Window tinting, particularly the darker tints, actually increase the heat load. The window becomes a radiator as the dark tint absorbs the sun's heat and causes the pane to get very hot and hence radiate this heat into your house. I have scanned windows that have been tinted and have direct sunlight hitting them with an IR thermometer and found surface temperatures in excess of 140* F. Reflective tints are not that bad, but still get hot and radiate heat into the structure.

However I have done the tinting from Sunglowf.com, It is located on Denver. But you can call them to know wheter they have any branch on Malaysia, The numbers are
(303) 279-5884 and (970) 335-9600

Thanks