Shelbourne are six points clear at the top of the SSE Airtricity Men's Premier Division.
Two Will Jarvis penalties helped the Reds to a 2-0 win over 10 man Shamrock Rovers at Tallaght Stadium.
Elsewhere, Derry City lost ground on the league leaders following a 2-2 draw at home to Sligo Rovers.
New manager Jon Daly watched on as Dundalk fell to a 2-0 defeat at Galway United.
A late Danny Grant equaliser earned Bohemians a 2-2 draw at home to Stephen Kenny's St. Pat's.
