Collection: Box Gutter Seal

Waterproof Your Box Gutter DIY | Box Gutter Repair Solutions in Australia

Discover effective solutions for box gutter repair and leaks with RTT Sealant. Protect your property from water damage from box gutters with our specialised products. Browse our products for reliable gutter repair solutions in Australia. Box gutters damage costs thousands to repair. Up to $750 a lineal meter or more.

Deterioration or corrosion is due to foot traffic, denting and damaging of box gutters making it bow and causing ponding in areas which turn into rust and corrosion.

Our Box gutter repair sealing solution will eliminate air and moisture and prevent further rust from forming. The application encapsulates the entire box gutter giving it a seamless waterproof membrane that is not affected by ponding.

Stop Box Gutter leaks now and avoid costly future damage and corrosion. 

Find all products needed to waterproof your Box Gutters below and call us for a quote to fix your box gutter leak.↓

  • A fraction of the price of a box gutter replacement with a 10-year warranty.

  • Never have water penetration again, easy maintenance.

  • No workplace shutdown (no opening of the roof)


RTT Box Gutter Repair Products

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  • Step 1:

    Make sure the surface of the box gutter repair project is free of old membranes or silicones and is clean and dry. The best practice is to power wash the surface.

  • Step 2:

    Now its time do your box gutter repair and we Cover and Sandwich the RTT - GEO Textile with the ultimate waterproofing sealant over seams, vents, joints, rust holes etc. (Cover bigger holes with the RTT - Seam Tape and large rusty areas with a 0.55mm galvanised plate - use RTT - Waterproof Sealant underneath the plate and pop the rivet in position.  Cover the edges of the plate of the box gutters with the Sealant and sandwich the RTT - GEO Textile in between.

    Allow to cure for 24h hours and is your first step of defense against box gutter leaks.

  • Pouring the liquid rubber straight out of the bucket into the boxgutter and using a roller to spread the rubber over the entire surface. After that spraying RTT - Quick Dry onto the rubber for a quick cure.

    Step 3:

    Apply the first coat of RTT - Waterproof Sealant (1mm thick) over the entire box gutter and the sides underneath the roof. Use a Brush, Roller or Spray machine. Apply RTT - Quick Dry for faster curation of the Sealant and if rain is imminent. 

    Allow curing for 24hours and is your first layer of your box gutter repair.

  • Step 4:

    Apply the second coat of RTT - Waterproof Sealant and broadcast RTT - Grit (0.5mm stones) onto the Waterproof Sealant. The RTT - Grit ensures a mechanical and an adhesive bond between the Waterproof Sealant and the Traffic seal. 

    Allow curing for 24 hours.

  • Step 5:

    Sweep or blow (leaf blower) the loose stones away.

  • Step 6:

    Prepare the Traffic Seal Mixture and pour it into box gutters and spread it out with a roller or squeegee over the entire box gutter and the sides underneath the roof.

    Traffic Seal Mixture Instructions: Mix 2kg RTT - Traffic Seal Hardener with 1.5 - 2L of Water and stir well with a drill mixer. Pour the mixture into the 15L RTT - Traffic Seal bucket and stir it well with the drill mixer.

    Note: The Traffic Seal Hardener starts to react immediately after mixing it with water. Use up the product within 2 hours.

    Allow curing for 24 hours and your box gutters are nearly complete.

  • Step 7:

    Apply the second coat of the Traffic Seal Mixture over the entire box gutter and underneath the roof and your box gutter repair is complete.

  • RTT Sealant specialist box gutter repairs

    When it comes to repairing box gutters on your Roof Top Tent (RTT), RTT Sealant stands out for two crucial reasons: the exceptional quality of their Australian-made products and their status as a family-owned business with over 15 years of experience in the industry.

    Firstly, RTT Sealant takes pride in offering high-quality products that are manufactured in Australia. This commitment to local production ensures that their sealants meet the highest standards of quality and reliability. By sourcing materials locally and adhering to stringent manufacturing processes, RTT Sealant guarantees that their products are specifically tailored to withstand the unique challenges posed by Australian climates and conditions.

  • Pouring the liquid rubber straight out of the bucket into the boxgutter and using a roller to spread the rubber over the entire surface. After that spraying RTT - Quick Dry onto the rubber for a quick cure.

    Australian owned and run box gutter repair applicators

    Secondly, RTT Sealant is not just a business – it's a family affair. With over 15 years of experience in the industry, the team behind RTT Sealant brings a wealth of knowledge and expertise to every project. As trained applicators themselves, they understand the intricacies of box gutter repairs and have honed their skills through years of hands-on experience. This deep-rooted understanding allows them to offer personalized solutions that address the specific needs of each customer.

  • Box gutter repairs done the right way

    By choosing RTT Sealant for your box gutter repairs, you can trust that you're receiving top-notch service from a team of professionals who are dedicated to delivering exceptional results. Whether you're dealing with minor leaks or extensive damage, RTT Sealant has the expertise and the products to ensure that your RTT remains watertight and secure for years to come.

  • Get a box gutter repair quote

    In summary, RTT Sealant's commitment to quality, combined with their extensive experience and family-oriented approach, makes them the ideal choice for box gutter repairs on your Roof Top Tent. With their Australian-made products and expert craftsmanship, you can rest assured that your RTT is in capable hands.


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 roof surfaces , including box gutters, metal shipping containers, verandas, balconies, water tanks, ponds, troughs and much more.

How long does it last?

We've been testing and improving our products since 2008. When properly applied to your box gutters, the Waterproof Membrane will extend the life of your Box Gutter 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 for your box gutter repair.

What is the Seam Tape for?

The Seam Tape is used to cover bigger holes and cracks causing your box gutter leak, 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 the product from approching rain.

What is the Traffic Seal for?

RTT - Traffic Seal is a premium quality, UV protective, seamless, water-based, cementitious co-polymer 3 component coating. It is designed to be mixed with RTT - Traffic Seal Hardener and oxides to produce a high build coating that is highly flexible and very strong. This mixture provides an abrasive resistant, UV stable, durable finish for both interior and exterior applications.

Why do I need to broadcast the Grit?

This specialised RTT - Grit is designed to be broadcasted into a wet layer of RTT-Waterproof Sealant to produce a seamless, non-slip, high grip and water impermeable coating. Enhances adhesion between RTT-Waterproof Sealant and RTT-Traffic Seal as a complete solution for your box gutter repair or leak.

DIY is not an option for your box gutter leak?

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!