Former Portugal U20 international Zezinando capitalized on a goalkeeping flap to move Air Force 4 points clear at the top of Division 1.
In all honesty, it had been a dismal spectacle, and it looked like heading for a stalemate until Zezinando fired home after Watchara failed to collect the ball following pressure from Kouassi Hermann.
In the first couple of minutes, Leandro forced Samuel Cunningham into a full stretched save, but that was as good as it got in a turgid first 45 minutes.
The match slightly improved after the interval with Leandro firing a shot inches wide in the 57th minute while Cunningham had to make a decisive block at the feet of Christen with 16 minutes left.
In the 79th minute, Air Force just needed one chance, and they took it when Zezinando drilled home a low drive from the edge of the box.
Singh Tarua had what appeared to be a good penalty shout minutes later, but the referee produced a yellow card to Sarawut instead of pointing to the spot.
The victory moved Air Force four points clear of PTT Rayong, but more importantly, twelve points clear of fourth placed Singh Tarua. Air Force and PTT Rayong should be able to kick on and reserve a TPL spot for 2014 with any one of Bangkok FC, Singh Tarua, Phuket and Nakhon Ratchasima joining them in the top flight.