How to Seal a Pellet Stove Pipe

Verify the pipe is straight before making any adjustments. Climb a ladder and check the pipe for level at several locations. Check the side and front of the pipe to ensure it is level in both directions by placing the level flat against the surface of the pipe and verifying the appropriate bubbles are between the marks on the level.

Start at the top pipe section and work down. Mix up the wood stove cement in the container to ensure that it will disperse easily. Use the flat tip of the putty knife to scoop up a portion of the wood stove cement and run it into the gap between the pipe joints, in the same manner as applying frosting to a cake. Make sure it gets in between the two pipe sections. Clean off any excess cement with a wet rag.

Add three screws placed equally apart around the circumference of the pipe sections where they join, using a drill and a screw bit. The screws should bite into the metal easily with the drill pressure. Verify that the screws have gone through both sections of pipe by placing them near the bottom edge of the overlapping pipe section.

Repeat this down the length of the pipe -- first the wood stove cement, then the screws at each pipe section.

Take the ladder outside and place it so that you can climb onto the roof. Here you will use the high-temperature caulk to seal around the chimney and any places where you spot gaps. Complete this on a yearly basis, because the caulk wears with the hot and cold conditions of the pipe and the weather. Avoid using high-temperature caulk on the stove pipe itself, as it might run if it gets too hot.

Use the wood-stove paint to touch up any dings in the pipe and cover up the bright metal look of the sheet metal screws. A quick spray over each screw head should be enough.