black liquid rubber paint on a paint brush

Liquid rubber paint protects and waterproofs almost any surface

Liquid rubber paint has been on the market for years now, but recent technological advances have both improved and expanded the range of liquid rubber available. While traditionally liquid rubber has been applied as a waterproof roofing solution, there are now products which allow the excellent waterproofing capabilities of liquid rubber paint to be applied to a much broader range of substrates such as wooden decking.

Liquid rubber paint is heat, chemical, weather, and impact resistant, as well as being flexible. In this article we will outline the benefits and applications of liquid rubber coating products, as well as where to find them in Australia.

Liquid rubber paint and its top 6 benefits

The reason for the continued success of rubberised paint is simple: in terms of waterproofing it outperforms the alternatives. This is why one of liquid rubber’s most important applications is flat roofing. The qualities that make liquid rubber paint the choice for waterproofing are:

liquid rubber paint does not let water through

The #1 reason to use liquid rubber paint is its ability to make surfaces 100% waterproof.

  1. Highly-adhesive – Liquid rubber can be applied to concrete, stone, metal, bitumen, EPDM, wood, PVC, metals, and zinc. It adheres fully to the substrate whatever the material, sealing the substrate and keeping corrosive elements away.
  2. UV stable – The coating remains flexible for longer and does not chalk, embrittle, or lose strength as a result of exposure to UV radiation, even as strong as in Australia.
  3. Weather and chemical resistant – Rubber is chemically resistant to most corrosive chemicals, acids, alkalis, and solvents, both liquids and gases. Liquid rubber can protect a substrate from chemicals in tanks, as well as corrosive environments like factories or plants. The heat resistance, waterproofing, salt resistance, and UV stability mean liquid rubber is extremely weather-proof.
  4. Environmentally friendly – Water based and VOC free, these products will not harm you or the nature.
  5. Non-permeable– Rubber coatings create an impermeable barrier between the substrate and the environment. They can withstand ponding water for flat roofs, or be used in overspill containment. They are waterproof, vapour tight, air and gas barriers.
  6. Flexible – Liquid rubber has an elongation capability of up to 900%. It can flex and stretch with a substrate through heating and cooling from -40°C to 160°C without damaging, unlike other coatings such as bitumen which are far more brittle.

The 3 basic steps of applying liquid rubber coating

One of the great benefits of liquid rubber is the ease of application. There are only three basic steps to a liquid rubber application. Whether spray, brush, trowel, or roller, the coating will adhere to almost every surface – concrete, stone, bitumen, EPDM, wood, PVC, metals, foam, tile, and zinc.

Step 1: Surface preparation

Poor surface preparation may result in failure of the coating system; adhesion is affected leading to preventing optimal performance.

A properly prepared substrate is paramount to the optimal application and performance of a coating. In the case of liquid rubber the substrate needs to be clean, dry, free from grease, dust, and other particles. Power washing the area is recommended. Cracks in the surface should be repaired beforehand for the best waterproofing result.

Step 2: Coating application

Always study the manufacturer’s instructions on application and obey them.

Liquid rubber should not be applied in temperatures below 5°C, nor when rain is expected within 24 hours, so make sure to check the weather. The liquid rubber paint can be applied with a brush, trowel, roller, or spray, and is cold applied. The minimum layer thickness for a waterproof membrane is 2 mm. When painting, the average coverage is 1 L per m2, yielding a 1 mm thickness. The coating is not applied in one thick coat but rather built up through layering.

Step 3: Film curing

Stick with the given curing times; too early traffic on the coated area may result in coating failure and have a great financial impact.

Once the liquid rubber is applied, it needs to cure. Though it is touch dry in only a few hours, it will take 48 to 72 hours for the coating to be fully cured and bonded to the substrate. After this point usual traffic and usage may resume.


Use rubber coating to waterproof a flat roof

Because of the unique combination of versatility, flexibility, and high performance, there are many areas which can benefit from rubberised paint, including roofing, concrete sealing (and protecting steel reinforcement), environmental protection barriers, and waterproofing ponds, planters and basements. It is even used for the crocodile pond at Currumbin Wildlife Sanctuary on the Gold Coast.

The benefit of having a liquid rubber waterproofing coating installed is that there is limited down time, limited work hours, and so limited extra costs. The basic application process for waterproofing a flat roof might look as follows:

  1. Power wash the area to be coated and, once dry, clean the area of all debris and particulates.
  2. If there are cracks greater than 3 mm use a joint filler or mastic to fill them in.
  3. At an expected coverage of 1 L to 1 m2, pour the desired amount of liquid rubber onto the roof, and spread across the area using a roller or brush. Once the roof is coated evenly, leave to dry.
  4. Once the first layer is touch dry, repeat the procedure for the second coat.
  5. Leave for 48 hours to cure fully.

