Waterproofing implies applying a thick waterproof layer to the surface of the building structures and commercial/residential facilities to ensure thorough protection from water and corrosive liquids. Waterproofing boosts efficient operation of buildings, structures and equipment, increases their reliability and useful life.
From a functional point of reference there are two types of waterproofing to be defined: anti filtration one, designed for protection against the ingress of water into the underground and underwater structures, leakages of the operating, technical or waste water; and corrosion waterproofing that aims at protecting structures from chemically aggressive liquids and water, the harmful effects of the atmosphere.
By structural features waterproofing is divided into superficial, that aims at reinforcing structure interfaces, and multi-purpose one. By the type of material used, waterproofing is divided into asphalt, mineral, metal and plastic types.
By the method of waterproofing is subdivided into:
- Paint waterproofing (hot and cold) is performed in the form of a thin, 2 mm multilayer coating commonly bituminous and polymeric coatings and paints for corrosion and anti-capillary protection of concrete and metal structures. The method is utilised in roof coating and roof waterproofing.
- Backlining waterproofing, where roll materials produced as multilayers (and typically comprised of 3-4 layers) with mandatory protection coating surface and the wall ties.
- Cast waterproofing, usually produced from a hot mix of asphalt mastic and casting. The solution is applied on horizontal bases (2-3 layers with an average thickness of 20 -25mm), filled to the walls or on the walls’ formworks (30 – 50mm thickness).
The Benefits Of Anticorrosive Paints Revealed
To provide protection against corrosion of reinforced concrete and steel structures, equipment, bridges, pipelines and storage tanks, one can resort to moisture-curing polyurethane systems. The innovative products, supplied to the market by seasoned players, such as Britannia Company, specialising in mass production of roof waterproofing and roof coating materials, provide unique properties that allow applying anti-corrosion coatings in the extreme conditions:
- High humidity, up to 99%
- Low temperatures (up to -7°C)
- Applying to poorly refined metal surfaces with purity level starting from St2
- Wet concrete surfaces
- Applying the materials to old paint layers
The benefits of one-component polyurethane
One-component polyurethane anticorrosive coatings, represented on the market widely, provide a range of significant advantages: reducing the cost of painting, user-friendliness in tough coating missions, e.g. roof coating, reducing the compelled downtime of the equipment that needs painting and prevent loss of time and increase productivity of the contractor carrying out painting work. Moreover, polyurethane is particularly valued for:
- Single component nature, which eliminates the possible errors in the preparation of the working composition for anticorrosive coating
- An ability to be applied in low temperature/excessive humidity/fog conditions
- A set of excellent anticorrosive insulating properties when applied to old paint, preserving the integrity of the layer of old paint with no need for swelling
- Single-component polyurethanes are cured at temperatures up to -7°C
- No restrictions on the temperature difference between the dew point during application of anticorrosive paint
- Excellent penetrating ability in applying to tight rust grip
- Excellent thermal resistance of paints (up to +160°C)
- The availability of various methods for applying: airless/air spray/brush/roller and etc.