A second half double from Vito Plut gave Sliema three valuable points and consigned Mosta to their first defeat of the season.
The Slovenian striker powered in a close-range shot which was soon followed up by a stunning header to silence the Mosta supporters.
Despite pressing David Akpan into action in the first minute with a stinging 20-metre drive from Neil Frendo which crashed against the crossbar, Sliema failed to capitalise on their dominance in the first half.
Mosta soon crafted a chance of their own after the lively Zachary Brincat escaped down the left but his low drive ended just wide.
Read the full story on the Times of Malta Sports website...