Bangladesh off-spinner Nayeem Hasan registered a five-for in the Galle Test and helped Bangladesh to secure a 10-run first innings lead against the hosts on Friday.
At the end of day three, Sri Lanka were at 368 for four. On the fourth day, they added another 117 runs, losing all other wickets, ending their innings at 485.
Pathum Nissanka was the star for the hosts, crafting a magnificent 187 runs, while Kamindu Mendis provided strong support with a valuable 87.
Galle Test: Nissanka's epic ton propels Sri Lanka's solid reply to Bangladesh
For Bangladesh, Hasan Mahmud proved effective, claiming three wickets to go along with Nayeem's contributions. Despite taking the crucial first wicket, Taijul Islam couldn't add any more to his tally.
Earlier, Mushfiqur Rahim and Najmul Hossain hit centuries to guide Bangladesh to 495 in the first innings after winning the toss.