Fireplace question (how to seal)

[MikeT]

We have a brick fireplace that is set up for wood burning that we do not use. I closed the vent many years ago but always got a draft so I took a piece of foam insulation and put caulk around the edge to seal it. That stopped the draft completely. Well, now the wife want's unvented gas logs so I need to take the foam out and will be left with the cast iron flap vent closure that is drafty (new gas logs will burn the foam).

Is there any type of High temp sealer that could stand up to the flames that I can use to seal the cast iron flap up and stop the draft when I'm not burning the logs? I figure someone here will know because you guys have always come up with some great ideas.

Thanks!

 

[High Lord Gomer]

I did a search and before I could find a sealant I found:

Steer away from gas fireplace units that do not vent to the outside because these do not provide a way for dangerous carbon monoxide fumes to exit the home.
Read more: http://www.ehow.com/how_12224751_change-fireplace-gas-insert.html#ixzz2d5f03bQ1

Then I found:
http://www.nextag.com/fireplace-sealant/products-html

 

[MikeT]

Maybe my air leak is a good thing?

 

[High Lord Gomer]

That's what Ivan claims of his air leak.... :o

 

[BSWIFT]

Talk to a pro. The chances for CO poisoning is NOT worth the risk besides the actual fire risk. CO poisoning is oderless and tasteless, just DEAD in a matter of hours. Get a good quality CO detector and ALWAYS replace the battery when it begins to "chirp". CO detectors RARELY false so always, always evacuate the area when it goes into alarm.
Fire places are great (wish I had one myself) but they come with some hefty risk, definitely contact a pro.