Polyurea Spray Coatings

Polyurea spray is being recognised internationally as the ultimate coating system for roofs, basements, bunds, steels, tank linings and other applications.

Polyurea Roof And Deck Waterproof Coatings

The durability and flexibility of polyurea coating means that it can be used in some of the harshest conditions in the world including hulls of ships and barges, aircraft carrier decks and North Sea oil rigs/platforms for corrosion protection, pipe work protection and asbestos encapsulation. As a spray on waterproofing method, it can be applied to several surfaces with ease and with accuracy.

Polyprufe is part of the MacLennan range of waterproofing systems and provides the following benefits:

  • Environmentally Safe
  • No Solvents
  • No Emissions
  • No Voc

The polyurea spray on waterproofing system has been further developed over the last 20 years for use in the waterproofing industry for basement waterproofing, tanking, reservoir lining, roof and deck waterproof finishes, concrete and steel protection, tank lining and bund lining.

Polyprufe is fast curing which allows for quick installation even at very low temperatures and is water insensitive. Polyprufe creates a high quality, waterproof, elastic-sprayed membrane which has many advantages over traditional waterproofing systems. It is very cost-effective when compared to conventional solvent-based products.

Polyprufe is hot spray-applied by MacLennan through a Plural Component Proportioning system. Once the Polyprufe coating has been sprayed, it can take foot traffic after 10 seconds and light vehicular traffic after a few hours. Polyprufe coatings and linings are a polyurea based, high end, seamless, elastomere, which has exceptional mechanical properties and chemical resistance and durability.

Key Points: Waterproofing Applications:

  • Podium deck
  • Roof waterproofing membrane
  • External Type A waterproofing
  • Parking deck waterproof membrane
  • Bridge decks membrane
  • Water retaining pond lining linings and other uses
  • Internal tank lining and protection
  • Waterproof floor coatings including non-slip flooring for commercial and industrial premises
  • Chemical resistant coating for tank and bund lining
  • Retention pond lining
  • Swimming pool lining
  • Encapsulation of hazardous materials such as asbestos

Advantages of the Polyprufe Waterproof Lining System:

  • Fast curing, being able to take foot traffic in seconds and vehicular traffic in hours.
  • Strong with high mechanical and abrasion resistance.
  • High elasticity, allowing movement without leaking.
  • 100% Waterproof membrane.
  • High chemical resistance suitable for oils, petrol, acids and many other liquid chemicals.
  • Fast hardening, allowing rapid application and minimal downtime.
  • Very good adhesion on both concrete and metals, even when damp.
  • Vertical and horizontal application using spray application.
  • Hydrophobic and therefore unaffected by damp substrates when creating non-bonded waterproof liners.
  • Can be sprayed at temperatures as low as -30° C with minimal effect on tack free time.
  • Can be built up to any thickness in one application including vertical and overhead applications.
  • The cured elastomer has a high thermal stability with constant working temperatures up to 130° C and intermittent temperatures up to 160°C
  • The spray on waterproofing method provides more precision and even coating

Get in touch with our technical team today!

Compare polyprufe:

  • Polyurea vs Polyurethane

    Polyurea is closely related to polyurethane. Both are two component systems made with Isocyanate-based materials. The second component in polyurethane is polyol resin, the other component is Polyurea which is a polyether amine. In terms of performance, conventional polyurethane requires a catalyst, which is sensitive to temperature and moisture. Low temperatures can slow the reaction time and moisture can interfere with the reaction causing blistering and other negative effects.

    Polyurea, on the other hand does not require a catalyst. Reactivity for these coatings is fast, is typically 3-10 seconds.

    Polyurea can be sprayed at -20 but where primers are required they need a temperature of 5 degrees.

  • Polyurea vs Epoxy

    All epoxies require a catalyst. They are sensitive to temperature, humidity and moisture, giving them a narrow window for application. Epoxies generally have extensive cure times, requiring more downtime and greatly increasing the time required for multiple coats. Unlike Polyurea, epoxy coatings offers little or no elongation properties – thus leading to the frequent failure of the coating with expansion or movement of the substrate occours.

  • Polyurea vs Cementitious

    There are a number of cementitious coatings available. They are mostly trowel or brush applied, although some can be sprayed applied. Some claim a degree of flexibility, but cannot provide the flexibility or elastic properties of Polyurea. All cementitious coatings have long setting and curing times. Cement based screeds can be made waterproof with additives such as SBR but they are then expensive and have long drying times.

  • Polyurea vs Asphalt & Bitumen

    Unlike Polyurea, Aspalt and bitumen systems either require hot works or are multi layered. They require a longer period of time to lay and do not have the durability of Polyureas. Polyprufe is a seamless membrane that can be handled and walked on within 10-12 seconds of application.

  • Polyurea vs Methyl Methacrylate

    Polyprufe is far more durable than Methyl Methacrylate, has less odour is more resistant to impact and abrasion.

Why should I work with MacLennan?


We Design, supply and install. There's no split responsibility with MacLennan.


MacLennan live and breathe waterproofing, have a look at one of our free CPD seminars and find out!


MacLennan has the most comprehensive guarantees and insurances in the industry.

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