Fast building optimism over Narendra Modi-led government's first full budget on February 28 also bolstered the investor sentiment.
The BSE barometer surpassed the key 29,000-level in early trade with healthcare, capital goods and auto shares in particular attracting investor interest.
The key index though pared some gains concluded the day at its lifetime high of 29,006.02, a gain of 117.16 points or 0.41 per cent from its previous close, taking its gaining streak for the sixth day in succession.
The NSE Nifty also continued its winning run and posted a gain of 31.90 points to hit a fresh record high of 8,774.15.
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Aided by strong foreign fund inflows, the key indices have been setting fresh high level for the past three days.
Sun Pharma soared 3.65 per cent to emerged as the biggest Sensex gainer, followed by Axis Bank at 3.30 pct. Tata Motors (2.70 pc), ONGC (2.01 pc), Cipla (1.73 pc), Tata Steel (1.51 pc), Infosys (1.41 pc), Coal India (1.24 pc), Wipro (1.17 pc) and Dr Reddy's Lab (1.01 pc) were the other big gainers..
Markets are seen consolidating after rallying for 2-3 consecutive sessions on profit-booking at these levels, and partially due to lack of global cues, said Hiren Dhakan, Associate Fund Manager, Bonanza Portfolio.
"Investors across the globe are eyeing the outcome of the European Central Bank (ECB) meet (later in the day) and are expecting announcement of monetary stimulus, which will further improve the liquidity scenario. We shall be seeing its reaction in local markets on Friday," said Jayant Manglik, President, Retail Distribution, Religare Securities.