black liquid rubber coating being applied

Liquid rubber coating uses liquid rubber to protect and waterproof

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 rubber waterproofing paint for roofs, there are now products which allow the excellent waterproofing capabilities of liquid rubber coating to be applied to a much broader range of substrates.

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 the UK.

The top 6 benefits of liquid 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:

  1. GREAT ADHESION – Liquid rubber paint 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. NON-PERMEABLE – Liquid rubber paint creates 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.
  3. FLEXIBLE – Liquid rubber coating 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.
  4. UV STABILITY – The coating stays flexible for longer and does not chalk, embrittle, or lose strength with exposure to UV radiation.
  5. CHEMICAL AND WEATHER 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.
  6. ENVIRONMENTALLY FRIENDLY – Water based and VOC free, these products will not harm you or the water table.

Application method for a waterproof liquid rubber paint

One of the great benefits of liquid rubber coating 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

applying white liquid rubber coating as a rubber waterproofing paint for roofs

White liquid rubber coating reflects UV, keeping the substrate cooler

A properly prepared substrate is paramount to the optimal application and performance of a coating. In the case of liquid rubber coating 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: Application

Liquid rubber paint 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 coating can be applied with a brush, trowel, roller, or spray, and is cold applied. The minimum layer thickness for a waterproof membrane is 2mm. When painting, the average coverage is 1L per m2, yielding a 1mm thickness. The coating is not applied in one thick coat but rather built up through layering.

Step 3: Curing

Once the liquid rubber coating 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.

An example: Rubber waterproofing paint for roofs

Because of the unique combination of versatility, flexibility, and high performance, there are many areas which can benefit from liquid rubber coating, 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 paint for roofs 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 3mm use a joint filler or mastic to fill them in.
  3. At an expected coverage of 1L to 1m2, 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.

Where to buy liquid rubber paint in the UK

Liquid rubber coating is available from suppliers across the UK, for all projects great 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 liquid rubber paint, or would like to be connected with one of our partners, get in touch! Our experts are here to help, just use our free quote service to find the right coating solution for your needs.

Liquid rubber coating productProduct descriptionPrice
EcoProof 20 Liquid Rubber Waterproof MembraneSuitable for flat roofs, pitched roofs, domestic, industrial and commercial uses, and structural waterproofing£70-80/5L at 1L per m2
Pro Guard Liquid Rubber EPDMSuitable for recoating EPDM roof membranes, troweled concrete, weathered metal roofing, foam and more£110-120/3.8L at 1L per m2
Rubber Roof Liquid Flexible Waterproof CoatingSuitable for flat roofs, pitched roofs, industrial, commercial, and domestic uses, and structural waterproofing£60-70/5L at 1L per m2

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