Mayank I've used all kinds of plastics including the cheap stuff. I finally purchased the correct plastic for the skin of a greenhouse. This is warrantied for 4 years. The cheap stuff disintegrates within a year. It will fall apart in chunks or if you've got snow, your green house will implode.
The 'good' stuff has at least a 4 year warranty against UV damage. This is the minimum you want to purchase and use. The plastic you are considering isn't made for green house skins or any exterior application where the plastic is harmed by sun. The good skins are a bit opaque, not clear.
Installation of this plastic is another issue for longevity of the 'skin'. 4 years is very nice but still a short time. Installation is critical. You have to use 'padding' beneath the plastic above the structural members and then you fasten that plastic using proper screws with 'skirts', round gasket like things so the plastic doesn't tear. Make sure you know which side of the plastic you purchase that is meant for a greenhouse is supposed to be UP facing the exterior of the greenhouse.
Don't use the cheap stuff or you shall have to learn what we all had to learn the hard way. Just saying! Skinning a green house is a LOT of work. What kind of greenhouse do you have or are making? What zone do you live? Are you using the garden soil in place or are you doing pots? Will you have artificial lighting? Make sure you have big fans in place to run 24/7 during the season.