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What options we have in India for Sealing leaks around windows and doors .
Are there any products of weatherstripping available in India .

Have seen at few places some products used for glassdoors but not sure can be used for doors?
Am looking something to plug the gaps, where cold air will not enter.

Am not sure where if any products such are available in Bangalore.

3M has few products like
http://www.shop3m.com/3m-energy-saving-products.html

I was looking for this as well. NEver found a decent solution, so my contractor designed one himself - it works, but I want a better solution, which I am still looking for, if it is not available locally, I don't mind getting it from outside as well.