be applied with a brush, roller, or paint sprayer and stretches 1000% with 95% recovery.

We will beat any prices by 5%.

Designed for extreme weather, our product is durable and flexible enough to seal almost anything. With our sealant, you'll never have to worry about water damage again!

What makes our sealant the top choice?

  • Highly flexible and durable. This ultra-tough waterproof sealant is highly flexible once cured. The UV-stable formulation will withstand high temps and sun exposure, leaving you with a long-lasting product that’ll still provide years of protection after installation.
  • Easy to apply. Just roll, brush or spray over your concrete, brick, or stone and you will create a waterproof barrier — perfect for DIY's who want to do the job themselves and save money on contractors.
  • Safe to use. This sealant contains no solvents or VOCs, which makes it completely safe for you, your family, pets and plants. It can be used both indoors and outdoors without the toxic effects of traditional solvent-based sealants.

Don't let water damage ruin your property. Trust in the reliability and effectiveness of our liquid rubber waterproof sealant. Order yours today and enjoy the peace of mind that comes with knowing your home or business is protected! 


Metal Roofs:

You only need to cover joints, screws, cracks, skylights, vents etc. Encapsulating them with RTT - GEO Textile.

A good metal roof does not need to be covered with Waterproof Sealant. Only the rusty areas.

If it got surface rust - use RTT Rust inhibitor primer without the Rubber. Apply the primer to the entire surface.

For metal roofs and rendered concrete apply 1.5L/m2.

The products will cover:

- 15L Bucket covers ≈ 10m2

- 10L Bucket covers ≈ 7m2

- 4L Bucket covers ≈ 3m2

- 2L Bucket covers ≈ 1.5m2

- 1L Bucket covers ≈ 1m2

- 0.5L Bucket covers ≈ 0.5m2

Concrete Surface:

For rough or uneven concrete apply a minimum of 2L/m2

Note: Apply a 2 Part Epoxy onto the surface first before applying the rubber to prevent bubbling.

- 15L Bucket covers ≈ 8m2

- 10L Bucket covers ≈ 5m2

- 4L Bucket covers ≈ 2m2

- 2L Bucket covers ≈ 1m2

- 1L Bucket covers ≈ 0.5m2

- 0.5L Bucket covers ≈ 0.25m2

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.

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.  



Expected shipment duration (within AUS):  3-8 Business days (Mon -Fri)

For larger orders, please contact us at or use the Contact form.

At RTT Sealant, we offer FREE SHIPPING on all orders within Australia. We understand that getting your items to you quickly is important, so we make every effort to process and ship your order as soon as possible.

Orders are typically processed within 1-2 business days and shipped via Australian Post / Transdirect / Sendle. Once your order has shipped, you will receive a shipping confirmation email with a tracking number.

Please note that we are not responsible for any delays caused by the shipping carrier. If you have not received your order within the estimated delivery time, please contact us at [email or phone number] and we will do our best to assist you.

Return Policy

We want you to be completely satisfied with your purchase from RTT Sealant. If for any reason you are not satisfied, you may return your items within 30 days of receipt for a full refund or exchange.

To initiate a return, please contact us at or use the Contact form to request a return label. Once we receive your returned items, we will process your refund or exchange as soon as possible.

Please note that all items must be returned in their original condition.

We do not accept returns of final sale items.

We will be responsible for the cost of return shipping.

If you received a damaged or defective item, please contact us immediately at and we will do our best to assist you.

Thank you for choosing RTT Sealant for your shopping needs! If you have any questions about our shipping or return policy, please contact us. We're here to help!


We strive to serve our customers with the best products. Every single product that you choose is thoroughly inspected, checked for defects and packaged with utmost care. We do this to ensure that you fall in love with our products.

Sadly, there are times when we may not have the product(s) that you choose in stock or may face some issues with our inventory and quality check. In such cases, we may have to cancel your order. You will be intimated about it in advance so that you don’t have to worry unnecessarily about your order. If you have purchased via Online payment (not Cash on Delivery), then you will be refunded once our team confirms your request.

We carry out a thorough quality check before processing the ordered item. We take utmost care while packing the product. At the same time, we ensure that the packing is good such that the items won’t get damaged during transit. Please note that RTT Sealant is not liable for damages that are caused to the items during transit or transportation.