Professional waterproofing with liquid rubber – certification in Australia

Applying liquid rubber roof is usually a waterproofing job, and therefore, requires applicators to be appropriately certified. In Australia certification is needed when protective treatment (such as liquid rubber paint) is applied to a dwelling with the purpose to protect from water or moist.

Thus, if you are looking for a professional contractor for applying liquid rubber, check for (one of) the following certificates:

  1. CPC31411/ CPC31408 Certificate III in Construction Waterproofing
  2. BCG31403 Certificate III in Waterproofing (General Construction)
  3. Qualification 90464 Certificate III in General Construction (Waterproofing) TAFE course #8126

Get your hands on liquid rubber in Australia

Liquid rubber paint is available from suppliers across Australia, for all projects big and small. There are contractors up and down the country who provide liquid rubber installation services for roofing, waterproofing, and any other project you may have. If you wish to buy rubber coating, or would like to be connected with one of our partners, get in touch! Our experts are happy to help, just make use of our free quote service to find the right coating solution or service for your project.

Liquid rubber paint productPrice (RRP)Substrates
Plasti Dip® Aerosol Spray$20.00 (311 g)wood, metal, glass, rope, plastic, rubber, concrete, tools, etc.
Leak Seal Flexible Rubber Coating$15.90 (980 ml)gutters, roofs, flashing, ductwork, PVC, masonry, concrete and more
Motospray Peel Coat$100.00 (3.78 L)metal, plastic, glass and more
Removable Rubber Paint$33.99 (400 ml)metal (vehicles)
32 replies
  1. Bryan Marshall
    Bryan Marshall says:

    I have a 7 year old motor home with a EPDM rubber coated roof. Would liquid rubber extend the life of my roof? Where in north Queensland can I buy this product? How dark is the grey, my existing roof is white – what would you recommend?

    Reply
    • Ayold
      Ayold says:

      Dear Bryan,

      Thank you for your inquiry about liquid rubber roof coating. In general a liquid rubber roof coating will extend the life of your roof. If your roof is currently damaged or the current coating is beginning to fail you need to take extra steps before applying another coating. The Liquid Rubber brand is available in Queensland based companies. If your purpose is to change the colour, you could use acryclic or latex paint designed for exterior surfaces.

      Best regards,
      Sofia – Coating.com.au

      Reply
      • Bryan Marshall
        Bryan Marshall says:

        Thanks, I am happy with the white of the existing roof, is liquid rubber available in white, or would I need to paint it later?

        Reply
        • Ayold
          Ayold says:

          Dear Bryan,

          Liquid Rubber is indeed available in white as well as grey and black. Good luck with your roof and happy travels!
          Best regards,

          Sofia – Coating.com.au

          Reply
          • Bryan Marshall
            Bryan Marshall says:

            Hi, I am now in Melbourne and in a position to do this job. WHITE Liquid Rubber is what I need, please confirm that this is compatible with my EPDM roof and can go straight on to it once it is properly prepared. Roof size is approx. 18.75 sq m. How much product would I need please? Do you freight to Melbourne, or is there a supplier that I can pick-up from in Melbourne?

          • Ayold
            Ayold says:

            Dear Bryan,

            We at Coating.com.au are not suppliers of coatings. We connect coating projects with the right coating manufacturers for their requirements. For your needs we recommend you get in touch with a campervan and motor home professional like Vanseal who specialise in protective and insulating coatings using liquid rubber. We hope you find what you are after, and enjoy your future adventures!
            Best regards,

            Anne-Kathrin – Coating.com.au

  2. John Amato
    John Amato says:

    Hi I am just in the process of finishing my bus/motorhome conversion and I am wanting to seal the roof.
    It is a painted metal roof that I have treated for rust and pressure cleaned ready for coating.
    I am looking for a product that has movement,heat repelant and a seal the roof.
    The colour I would like is light to mid grey.
    Does the product have a gloss finish and could it be pressure cleaned if need be in the future.

    Cheers John

    Reply
    • Ayold
      Ayold says:

      Dear John,

      There are a number of products available in Australia suitable for sealing your motorhome roof, such as VersEseal Liquid Rubber. It is a roof sealant with flexibility and heat resistance that comes in a matte grey finish. If the pre-existing paint on your roof is very glossy, you may have issues with coating adhesion. We do not recommend pressure cleaning the liquid rubber coating, better to be safe than sorry and wash by hand.
      Good luck with your project, and happy travels!
      Best regards,

      Rhiannon – Coating.com.au

      Reply
  3. Tony Stumm
    Tony Stumm says:

    I have a 13 foot aluminium boat which leaks. Would liquid rubber be the solution? The boat is on a trailer and wear would occur to the underside when it is launched or retrieved.Would this be a problem

