Friday, March 30, 2007

Ingin Mengecat Rumah?.. Tahukah Anda Bagaimana Mengecat Dengan Betul?

Hi,

Kebanyakan rumah di Shah Alam 2 ini talah pun sedia di cat ketika di beli.Walaubagaimana pun ramai juga yang mengecat semula rumah mereka samada di bahagian dalam atau di bahagian luar, kerana mungkin mereka mempunya citarasa yang berlainan..

Semua orang tahu bagaimana mengecat, tapi takukah kita bagaimana mengecat dengan betul?.. Tahukah kita apa itu cat?.. Kenapa seringkali hasil yang kita dapati tidak seperti yang kita kehendaki setelah berhabis duit membeli cat?.. Cat yang bagaimana yang lebih bagus?.Apakah jenis jenis cat?...Yang murah atau yang mahal?..


Semua pertanyaan tersebut saya akan cuba huraikan satu persatu secara ringkas dan mudah di fahami..Sebelum itu sila lihat dahulu Technical Data sejenis cat yang di gunakan untuk primer atau undercoat.. mungkin ini akan mengubah persepsi anda terhadap CAT..


Product description
Jotasealer 07 is an acrylic water based alkali resistant sealer.




Recommended use
As a sealer or a primer on interior or exterior concrete, masonry, plaster surfaces and brick work.




Film thickness and spreading rate
Minimum Maximum Typical
Film thickness, dry (µm) 30 40 35
Film thickness, wet (µm) 79 132 92
Theoretical spreading rate (m²/l) 127 9.5 10





Physical properties
Colour White
Solids (vol %)* 38 ± 1
Flash point Nonflammable
Water resistance Very good
*Measured according to ISO 3233:1998 (E)





Surface preparation

The substrate must be sound, clean, dry, free from dust, oil, grease and laitance etc. All traces of release agents must be removed. On chalky and dusty surfaces, all loose material must be removed by stiff bristle brushing.

Other surfaces
The coating may be used on other substrates. Please contact your local Jotun office for more information.




Condition during application
Apply at a temperature between 10°C and 35°C.The temperature of the substrate should be minimum 3°C above the dew point of the air. The temperature and the relative humidity should be measured in the vicinity of the substrate.




Application methods
Spray Use airless spray or conventional spray
Brush Recommended
Roller Recommended





Application data
Mixing ratio (volume) The paint is ready to use after proper stirring. If thinning is required, water may be added up to a maximum of 5%.
Thinner/Cleaner Water


Guiding data airless spray
Pressure at nozzle 140 - 190 kg/cm² (2100 psi)
Nozzle tip 0.021" - 0.027"
Spray angle 65° - 80°
Filter Check to ensure that filters are clean.






Drying time
Drying times are generally related to air circulation, temperature, film thickness and number of coats, and will be affected correspondingly. The figures given in the table are typical with:
* Good ventilation (Outdoor exposure or free circulation of air)
* Typical film thickness
* One coat on top of inert substrate
* Relative humidity 70%



Substrate temperature 10°C 23°C 40°C
Surface dry 2 h 1 h 0.5 h
Through dry 8 h 6 h 4 h
Dry to recoat, minimum 1 4 h 2 h 1 h
Dry to recoat, maximum 2,3




1. Recommended data given for recoating with the same generic type of paint.
2. In case of multi-coat application, drying times will be influenced by the number and sequence and by the total thickness of previous coats applied – reference is made to the corresponding system data sheet.
3. The surface should be dry and free from any contamination prior to application of the subsequent coat.


The given data must be considered as guidelines only. The actual drying time/times before recoating may be shorter or longer, depending on film thickness, ventilation, humidity, underlying paint system, requirement for early handling and mechanical strength etc. A complete system can be described on a system sheet, where all parameters and special conditions could be included.




Typical paint system

Exterior
Jotasealer 07 1 coat
Jotashield 2 coats


Interior
Jotasealer 07 1 coat
Majestic or Strax 2 coats

Other systems may be specified, depending on area of use




Storage
The product must be stored in accordance with national regulations. Storage conditions are to keep the containers in a dry, cool, well ventilated space and away from source of heat and ignition. Containers must be kept tightly closed.




Handling
Handle with care. Stir well before use.




Packing size

Packing may vary from country to country according to local requirements.




Health and safety
Please observe the precautionary notices displayed on the container. Use under well ventilated conditions. Do not breathe or inhale mist. Avoid skin contact. Spillage on the skin should immediately be removed with suitable cleanser, soap and water. Eyes should be well flushed with water and medical attention sought immediately.

For detailed information on the health and safety hazards and precautions for use of this product, we refer to the Material Safety Data Sheet.




DISCLAIMER
The information in this data sheet is given to the best of our knowledge based on laboratory testing and practical experience. However, as the product is often used under conditions beyond our control, we cannot guarantee anything but the quality of the product itself. We reserve the right to change the given data without notice.


bersambung ...

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