To Repair a
leaking door seal you will need:
metal putty knife or similar metal scraper (approx 1” wide)
Soapy water or alcohol
Cleaning rags or towels
2 tubes 100
percent rubber silicone General Purpose RTV Silicone
(does not need to be high temp and any color may be used) up to
two large tubes may be required. We use TremPro 644 General
Purpose RTV Silicone Sealant from Fastenal. It is available
caulking gun (to apply the silicone)
Wax paper or Saran wrap
1. First remove remaining door seal with a putty
knife or similar metal scraper. It is not necessary to remove
all of the original silicone seal but; all loose material should
2. Next clean door seal trough with alcohol or
soapy water to remove any soot or tar buildup and wipe dry. This
will insure good cohesion with the new silicone you will be
3. Next fill the area between the outer metal
lip and the square inner bar with a thick bead of silicone
(silicone should be at least 3/8” thick/deep). This usually
takes about 1/2 a large tube of silicone per side. Do not
apply sparingly as any excess silicone is easily trimmed
off with a knife once it is fully cured.
4. Cut or tear wax paper (or Saran Wrap) into
strips about 3” wide. Cover the fresh silicone seal with these
strips to prevent it from sticking to the door flange when
making the seal impression.
5. Close door (not completely), just
enough insure contact has been made between door seal and flange
of furnace. Contact should leave an impression in fresh
silicone indicating all surface areas of door seal and furnace
flange are touching. Some extra silicone may squeeze out
from around and under the wax paper during this step and is to
be expected if adequate amounts are used. This excess may be
6. Open door and allow new silicone seal to cure
for a full 24 hours before putting furnace into operation. The
wax paper may be removed prior to use but is not necessary.
Excess silicone that may have squeezed out while making the
impression may be removed or cut away at this time.
This new door seal should get your furnace back
into serviceable condition and can be expected to last for
several years. These steps may be followed to repair either door
seal at any time but are especially easy to do prior putting the
furnace into operation for a heating season.
SHAVER OUTDOOR WOOD FURNACE
Superior Wood Furnace!