    Reply
    • Ayold
      Ayold says:

      Dear Tony,

      A liquid rubber coating or a truck bed liner coating might protect your boat from leaking if applied to the inside not the outside, but we would recommend you also fix the source of the leaks. A sealant or caulk applied to problem seams or rivets will provide added protection. We do not recommend applying liquid rubber to the underside of your boat. A boat patch epoxy or sealant can be found at most local boat shops. With the right product you can get the problem solved and back on the water in no time.
      Best regards,

      Rhiannon – Coating.com.au

      Reply
  4. Brian Thompson
    Brian Thompson says:

    I have a wooden boat and the hand rails are Tasmanian Oak. They are showing sign of weathering with cracks in the direction of the grain.
    They were initially varnished and several years later painted because the cracks kept coming back.
    The paint did not fix the problem even after going back to bare wood.
    Will your liquid rubber coating seal the surface and stop the cracks from re-appearing ?
    If so what do I need to do in the way of surface preparation ?

    Reply
    • Ayold
      Ayold says:

      Dear Brian,

      Weathering is always a risk with wooden surfaces exposed to the Australian climate. Paint and varnish may cover the problem temporarily but if you want to solve the problem long term you will need to treat and fill the cracks before recoating the woodwork. Sand the wood back again and use a filler, such as a thickened epoxy filler, to seal over the cracks and prevent them reopening. Your local boat shop should have a number of options and a knowledgeable staff.
      We do not recommend liquid rubber for this purpose. Once you have filled the cracks we recommend coating the wood with a UV resistant polyurethane marine varnish. This will keep the wood looking good and protect it from the sun.
      Good luck with your boat!
      Best regards,

      Rhiannon – Coating.com.au

      Reply
      • Brian Thompson
        Brian Thompson says:

        Many thanks for the reply. I am in the process of going back to bare wood and sealing the cracks.
        I have a second problem with the foredeck. I originally coated the bare marine plywood with fibreglass cloth and then painted the surface wit a slip resistant paint.
        The normal wear of the antislip surface requires re-painting every year. Would I get a longer time between painting if I used a rubber paint ?
        Is there a rubber paint you recommend ?

        Regards,
        Brian

        Reply
  5. Mick
    Mick says:

    Hi, I have a solar panel problem;
    The protective membrane on the back is UV defective with cracks forming. The underneath does not get wet but working at 500v the overnight humidity provides sufficient earth leakage to prevent the system starting in the morning.
    I see this product is non flammable and will tolerate 160 deg C. I am thinking of applying a resealing layer before summer ends, at sunset on a 30+ degree day to ensure all moisture has been expelled.
    What are your thoughts is it worth a go?
    • Will a primer be needed?
    • How thick should the covering be? 20 panels 1.6m x 800mm to do.
    • How long would you expect the coating to last before the need to recoat?
    • Will there be any corrosive action contacting glass, Al frame, silicon solar cells, tinned copper and soldered tracks?
    This issue is only growing; many others will start experiencing this issue very shortly.
    Regards
    Mick

    Reply
    • Ayold
      Ayold says:

      Dear Mick,

      Though all your reasoning seems perfectly sound, we would not advise that you apply this coating without contacting the manufacturers of your solar panels to find out what their recommendation for the problem is first. We would not want you to accidentally impair the function of your solar panels or invalidate any warranty or assistance that the manufacturers might give. Best of luck with your problem!
      Cheers,

      Jasmin – Coating.com.au

      Reply
  6. Geoff
    Geoff says:

    We are looking to seal the upper deck of a 20m Aluminium boat. It has previously had carpet glued down with Artificial Turf Glue. Would the remnants of the glue need to be removed before applying your sealant? Once deck has been repaired and sealed, we then wish to replace the carpet with the same glue.
    About 95% of the deck is covered in carpet, the remainder (boundaries etc) we would like to paint with Epoxy undercoats and 2 pack polyurethane top coats.
    Other substances that the sealant would be exposed to in small areas, Fiberglass, Polyurethane sealants (Sikka), existing painted areas (Polyurethane and epoxy)
    The total area we wish to ensure is 100% waterproof is approx. 120m2
    Are any of your products suitable?
    If you wish to contact me in reference to the job , Ph. 042 703 9126. Geoff.

    Reply
  7. shane
    shane says:

    Hey i am doing a horse stable floor with rubber crumb i was wondering if this was rolled or troweled over the rubber crumb if it would hold up to the horses walking and pouring on it also…

    thanks heaps

    Reply
  8. Erhard Dehmelt
    Erhard Dehmelt says:

    I need 4 litres of liquid rubber for a roof repair job in Port Pirie, SA. Where is your nearest stockist?

