Place the gasket over the 14x14 roof opening with the βThis Side Upβ sticker facing up.
Apply self-leveling silicone evenly around the edges to prevent leaks.

The roof gasket sits directly between the roof and the AC base. Use self-leveling silicone around its edge to seal water out. Smooth it with your finger to remove bubbles and ensure a tight bond before lowering the AC unit.

