put in oven, usuing a flat head screw driver go all the way around and try to pry it open, keep on checking it so you don't melt the headlight. once you done, put the two piece together, put it back in the oven until the sealent get soft, press the two piece together with your hand; until they're somewhat seal then use a plier, go around the headlight and gently squeeze the two piece together. done this 3 times already,