QUOTE(leonary @ Oct 2 2013, 08:29 AM)
currently, i am planning for car tint and come across the term VLT%
so, in order to meet JPJ requirement, we must have VLT% more than 50% for side and more than 70% for windscreen?
need some expert to help for this
Yes, that is correct in theory, but in real-life practice, it is not as simple as that. Since all windscreens do not come in VLT100%, some VLT90%, some VLT80% etc., even if the tint itself is VLT70%, after installation the windscreen may register a VLT of 60% or lower. Similarly, for a tint that is VLT50%, after installation the windscreen may end up with VLT35%.
In summary, most tints that comply to JPJ requirements, after these tints are installed to your vehicle's windscreen, if it goes through Puspakom inspection, chances are likely that it will fail the test. The normal practice is to choose a tint that does not look to dark (in real life) so as the police or JPJ guys will not stop you when you ard driving on the roads. The risk will be lower with tints that have lighter shades, higher with tints that have darker shades.
More important is to check with tint installer whether they provide JPJ warranty in the event you get stopped by the police or JPJ. Some tint dealers/installers provide up to 5-years JPJ warranty(Smart Window/Huper Optik provides this). In the event you get into trouble with the police or JPJ within 5 years, they will settle for you. Only for select tints above VLT42%. Those below 40% that are deemed as too dark for side windscreens, JPJ warranty coverage is not provided.
You want to play safe just choose within VLT50% for sides and 70% for fronts even though they will still fail the test at Puspakom. With lower VLT figures, usually you will gain better heat rejection with higher TSER figures, generally. That is why most people choose darker tints (higher TSER) to have better heat rejection.