Liquid rubber coating protects and seals surfaces
Liquid rubber coating has been on the market for years now, but recent technological advances have both improved and expanded the range of rubber coatings available. While traditionally liquid rubber has been applied as a waterproof roofing solution, there are now products which allow the excellent waterproofing capabilities of rubber coating to be applied to a much broader range of substrates such as wooden decking. In Canada industrial rubber coating for metal is the most common non-consumer use of liquid rubber.
Rubber coating 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 Canada.
The top 6 reasons to use rubber coating
The reason for the continued success of liquid rubber coating 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 coating the choice for waterproofing are:
- Excellent adhesion – Liquid rubber can be applied to concrete, stone, metal, bitumen, EPDM, wood, PVC, and zinc. It adheres fully to the substrate whatever the material, sealing the substrate and keeping corrosive elements away.
- Non-permeability– 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.
- Flexibility – 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 (-40°F) to 160°C (320°F) without damaging, unlike other coatings such as bitumen which are far more brittle.
- UV stability – The coating remains flexible for longer and does not chalk, embrittle, or lose strength as a result of exposure to UV radiation.
- Weather and chemical resistance – 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.
- Eco-friendliness – Water based and VOC free, these products will not harm you or the nature.
How to apply rubber coating and where to pay attention to
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: Preparation
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.
Note: Poor surface preparation may result in failure of the coating system; adhesion is affected leading to preventing optimal performance.
Step 2: Application
Liquid rubber should not be applied in temperatures below 5°C (41°F), nor when rain is expected within 24 hours, so make sure to check the weather. The coating 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.
Note: Always study the manufacturer’s instructions on application and obey them.
Step 3: Curing
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.
Note: Stick with the given curing times; too early traffic on the coated area may result in coating failure and have a great financial impact.
Flat roof waterproofing with industrial rubber coating for metal
Because of the unique combination of versatility, flexibility, and high performance, there are many areas which can benefit from liquid rubber, including roofing, concrete sealing (and protecting steel reinforcement), environmental protection barriers, and waterproofing ponds, planters and basements.
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 metal roof might look as follows:
- Power wash the area to be coated and, once dry, clean the area of all debris and particulates.
- If there are cracks greater than 3 mm use a joint filler or mastic to fill them in.
- 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.
- Once the first layer is touch dry, repeat the procedure for the second coat.
- Leave for 48 hours to cure fully.
To learn more about coating roofs and common products, take a look at our article dedicated to roof protection with coatings.
Find liquid rubber coating products in Canada
Rubber coating is available from suppliers across Canada, for all projects big and small. There are contractors up and down the country who provide liquid rubber installation services for roofing, waterproofing, industrial rubber coating for metal, 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, do not hesitate to contact us! Our experts are happy to help, just make use of our free quote service to find the right coating solution for your project.
|Rubber coating product||Description||Price (RRP)|
|Superflex Rubber Roof Coating||A liquid rubber coating designed for waterproofing roofs, also suitable for EPDM rubber, low and high density polyurethane, aluminum, fibreglass, galvanized steel, cured concrete||$110.00 per gallon|
|Liquid Rubber Cool Foot Deck & Dock Coating||Liquid rubber coating for wooden decking; low thermal conductivity||$69.95 per gallon|
|Dicor White Rubber Roof Acrylic Coating||A rubber reinforced acrylic coating for roofs; waterproofing and heat reflecting||$69.95 per gallon|