Daniel Vettori (three for 15) sent down a miserly spell of bowling earlier to help reduce Punjab to 104 for seven - with Karan Goel (38) and England's Ravi Bopara (22) the main contributors - in their innings, which was initially reduced to 12 overs.
In response, Gautam Gambhir and Sehwag made a flying start reaching 24 in just 1.5 overs, before the game was reduced even further with a total of 54 needed from six overs.
And needing 30 from 25 balls after the resumption, the pair showed no mercy and helped their side overhaul Punjab's revised total with more than an over to spare, Sehwag the destroyer with his innings including three sixes and four fours