We will revise your returned product as soon as we receive it and if it follows the guidelines addressed above, we will proceed to issue a refund of your purchase. Your refund may take a couple of days to process but you will be notified when you receive your money.


Your Consent

By using our website, registering an account, or making a purchase, you hereby consent to our Return & Refund Policy and agree to its terms.


Contact Us

If, for any reason, You are not completely satisfied with any good or service that we provide, don’t hesitate to contact us and we will discuss any of the issues you are going through with our product.


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RTT Sealant has specialist applicators but why not diy

Liquid Rubber DIY

Why Liquid Rubber DIY is an option?

Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber waterproofing sealant since 2008) stands out as a top choice for DIY enthusiasts and professionals alike due to several key factors:

Ease of Application:

Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber waterproofing sealant since 2008) products are designed with the user in mind, offering simple and straightforward application processes. Whether you're a seasoned contractor or a novice homeowner, Liquid Rubber DIY's (by RTT Sealant the Original Liquid Rubber waterproofing sealant since 2008) user-friendly formulas make waterproofing and sealing projects accessible to everyone.


Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber waterproofing sealant since 2008) offers a wide range of products suitable for various applications, including roofing, foundation waterproofing, pond liners, and concrete sealing. This versatility allows users to tackle multiple projects with confidence, knowing they have a reliable solution at hand.


Liquid Rubber DIY's (by RTT Sealant the Original Liquid Rubber waterproofing sealant since 2008) formulations are engineered for long-lasting performance, even in challenging environments. Whether exposed to harsh weather conditions, UV radiation, or fluctuating temperatures, Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber) products maintain their integrity and effectiveness over time.

Environmentally Friendly: 

Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber sealant since 2008) is committed to environmental responsibility, offering water-based, low VOC (volatile organic compound) formulations that minimize harm to the environment and indoor air quality. This eco-conscious approach resonates with environmentally conscious consumers seeking sustainable solutions.


Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber sealant since 2008) provides cost-effective solutions for waterproofing and sealing needs. By offering DIY-friendly products, Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber sealant) helps users save on labor costs associated with hiring professionals while still achieving professional-quality results.

Technical Support: 

Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber sealant since 2008) understands that DIY projects may come with questions and uncertainties. That's why they offer comprehensive technical support to assist users at every step of the process. Whether you need guidance on product selection, application techniques, or troubleshooting, Liquid Rubber DIY's (by RTT Sealant the Original Liquid Rubber sealant) knowledgeable support team is readily available to help.

Proven Track Record: 

Since 2008 with years of experience in the industry, Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber sealant) has earned a reputation for excellence and reliability. Countless satisfied customers have attested to the effectiveness and quality of their products, further cementing Liquid Rubber DIY's (by RTT Sealant the Original Liquid Rubber sealant) position as a trusted leader in the waterproofing and sealing market.

DIY is a great option for your next project!

Liquid Rubber DIY (by RTT Sealant the Original Liquid Rubber since 2008) stands out as the go-to choice for DIY waterproofing and sealing projects thanks to its ease of application, versatility, durability, environmental friendliness, cost-effectiveness, comprehensive technical support, and proven track record of success. Whether you're sealing a roof, waterproofing a foundation, or lining a pond, Liquid Rubber DIY by RTT Sealant offers the solutions you need to get the job done right Call now on 1300 636 272.

Liquid Rubber waterproof sealant Bunnings? No! Buy online with free delivery all over Australia.

RTT Sealant has professional roofers but why not diy

Spray on Waterproofing Rubber Paint

RTT your one stop shop for Spray on Waterproofing Rubber Paint

RTT Sealant's spray on waterproofing rubber paint is a cutting-edge solution designed to protect surfaces from water damage while offering ease of application and long-lasting durability. With its innovative formulation and versatile application methods, RTT Sealant's rubber paint revolutionises waterproofing across a wide range of projects and surfaces.

1. Advanced Formulation:

RTT Sealant's spray on waterproofing rubber paint is formulated with state-of-the-art rubber polymers and additives. This advanced composition creates a seamless, flexible membrane that effectively seals out water and prevents moisture intrusion, even in the most demanding environments.

