Oil Furnace Inspection Door Seal


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Old 04-24-12, 07:11 PM
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Oil Furnace Inspection Door Seal

Been awhile since I've been on this forum. We have an old oil fired hot water furnace that works fine but the gasket around the inspection door is flaking off in places and needs to be replaced. The door is about 16" square, what can I use to replace the seal? Can I use some high temp fiberglass rope or even the ceramic rope and how could I attach it? The door comes off each year for a clean out. Thanks.
 
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Old 04-27-12, 05:26 PM
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The high temp rope which you mentioned would be the material of choice. You can hold it in place with high temp silicone available at any auto parts store. The best thing for holding the gasket in place would be water glass (a sodium silicate solution).
 
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Old 04-28-12, 02:42 PM
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Thanks Grady, I was hoping so, so I already ordered it.
 
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Old 04-28-12, 06:48 PM
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Make sure the surface to which you are attaching the gasket is clean. Use a wire brush to clean the groove. A brush used for cleaning copper fittings before soldering works well.
 
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Old 04-28-12, 07:01 PM
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Will do, I got some braided silica rope and high-temperature silicate adhesive form McMaster-Carr coming. Thanks again.
 
 

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