Lightcems Whitecoat is a white ingrained fiber reinforced dry mortar. The mortar has water repellent and a diffusion open materi-al. The product contains Portland cement, sand up to 0,5mm, PP-fibers and plasticizing and sealing additives. Whitecoat does not contain brominated flame retardant materi-als. Whitecoat is a white-engrained product.
To accommodate the new EU-regulations concerning the brightness level in tunnels, there are to different approaches. One can ether replace the existing lights with stronger and more effective ones, or make the tunnel linings brighter. Whitecoat has been developed specially for this purpose.
The physical environment inside a tunnel is both filthy and damp. Paint and calcium containing materials have a tendency to disintegrate or become dull in such an atmosphere. Water is constantly penetrating the tunnel walls through fissures and cracks in the mountain, which is why Whitecoat is diffusion open from the inside allowing water to pass through. It is however water resistant from the outside, thereby blocking any unwanted precipitation reactions, where carbonation would result in the degradation of the concrete material.
The products bonding characteristics has been a primary focus in the development stage, a newly mixed plaster will bond to all porous surfaces like concrete and mountain sides. It will however not bond to polished surfaces like epoxy. When the wet plaster is placed on a surface, it will intrude into the pores, expanding under the hardening process, creating a very strong bond. A wash using high pressured water with a maximum of 300 bars, will give the product back its original appearance and structure.
As with all applications it is essential to apply to a clean, sound surface free from grease, oil, dust and loose material. Due to Whit-coat’s cement base, alkali sensitive primers and paint should be removed prior to appli-cation of Whitecoat, if the paint cannot be removed, a sealing coat should be applied (See Lightcem for advice). All loose rust or paint should be removed prior to Whitecoat application. Concrete substrates must be adequately prepared, all surfaces containing grease or oil should be cleaned with deter-gent and care taken to ensure the oil/grease is removed and not spread around. Warm surfaces should be carefully damped to pre-vent a too rapid hardening. If one is unsure of the type of surface, a test of the product is advised.
METHOD OF APPLICATION:
Whitecoat must be mixed with potable water by mechanical means, such as forced action mixers (Cretangle), or slow speed drill paddle mixers for about 5 – 10 minutes. Approximate-ly 5 – 8 liters of water is added per 25 kg of Whitecoat, depending on the preferred con-sistency. Add the majority of the water to the mixer prior to adding the Whitecoat, add the re-maining water during mixing. Never mix more material than you can use during a 30 minute period. Whitecoat is sprayed using suitable equipment. Pumps such as a putsmeister P11 Vario Varm Pump, or a Lancy Pump PH9 are adequate for this type of spay application Spraying / application should take place directly after mixing.
Should take place at temperatures over +5 °C, and never under +2 °C the first 48 hours after application.
Whitecoat is a specially developed, surface protective concrete which is used in places where one needs a strong and easily washa-ble surface. Whitecoat effectively prevents intrusion of grease, oil and dust. The product can withstand frost and defrost fluctuations. One of the primary uses of Whitecoat is in tunnel linings, brightening the tunnel and giving a safe optical effect for the road users.
The information given within this product description is based NOT ONLY on work carried out in our own laboratories, but also on practical experience obtained during field work. It is offered without guarantee and no patent is assumed.
All equipment and tools should be cleaned once work is completed or during extended breaks.
For health, safety and environmental information, View/download the HSE-document from the downloads tab above.