A trim breaker for sealing an outer wrapper of an appliance with an inner liner to form an insulation space therebetween is provided. The trim breaker includes a body including a rear wall, a first leg extending from the rear wall, and a second leg extending from the rear wall. The trim breaker also includes a front wall coupled with the body opposite the rear wall, wherein the front wall includes a channel extending inward toward the rear wall, and a chamber defined at least in part between the front wall and the rear wall.