Polyprufe: Decks...

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The key to flat roofing and waterproofing is that the system is seamless, fully bonded and impact and abrasion resistant. Polyprufe coatings combine extreme application properties such as rapid cure, even at temperatures well below 0°C, and insensitivity to humidity, They have exceptional physical properties such as impact resistance, flexibility, tear strength, tensile strength, chemical and water resistance. The result is excellent long term weathering and abrasion resistance. The system are 100 percent-solids, so no solvents, no emissions no VOC. Due to its exceptional properties, the Polyurea spray coatings are used extensively internationally for waterproofing, corrosion protection, containment, membranes, linings to tanks and structures, protection of concrete joins and structures.

Application And Preparation:

Correct equipment and a trained Polyurea applicator are critical. Preparation is job site specific and each site presents its own challenges. POLYPRUFE Coatings has a strong working relationship with the manufacturer who review project and specification to insure correct preparation and application.

1) Preparation – The surface to receive the material must be sound, free of oil, grease and contaminants, but also dry. If the surface is not dry, we would have to use our damp tolerant primer. If this was the case, a pull off test to check adhesion is essential. We would ideally look for 0.75 N/mm pull off as a minimum. Preparing to BS standard 8204 (as per synthetic resin floors) is not a bad place to start.

2) Substrate – It is essential that the substrate is strong enough to take the coating/liner. If in doubt, again a pull off test is the best indication, and any sub-standard concrete can be blasted to remove any surface laitance in order to take you back to a sound, strong surface.

3) Other coatings or contaminants - If the surface is already coated with a material, it is essential to make sure that a) it is strong enough to receive a very strong system like the Polyurea, and b) the 2 materials are chemically compatible. Often cross linking polymer based materials are used because of their ability to withstand chemical attack. Once these resins have cured chemically, they are very hard to bond to without the correct preparation, because they will have “closed out” POLYPRUFE surveyors are fully trained experts on waterproofing all of whom have 20 years expierence in waterproofing and coatings.
Colours: Polyurea is an aromatic. Therefore, as with all aromatics, over a period of time colour change as well as superficial oxidation will occur. The minimal oxidation, however, will not affect performance. The manufacturer can supply Aliphatic urethane and other suitable topcoats which POLYPRUFE can be apply where long-term aesthetics are important.

HOW DOES POLYPRUFE POLYUREA COMPARE TO OTHER ROOFING/ DECK SYSTEMS


Polyurea Vs Polyurethane

Polyurea is closely related to polyurethane. Both are two component systems made with Isocyanate-based materials. However, while the second component in polyurethane is polyol resin, the second component in Polyurea is a polyether amine. In terms of performance, conventional polyurethane’s require a catalyst, which is sensitive to temperatures and moisture. Low temperatures can slow the reaction and moisture can interfere with the reaction causing blistering and other negative effects. Polyurea, on the other hand do not require a catalyst. Reactivity for these coatings is fast, typically 3-10 seconds. Consequently they are able to cure at temperatures as low as -20 C and in the presence of moisture.

Polyurea Vs Epoxy

In terms of performance, unlike Polyurea, epoxies require a catalyst. They are sensitive to temperature, humidity and moisture, giving them a narrow window for application. Unlike Polyurea, epoxies have extensive cure time and little or no elongation properties. This leads to frequent failure of the coating with expansion or movement of the substrate.

Polyurea Vs cementitiose

There are a number of cementitiose coatings available. They are mostly trowel or brush applied although some can be sprayed. Some claim a degree of flexibility. None have the flexibility or elastic properties of polyurea. All of them have a long setting and then curing time. Cement based screeds can be made waterproof with additives such as SBR but they are then expensive and have long drying times.

Asphalt and Bitumen Vs Polyurea

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 less from the time it is sprayed.

POLYPRUFE spray is hydrophobic and therefore unaffected by damp substrates when creating non - bonded liners. It can be sprayed at temperatures as low as -30° C with minimal effect on tack free time
Due to the almost instantaneous setting times, it 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 POLYPRUFE SYSTEM CAN BE USED FOR :-

Roof Coating

POLYPRUFE is the ultimate in roofing coatings. Suitable for use over Concrete, Asphalt, Timber and metal roofs.

POLYPRUFE can be formulated to meet specific performance requirements due the wide range of physical properties that can be formulated.

POLYPRUFE is the only roofing system that is seamless, flexible and yet fully bonded, dry in seconds, abrasion and impact resistant and still very competitively priced because it can be installed very very quickly.

Polyurea has excellent crack-bridging properties with high elongation and tensile strength. The fast cure time and insensitivity to moisture allows for a quicker installation with a wider application window. Proper surface preparation and substrate condition is always necessary POLYPRUFE surveyors are experienced experts in waterproofing structures.

POLYPRUFE flooring systems are perfect due to their speed of application, excellent bonding when used with the correct primer.

Other benefits are available with POLYPRUFE flooring systems as well. Polyureas are very durable and abrasion resistant for use in areas of high traffic.

POLYPRUFE ALSO HAVE A RANGE OF RESIN AND SPECILAIST FINISH FLOOR SYSTEMS

Pipe / Pipeline Coatings & Linings

Polyurea Coatings and linings are increasingly being used to protect steel pipes from corrosion. Used extensively by the petro chemical and gas industries to protect pipes from corrosion and abrasion, EVEN IN THE HARSHEST ENVIRONMENTS SUCH AS THE NORTH SEA OIL RIGS.

Polyurea has demonstrated its ability to last longer than paint it is the perfect coating for steels and pipes in damp basements, exposed sites or embedded in concrete and masonry for long term protection from water ,salts and chemicals.

Bridge Coating

Polyurea's ability to fight off corrosion and outlast paint is a major reason these systems are being specified for bridge deck and structure coating. The most common applications of Polyurea coatings on bridges are over steel and concrete.

Joint Fill / Caulk

Polyurea is successfully used as a multi-purpose joint fill, caulking and sealant material. It provides a flexible, durable, weather-tight and traffic resistant seal for all types of building joints, such as expansion joints and control joints in masonry floors, perimeter joints, panels and doors, water reservoirs, etc. It has excellent crack-bridging properties with high elongation and tensile strength. The fast cure time and insensitivity to moisture allows for a quicker installation with a wider application window. Proper surface preparation and substrate condition is always necessary.




 

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