Seal Tight Damper

This is a great option for the homeowner who doesnt want a visible cap on their chimney!  The Seal Tight Damper attaches to the top of the flue tile line.  It provides a tight gasketed fit to seal out weather, insects, birds & other animals while keeping heat in! (This damper can also be installed beneath a HY-C chimney cap!)  Each damper kits includes a lifetime warranty, 50ft. cut to fit cable, fireplace bracket, cool-touch spring handle, mounting adhesive & hardware. Do not use on chimneys serving vented gas logs.
M-FLEX Aluminum Liner KitM-FLEX Aluminum Liner Kit

Seal Tight Damper Sizing

Size Fits Flue Sizes
8" X 8" 6 3/4" X 6 3/4" to 9" X 9"
8" X 17" 6 1/4"" X 14 1/2" to 8 3/4" X 16 3/4"
9" X 13" 6 1/2" X 10 1/2" to 9" X 12 3/4"
12" X 16" 9 1/4" X 13" to 11 3/4" X 15 1/2"
13" X 13" 10 1/8" X 10 1/8" to 12 3/4" X 12 3/4"
13" X 18" 9 5/8" X 15" to 12 3/4" X 17 1/2"
18" X 18" 15" X 15" to 17 3/4" X 17 3/4"