2. Seamless Application:

One of the key advantages of RTT Sealant's rubber paint is its ease of application. Utilising a spray on method, users can quickly and evenly apply the rubber paint to surfaces of various shapes and sises. This seamless application process ensures thorough coverage and optimal waterproofing performance with minimal effort.

3. Versatility:

RTT Sealant's rubber paint is incredibly versatile and can be used on a wide range of surfaces, including concrete, metal, wood, and more. Whether sealing a roof, waterproofing a basement, or protecting outdoor furniture, this spray on solution provides reliable waterproofing for virtually any application.

4. Flexibility:

Flexibility is a hallmark of RTT Sealant's rubber paint, allowing it to adapt to the natural movements and contours of the surface it's applied to. This flexibility ensures that the waterproofing membrane remains intact and effective, even in environments prone to temperature fluctuations and structural shifting.

5. Durability:

RTT Sealant's rubber paint is engineered for long-lasting durability, providing years of reliable waterproofing protection. Resistant to UV exposure, weathering, and abrasion, this spray on solution maintains its integrity and performance even in harsh outdoor conditions.

6. Seamless Repairs:

In the event of damage or wear, RTT Sealant's rubber paint allows for seamless repairs. Simply reapply the spray on solution to the affected area to restore waterproofing integrity without the need for extensive surface preparation or specialised equipment.

7. Cost-Effective:

RTT Sealant's rubber paint offers a cost-effective waterproofing solution compared to traditional methods such as membrane installation or sheeting. Its ease of application and long-lasting durability help save both time and money, making it an attractive option for DIY enthusiasts and professional contractors alike.

8. Environmentally Friendly:

Committed to sustainability, RTT Sealant's rubber paint is formulated with environmentally friendly materials and low VOC (volatile organic compound) emissions. This eco-conscious approach ensures minimal environmental impact during application and throughout the lifespan of the waterproofing membrane.

Spray or Roll on Waterproofing Paint

RTT Sealant's spray on waterproofing rubber paint redefines waterproofing with its advanced formulation, seamless application, versatility, flexibility, durability, cost-effectiveness, and environmental friendliness. Whether sealing roofs, waterproofing foundations, or protecting outdoor surfaces, this innovative solution spray or roll on, provides unmatched performance and peace of mind for any project.

You will not find our Liquid Rubber waterproof sealant Bunnings. Buy online with free delivery all over Australia.

RTT Sealant quality Water Seal products

Water Seal

Ultimate water seal use RTT Waterproofing Liquid Rubber Sealant

Water sealants are essential products designed to protect various surfaces from water damage by forming a protective barrier that repels water and prevents moisture intrusion. Whether applied to outdoor structures, concrete surfaces, wood decks, or masonry, water sealants play a crucial role in maintaining the integrity and longevity of buildings and infrastructure. Let's delve into the key features and benefits of water sealants:

1. Protection Against Water Damage:

The primary function of water sealants is to provide reliable protection against water damage. By forming a waterproof barrier on surfaces, these sealants prevent water from penetrating and causing deterioration, rot, mold, or other moisture-related issues.

2. Diversity:

Water sealants come in various formulations to suit different surface types and applications. Whether you're sealing a concrete driveway, a wooden deck, a brick wall, or a stone patio, there's a water sealant specifically designed to meet your needs.

3. Ease of Application:

Many water sealants are easy to apply, either through brushing, rolling, spraying, or even dipping. This ease of application makes them accessible to DIY enthusiasts and professional contractors alike, allowing for efficient and hassle-free waterproofing projects.

4. Transparency:

Our water sealant products are 100% waterproof and are manufactured in Australia by an Australian owned business RTT Sealant the original Liquid Rubber waterproofing sealant since 2008. This water sealant is particularly desirable for surfaces like wood decks, metal roofing, concrete roofing or decorative concrete where aesthetics are important as any Colourbond color can be painted over it. Check out our Protective Top Coat.

5. UV Protection:

In addition to repelling water, certain water sealants offer UV protection to shield surfaces from the damaging effects of sunlight. UV-resistant sealants help prevent fading, discoloration, and deterioration caused by prolonged exposure to the sun's rays.

