Rutland Seal it Right 800-Degree Latex, 10.3-Ounce Cartridge, Black

Seal It Right is an easy to use sealant for installation and maintenance of direct vent appliances, such as gas burning systems and pellet stoves. Becomes tough and flexible with air curing and further hardens with heat. Resists vibrations, cracking, fumes, gasses, moisture and acids formed by gas combustion by-products. Due to its high solids content, it will not shrink or turn to brittle powder.