    Reply
  9. George
    George says:

    Hi
    I have a boat and the roof is leaking. The roof of the saloon is fibreglass topped with a layer of thin teak strip to make a faux teak deck. People walk on this roof/deck as its part of the flybridge. The teak is screwed down and water is getting in through these screw holes. The teak is badly worn and needs replacing. I have to ultimately remove the teak and reseal the deck, however I was hoping you could recommend a rubberised coating that I could paint over the existing teak to buy me a little time before I have to bite the bullit and rip the old teak up and start again

    cheers

    Reply
  10. Noelene Rees
    Noelene Rees says:

    I am a newbee to cosplay and have been told liquid rubber is a way to seal eva foam costumes are made of. The Americam version is called flexbond. Would your priduct work in this situation. Thank you.

    Reply
  11. Rod
    Rod says:

    Hi. I have a Lexus vehicle and a section of the interior door panels is melting/deteriorating – becoming soft and chipping easily and rubbing off on hands/clothes. This is a bit of a problem for Toyotas as will from that mid to late 200 period. Would a liquid rubber coating make the surface more resilient to chipping/scratching/melting?

    Reply
  12. Angus
    Angus says:

    Hi, where can I buy Leak Seal Flexible Rubber Coating
    $15.90 (980 ml) in Sydney. from cbd to inner west, thankyou.

    Reply
  13. John
    John says:

    I have a water feature pond by the pool, cement rendered brick construction with a rubberized bitumen waterproofing layer painted over a prep layer with a fabric reinforcement. I had stopped using the water feature some years ago during severe water restrictions and over the years the water evaporated and parts of the bitumen rubber have perished, cracked and lifted, while other parts are still good.

    Will I need to completely remove the old bitumen/rubber and fabric layer and re-prep the entire pond? Looking into this it would seem to be a professional job needing the old layer to be heated etc.

    Or could I leave the good rubber layer where it is stuck fast and prep over it (or just the bare concrete rendered areas, with appropriate corner units) and the repaint the lot with a new complete coating of rubberized bitumen?

    Regards

    John

    Reply
  14. Ashlyn
    Ashlyn says:

    Hi, we have a concrete pool surround that was meant to be boned but the contracted stuffed up and left us with a tinted sealer concrete slab that has various 0.5-2mm cracks throughout.

    Would a rubberised paint be an effective and useable surface sealer for out concrete pool slab? The tinted sealer that’s currently on there is starting to wear where the cracks are and we’re worried this will only get worse.

    Thanks.

    Reply
  15. Dawn Mayes
    Dawn Mayes says:

    Hi, I have a steel boat and I want to coat the deck. Will this product be weather resistant, non slip, foot traffic resistant and (for bonus points) be ‘soft feel’? Thanks

    Reply
  16. Trevor Hunter
    Trevor Hunter says:

    Hi
    I am a PhD student at the University of Queensland. I am doing a project where I need to have conductive rubberized paint on a screen of Lycra. The screen has to be flexible to allow flex sensors to bend and get a variable reading to create music. I am trying to get instant interactive readings by having conductive paint across the centre of the screen and because the interaction with the screen is pressing at multiple and various positions on the screen the paint needs to be flexible.

    Would the paint you mentioned above be able to be painted onto Lycra and still maintain its flexibility and also if graphite or carbon fibres were added to it to create conductivity would it lose any if its flexible qualities.

    Even better, would you know of any such product that may have both the qualities I am looking for.

    Kind Regards

    Trevor

    Reply
  17. Peter
    Peter says:

    We have a houseboat with some leaking issues on the roof. Is your product suitable to seal the roof? Can you walk on the product once completed? How long will the product last?

    Reply
  18. Graeme
    Graeme says:

    Hi. We are fixing up an elderly houseboat with a cabin made of wood frame, plywood sheeting and fiberglass matting and gel coat. The roof seems to be generally ok but you can see the fiberglass and we want to waterproof it for long term peace of mind and better looks. The roof area is about 9m by 3.5m. Can we use white liquid rubber for this project, how much would we need, where can we get it in the Sydney area, and can you walk on it normally?
    Thanks.

    Reply
  19. Stewart
    Stewart says:

    Hi, I have some black rubber mud flaps that have the manufacturer’s marque displayed in white. The car is under restoration and I’d like to re-paint the white highlights. What would be the most appropriate product of yours?

    Reply
  20. Martin Espie
    Martin Espie says:

    I’m a roofer, that works for L & K roofing. Licenced roofer. We work out of the tweed/Gold Coast area.

    I’m needing a supply of rubber paint for a clients caravan. They want entire caravan’s external surface sprayed with rubber water proofing paint.

    Please contact me today with details due to my work load and these particular clients wanting job done by next week.

    Reply

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