METHOD STATEMENT

Epoxy Coating

Surface preparation

The long term durability of any resin floor system is determined by the adhesive bond achieved between the flooring material and the substrate. It is most important therefore that substrates are correctly prepared prior to application.

(Note: See Noor AL Khaldiah's Concrete floor preparation section in pre-qualification)

 

Priming

Priming is not normally required if the provided substrate is sound, untreated and good quality nonporous concrete. If any doubts exist of the quality of the concrete, or if it is porous it should be primed. The two components (Base and Hardener) should be mixed in the proportions supplied; preferably using a slow speed drill and paddle, the primer should be applied in a thin continuous film, using rollers or stiff brushes. Work the primer well into the surface of the concrete taking care to avoid pending or over application. The primer should be left to achieve a tack-free condition before applying the top coat. A second coat of primer may be required if the substrate is excessively porous.

 

Mixing the coating

The base and hardener components of the top coat material should be thoroughly stirred before the two are mixed together. The entire contents of the hardener container should be poured into the base container and the two materials mixed thoroughly, and then add the colour pot and mix for at least 3 minutes. The use of a heavy-duty slow speed, flameproof or air driven drill fitted with a Mixing Paddle is desirable. Mix these components in the quantities supplied taking care to ensure all containers are scraped clean. Do not add solvent thinners at any time.

 

Standard application

The first coat of the resinous material should be applied using a good quality medium haired pile roller, suitable for epoxy application, or squeegee to achieve a continuous coating. Ensure that loose hairs on the roller are removed before use. A minimum film thickness of 200 microns should be applied. This can be increased where specifications demand. When the base coat has reached initial cure (12hours @ 20°C or 5 hours at 35°C). The top coat can be applied by medium haired roller, at minimum film thickness of 200 microns. Care should be taken to ensure that a continuous film is achieved.

 

Antislip application

If a slip resistant texture is required, the base coat shall be applied as per the standard application, but at a minimum film thickness of 250 microns. The base coat should then be dressed with the chosen Antislip Grain. This should be done as soon as possible after laying. The recommended procedure is to completely blind the base coat i.e. apply excess dressing aggregate to completely obliterate the base coating. When the base coat has reached initial cure (12 hours @ 20°C or 5 hours at 35°C), the excess aggregate should be vacuum cleaner from the surface. The top coat can now be applied by medium haired roller.

Care should be taken to ensure that a continuous film is achieved and the rough surface, caused by the aggregate, is completely sealed. This top coat must be applied within 36 hours @ 20°C (15 hours @ 35°C) of the application of the first coat.

 

Expansion joints

Expansion joints in the existing substrate must be retained and continued through the topping. And use a joint sealants material specifically designed for flooring.

Polyurethane Coating

Surface preparation

  1. Concrete surfaces must be sound, dry, clean, compact, and free from dust, curing compounds, and grease or any material which may impair adhesion. If the concrete surface is defective or has laitance, it must be cut back to a sound base

  2. The substrate should further be roughened to remove excess laitance, to expose pinholes and blowholes and to provide a mechanical key for subsequent application of repairing material. This is most effectively achieved be the use of proprietary blast media or wire brushing.

  3. The surface must be substantially dry. read more...

 

Product Mixing

  1. Stir the hardener and base separately

  2. Empty the hardener content into the base container and mix the two components thoroughly till a uniform homogeneous pate is obtained.

  3. It is strongly recommended to use an electrical slow speed drill (200 to 300 rpm) fitted with a suitable paddle for mixing the product.

  4. Do not add solvent or any other products to the mix.

 

Priming

  1. A porous substrate should be primed with primerPoxy FF.

  2. Mix the base (Part A) and hardener (Part B) for five minutes till obtaining a homogenous mixture.

  3. The primer should be applied within the pot life time. And this time, unused material will have stiffened and should be discarded

  4. Apply the primer at a rate of 0.15 to 0.2 Lt/m2 by using stiff brush or roller.

 

Floor joints

  1. Joint sealant a joint geometry should be compatible with the floor type used. Intended exposure conditions and likely movement characteristics of the substrate.

 

Top coat

  1. Mix the two components by adding component B (hardener) to component A (Base) and mix for 5 minutes use a slow speed drill machine with proper attachment till obtaining homogeneous mix.

  2. Apply the first coat of missed product at a rate of 0.35 to 0.55 Lt/m2. Use a proper roller to spread the material evenly over the surface.

  3. While the first coat is still wet, broadcast anti-slip quartz should be spread evenly and at the same rate

  4.  

    Limitations

  5. Proper surface preparation will secure a durable and high performance floor coating.

  6. Alternative methods of floor preparation (such as grinding, high pressure water jet, chemical etching) may be considered provided that the resulted surface should be clean, sound and totally dry prior to the application of floor coating.

  7. Application should be executed by an approved applicator.

  8. For flooring exposed to sunlight, apply top coat using an UV resistant material.

  9. During summer season, working area should be covered if work to be executed during the peak temperature of the day in order to prevent the direct sun effect. High surface temperature (more than 35 C) will cause a quick evaporation from the mix which will seriously weaken the strength, and therefore adhesion.

  10. Do not apply if temperature is less than 5 C

  11. Do not apply in rainy weather, high winds and sand storms.

  12. Store unmixed material in a cool environment, avoiding exposure to direct sunlight.

  13. Do not mix large quantities of product more than what can be applied during the open time

  14. Partial mixing of the product components should not be allowed under any conditions.

  15. Substrate surface should be totally dry during application. In case of a possibility of damp rising risk, apply a vapour barrier material.

  16. Wear protected goggles and gloves during application. Working area should be ventilated in order to ensure proper curing and to reduce the risk of inhaling chemical vapours by the applicator.

  17. Next day, ensure that the quartz are embedded firmly in the epoxy coat. Scrape the surface lightly to remove excess quartz. Sweep the surface in both direction and then vacuum to ensure that loose particles are removed.

  18. Apply the second coat (top coat) at right angle of the first coat at the same rate.

  19. For heavy traffic areas such as drive lanes, ramps, turn areas, or other areas subjected to high traffic abrasion, apply a third coat.

  20. Subsequent coats should be applied between the products minimum and maximum over coating times of 4-16 hours @ 30 C.

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Email:      info@nourk.com
Phone:    +971 6 573 3610

Fax:        +971 6 573 3642

Address:  Suite# 1204, Al Batha Tower, Buheira Corniche, Sharjah - United Arab Emirates, P.O.Box 68650

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