Collection: Commercial Roofing Sydney

Waterproof Your Commercial Roof In Sydney

Is your roof rusty, leaking or worse, both?
Do not replace your roof, seal it with our RTT sealing solution for costs as little as a quarter of the cost of a replacement. 

Our products are manufactured by us in Australia since 2008. Top Quality waterproofing sealant and UV protection Top Coat Membrane in any Colourbond colour.

  • - Saves tens of thousands of dollars. 

  • - Provides heat reflection and UV protection. 

  • - No costly building inspectors.

  • - No shutting down the business (Products applied while you are trading).

  • - All leaks are sealed and warranty for minimum 10 years with options for 15year+

  • - Saves power on cooling cost. Cools building down by 20-40°C.

RTT Concrete, Metal or Matt Tile Commercial Roof Restoration Roofing in Sydney


RTT Sealant Commercial Roofing Video

Up to 40% off Commercial Roofing Projects

Whether it is a roof leak, roof repair, maintenance, box gutter restoration to full roof restoration for your commercial roof. RTT Sealant now based in Sydney has you covered with specialist waterproofing and UV protection membranes to suit your commercial metal or concrete roof.


    Most roofing specialist are approx $1500+gst per small repair job where at RTT Sealant we offer a 40% reduction on that cost. The larger the job the more is in your pocket.

  • Box Gutters

    The average approx price per linear metre is between $250-$300+GST. RTT Sealant is between $150-$200+GST per linear metre a Whopping 40% reduction.

  • Commercial Metal Roof Restoration

    Re roofing is not only costly at $200-$300+GST per sqm the time vacating the premises in loss of income could amount to tens of thousands of dollars. Our cost per sqm can be as low as $80+GST per sqm metre and we are done within 3 weeks. Any commercial property, business, hotel, shopping centre, government building, airport, etc needing commercial roof restoration to rusty, cracked, holes, screwing sheets, etc our waterproofing sealant technology is the right combination of quality products and experienced special that apply our products along with our long standing reputation in the industry.

  • Commercial Concrete Roof Restoration

    Valued at over $200+GST per sqm our current price is only $140+GST per sqm. Commercial concrete roof restoration requires a different approach than a commercial metal roof. The prep work require a specialist in repairing cracks, joins and holes prior to primer and our UV protection Top coat.

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  • Step 1:

    Clean all surfaces free of dirt, oil, and impurities and allow the surface to dry. Water blast or wire brush any stubborn debris or rust. For concrete commercial roof surfaces, prime with a quality 2-part epoxy.

  • Step 2:

    Blob all screws/bolts on your commercial metal roof using our RTT - Waterproof Sealant with a gloved finger.  Use our RTT - Quick Dry to spray on the Sealant for a quick cure or the product and also to protect against approaching rain. 

    Allow to cure for 24h.

  • Step 3:

    Cover and Sandwich the RTT - GEO Textile with our RTT - Waterproof Sealant over seams, vents, joints, skylights etc on your commercial metal roof. (Use our RTT - Seam Tape to cover bigger holes)

  • Step 4:

    If the commercial or metal roof is new and painted, use RTT - Primer/Sealer to prime the roof. If the commercial metal roof is old or rusty for your business, complex, shopping centre, you MUST use the RTT - Rust Inhibitor Primer to stop the rust from bleeding through.

  • Step 5:

    Coat the entire commercial metal or concrete roof (min. 2 Coats) with the eco-friendly, UV protective, heat reflective and power-saving RTT - Protective Top Coat in 2 opposite directions.

    Allow curing for 4-6h before applying the second coat. 

  • Step 6:

    Clean Up:
    The Top Coat and the Primer are cleaned with water. Use our RTT - Sealant Cleaner to remove any spillage, drips or splashes of the RTT - Waterproof Sealant.

  • Trade Tipp:

    This Top Coat should only be applied in warm weather over 20*C. To avoid bubbling and non-curing, DO NOT apply products when there’s dew, cold wind or rain! It is optional but required during cold months of the year to select a shale grey colour rather than white.


How much product do you put on?

RTT Sealant put on a minimum of 2L/m2 of RTT - Waterproof Sealant for concrete surfaces closer to 2.5L/m2 and 2L/m2 for metal roofs.

RTT Sealant will paint/roll/spray a minimum of minumum of 0.5L/m2 RTT - Protective Top Coat for concrete or metal surfaces.

How long does it last & any warranty?

We've been testing and improving our products since 2008. When properly applied the Waterproof Membrane will extend the life of your Roof by 10+ year. RTT Sealant prides ourselves with providing excellent Warranty options of 10 and 15 year with an inspection every 2 yrs to maintain the integrity of the roof membrane.

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 the product from approching rain.

DIY is not an option for you?

We work with accredited contractors and take on large commercial projects. We have done projects for Coles Group, Dreamworld, Australia Fair, Brisbane Airport, Ampol, Optus and much more.

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