Into the second-half and chances were not quite so forthcoming, the Strikers nearly went ahead when a free-kick into the box presented an opportunity for Adam Cranfield, but he volley narrowly over the crossbar when well placed.
At the other end a Mitchell-Phillips header was expertly saved by Robinson but into the path of Pullen who somehow manged to loft the rebound over the crossbar from a yard out.
Charlie Goss also looked dangerous on a few occasions and Robinson had to be alert to deny him putting the Seagulls ahead.
The first-half of extra-time started almost as frantically as the beginning of the match, Luke Ellard bent a shot from the edge of the area towards the far post for ASC Strikers, but Simpson dived across his goal to make a fingertip save to deflect it around the post.
From the resulting corner Cranfield did everything right for the Strikers as he rose highest to meet the ball and head downwards, only for Simpson to fly across his goal and make the save.
Almost immediately Seagulls broke away and Ward cut inside and sent a curling effort that look destined for the the top corner but for the intervention of Robinson who flung himself across to claw the ball to safety.
Neither side wanted to lose the game in the second-period of added time, but yet both had golden opportunities to nick it, first Demas Ramsis with two minutes left thought he had scored for Strikers as he connected with Tegan Freeman’s dinked ball in sending it goal-wards but Simpson managed to scramble back and save practically on his goal-line.
Then in added time at the end of extra-time a long ball over the top released Mitchell-Phillips one-on-one with Robinson, but with the goal seemingly at his mercy the Seagulls forward could only direct his effort agonisingly wide of the target.
So on to penalties Conrad Honore, Mitchell-Phillips and Isaac Abatan all converted for Seagulls with no reply from ASC Strikers as Callum Ward saw his spot kick well saved by Simpson and Little missed the target. Ramsis and Ellard scored from the spot for Strikers either side of a fine save by Robinson to deny Seagulls’ Ward, leaving the score at three goal to two to the Seagulls with a penalty kick each remaining of the regulation ten.
The lively Pullen stepped up for Seagulls and saw his effort cannon back off the post, but his blushes were spared as Wright blew the opportunity to draw the sides level as his spot kick down the middle was read by Simpson and won the cup for the Seagulls!
After the match victorious Seagulls’ manager Keith Vipan said: “We got there in the end, we certainly made it a little bit tough for ourselves, but what a game, I’ve got to thank AFC they were amazing competitors and an enthralling game which I am sure for the neutral was great to watch.
“It was nerve-wracking for us, but the boys pulled it off in the end which is fantastic, it is great for the boys that we finally got over the line and won a cup!”