High temp sealants questions

[ozarkjeep]

what do I use around the cap flange ( top of chimney) to seal against water intrusion?

and also, do I need anything around where the starter piece or collar drops into the stove it self?

full stainless liner, inside a full masonry chimney ( with clay liner blocks)
earth stove bv4000c ( cat stove)

just want it sealed tight, since its a bear to get in and out.

thanks!

 

[elkimmeg]

Other hints RTV caulk is used up top around the vent and plate heat is not a big issue there. RTV caulk can be used to seal around the damper plate but not between the liner and damper plate cut out hole .Too much heat there and the caulk could catch fire. Use Draft sealant 136 caulk gasket cement, furnace cement, For that final sealing. Remember the damper plate can be assembled using multi pieces caulked and screwed.

cut and pasted from a reply to hogwild post earlies today

 

[wg_bent]

As usual...Elk is on target here. One peice of clarification for you just in case...all silicone calk is nearly same temp tolerance. I found that out by reading info on the masonry heater pages. They had used some clear silicone calk to put some cut flue tiles back together that formed the bottom of the heater channels. They knew how hot the gasses were at certain points by where the silicone had vaporized.

 

[DriftWood]

ORBITER THERMAL PROTECTION SYSTEM

"To prevent damage to the tiles, Strain Isolation Pads - a layer of nylon felt Nomex (flame-retardant material)- are used between the tiles and the orbiter's surface. The pads are bonded to the tiles, as well as to the skin of the Shuttle, with RTV, a room-temperature vulcanizing silicone adhesive."

"All of the major ingredients in the Shuttle's external Thermal Protection System-tiles, Flexible Insulation Blankets and Felt Reusable Surface Insulation-are bonded to the orbiter with the RTV adhesive. The cement will withstand temperatures as high as 550 degrees F, and as low as minus 250 degrees F without losing its bond strength."

(broken link removed)