Before this match commenced, Bangkok Glass knew they needed to find two goals from somewhere to have any chance of overturning their first leg 3-2 defeat.
The away side forced an early chance when a long throw released Ajayi and Sarun was inches away from connecting with Ajayi's cross come shot across the goal.
The push from Bangkok Glass never really materialized with the hosts having chances as Jakkraphan fired over from inside the box and Goran Jerkovic crashed a header onto the bar as it remained goalless at the interval.
The Glass Rabbit's misery was complete five minutes from time when Valery Hiek was sent for an early shower after a high boot to Ekwalla's head earned him his second yellow card. There were little complaints as the big man from Cameroon slowly trudged off the park.