Not sure of the Pakistan conditions, but this wax has been universally used including the brutal winters in the canada and usa and with all the snow/road salt/brine , it has lasted them those brutal seasons and still was protecting when they went on detail for next season. Our summers are brutal but this wax had a very high melting point. Other than that we have dust in our region more than US/UK but I doubt that would be any factor in decreasing its durability. Although the wax is detergent safe, still using a car shampoo would be the right way for it to last longer.
While several reviews mention 10-12 months, if it gives you 4-6 months you are still at benefit. Prep is the key (as with all waxes and sealants). So that's the most important thing. To ensure complete, go with two coats a few hours apart and you should be set for the season (or more). This wax isn't forgiving with its application so you have apply very thin and remove every few panels.
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