6. Breathability:

While water sealants create a waterproof barrier, it's essential for them to allow trapped moisture to escape to prevent issues like mold or mildew growth. Many modern water sealants are breathable, allowing vapor to pass through while still repelling liquid water.

7. Longevity:

High-quality water sealants offer long-lasting protection, reducing the frequency of reapplication and maintenance. These durable sealants withstand weathering, foot traffic, and other environmental factors, ensuring reliable performance over time.

8. Environmental Considerations:

Environmentally friendly water sealants are formulated with low VOC (volatile organic compound) emissions and biodegradable ingredients, minimizing their impact on the environment and indoor air quality. Choosing eco-conscious sealants helps reduce environmental harm while still providing effective waterproofing.

9. Cost-Effectiveness:

Investing in a quality water sealant is a cost-effective way to protect surfaces from water damage and extend their lifespan. By preventing costly repairs and replacements due to water-related issues, water sealants offer significant savings in the long run.

10. Maintenance:

Water sealants simplify maintenance by reducing the need for frequent cleaning, repairs, and replacements. Surfaces treated with water sealants are easier to clean and maintain, requiring minimal effort to keep them looking their best.

Protect your surface with RTT Waterproofing Liquid Rubber Sealant

Water sealants are indispensable products for protecting surfaces from water damage, offering versatility, ease of application, transparency, UV protection, breathability, longevity, environmental considerations, cost-effectiveness, and simplified maintenance. Whether you're sealing a deck, a driveway, a wall, or a roof, choosing the right water sealant ensures durable and reliable waterproofing for years to come.

RTT Sealant specialists in Roof Leak Repairs

Roof leak? You need Roof Repairs.

Geo textile applied on a metal roof in conjunction with Liquid Rubber Waterproof Sealant

RTT your one stop shop for Spray on Waterproofing Rubber Paint

Experiencing a roof leak can be a homeowner's worst nightmare. Beyond the inconvenience of dealing with water intrusion, roof leaks can lead to costly damage to the structure and interior of your home. Fortunately, RTT Sealant offers comprehensive roof repair solutions to address leaks promptly and effectively, safeguarding your home from further damage. Here's why you need RTT Sealant for roof repairs:

1. Prompt Resolution:

When you discover a roof leak, prompt action is essential to prevent further damage to your home. RTT Sealant understands the urgency of roof repairs and provides prompt solutions to address leaks efficiently, minimizing the risk of additional water intrusion and structural damage.

2. Expertise and Experience:

With years of experience in the roofing industry, RTT Sealant's team of experts possesses the knowledge and expertise to tackle a wide range of roof repair issues. Whether you're dealing with damaged shingles, flashing, or sealant, RTT Sealant has the skills and resources to provide effective repairs that stand the test of time.

3. Comprehensive Solutions:

RTT Sealant offers comprehensive roof repair solutions tailored to your specific needs. From patching leaks and replacing damaged materials to resealing vulnerable areas, RTT Sealant addresses all aspects of roof repair to ensure thorough and lasting results.

4. High-Quality Materials:

RTT Sealant utilizes high-quality materials and products in all roof repair projects. Whether it's sealants, membranes, or adhesives, RTT Sealant's premium materials are engineered for durability, weather resistance, and long-term performance, providing reliable protection against future leaks.

5. Customised Approach:

Every roof repair project is unique, and RTT Sealant understands the importance of a customised approach. Their team works closely with homeowners to assess the extent of the damage, identify the underlying causes of leaks, and develop tailored repair solutions that address the root issues effectively.

6. Weather Resistance:

RTT Sealant's roof repair solutions are designed to withstand the rigors of the elements. Whether you're dealing with heavy rain, strong winds, or extreme temperatures, RTT Sealant's repairs provide durable protection against weather-related damage, keeping your home safe and dry year-round.

7. Cost-Effective:

Ignoring a roof leak can lead to costly repairs down the line, not to mention potential damage to your home's interior and belongings. RTT Sealant's roof repair services offer a cost-effective solution to address leaks promptly, preventing further damage and saving you money in the long run.

8. Peace of Mind:

With RTT Sealant handling your roof repairs, you can enjoy peace of mind knowing that your home is in capable hands. From initial assessment to final inspection, RTT Sealant's professional team takes care of every detail, ensuring that your roof is repaired properly and your home is protected against future leaks.

