Wealdstone's Ryman Premier play-off hopes were dented after a 0-0 draw at rivals Harrow Borough.
The Stones are four points behind the top five, with a game in hand, and may need to win their remaining games to reach their target.
Wayne Walters nearly gave the Reds the lead but his shot was blocked on the line by Kurtney Brooks.
Richard Jolly went close for the visitors but his shot was well saved by Jamie Jackson.
The best chance late in the contest fell to Boro when Jon Jo Bates was denied by a brilliant last ditch tackle from Tommie Hoban.