Dagenham increased the pressure on Conference leaders Oxford as Burton capitulated at Victoria Road.
Craig Mackail-Smith put Albion in front with a 34th-minute effort before a host of missed chances from either side.
Then with six minutes left, Paul Benson's neat header made doubled the lead before David Rainford scored with an injury-time penalty.
That made up for Glen Southam's miss moments earlier when his penalty was well saved by goalkeeper Kevin Poole.
Dag & Red: Roberts, Griffiths, Blackett, Uddin, Foster, Sloma (Bruce 90), Southam, Rainford, Saunders (Akurang 83), Mackail-Smith, Benson.
Subs Not Used: Hogan, Batt, Lettejallow.
Goals: Mackail-Smith 34, Benson 85, Rainford 90 pen.
Burton Albion: Poole, Webster, Tinson, Stride (Shaw 75), Rowett, Gilroy, Fowler, Carden, Corbett, Clare, Brown (Harrad 79).
Subs Not Used: Taylor, Holmes.
Ref: D Phillips (Chichester).