When faced with a roof leak, you need prompt, reliable roof repair solutions to safeguard your home and belongings. RTT Sealant offers expertise, comprehensive solutions, high-quality materials, a customised approach, weather resistance, cost-effectiveness, and peace of mind, making them the ideal choice for all your roof repair needs. Don't let a leaky roof compromise the integrity of your home—trust RTT Sealant to keep your roof in top condition for years to come.

RTT Sealant your best doctor leak specialist

Dont use Dr Leak when you can use RTT Sealant.

Why use Dr Leak when you can use RTT Sealant.

When it comes to addressing roof leaks and waterproofing challenges, choosing the right product and service provider is crucial to ensure effective and long-lasting results. While options like Dr. Leak may seem appealing, RTT Sealant stands out as the superior choice for several compelling reasons:

1. Specialisation and Expertise:

RTT Sealant specialises in manufacturing waterproofing solutions, Australian made and owned, with a focus on developing innovative products and techniques to address a wide range of roofing issues. Their expertise in the field ensures that you receive professional-grade solutions tailored to your specific needs, backed by years of industry experience and knowledge.

2. Comprehensive Product Line:

RTT Sealant offers a comprehensive range of products designed to tackle various waterproofing challenges, from roof leaks and cracks to foundation waterproofing and concrete sealing. Whether you're dealing with a minor leak or a major waterproofing project, RTT Sealant has the right product to get the job done effectively.

3. High-Quality Materials:

RTT Sealant prides itself on using only the highest quality materials in its products, ensuring durability, reliability, and long-lasting performance. Their advanced formulations and premium ingredients provide superior waterproofing protection, even in the most demanding conditions.

4. Innovative Solutions:

RTT Sealant is committed to innovation and continuous improvement, constantly developing new and improved solutions to meet evolving customer needs. Their research and development efforts result in cutting-edge products and techniques that deliver superior results and set industry standards.

5. Customised Approach:

RTT Sealant understands that every waterproofing project is unique, and they take a customized approach to address each customer's specific requirements. Their team of experts works closely with clients to assess their needs, identify the underlying issues, and recommend tailored solutions that deliver optimal results.

6. Proven Track Record:

With a proven track record of success and countless satisfied customers, RTT Sealant has earned a reputation for excellence and reliability in the industry. Their track record speaks volumes about the quality of their products and services, giving customers confidence and peace of mind.

7. Commitment to Customer Satisfaction:

RTT Sealant is dedicated to ensuring customer satisfaction at every step of the process. From initial consultation to project completion, their team goes above and beyond to exceed expectations and deliver exceptional service, earning the trust and loyalty of clients across the board.

8. Warranty and Support:

RTT Sealant stands behind the quality and performance of its products with comprehensive warranties and ongoing support. Our commitment to customer satisfaction doesn't end with the sale—RTT Sealant provides continued assistance and support to ensure that customers are satisfied with their investment.

When it comes to waterproofing solutions, RTT Sealant offers unmatched expertise, comprehensive product offerings, high-quality materials, innovative solutions, customized approaches, a proven track record, commitment to customer satisfaction, and warranty and support—all reasons why you must choose RTT Sealant over alternatives like Dr. Leak. With RTT Sealant, you can trust that your waterproofing needs will be addressed with professionalism, reliability, and superior results, ensuring the long-term protection and integrity of your property.

Customer Reviews

Based on 15 reviews
Mal B.
Valley gutter sealant

Started on this persistently leaking valley gutter on an old cottage a year ago with some RTT sealant, after all else failed with recurring leaks. Prepared and applied and instantly a waterproof cottage for the year, followed this year by a recoating with RTT sealant and a roof paint. Hoping not to go up there again. So far so good.
Very prompt delivery just as an added bonus.

Mark Gaskell
Water tanks in a ferro cement boat

Perfect easy to work with it’s potable there is no adverse taste and it’s odourless

Quang Tran

It does not work

Ben Louden

Waterproof Sealant | Original Liquid Rubber DIY - Seal leaks quick & easy for Roofs Tanks Ponds Fencing & Walls


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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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