This topic has been covered many times but I'm having a hard time finding a definitive answer. The question comes up on using high temp silicone sealants to seal the stove pipe joints. The typical answer is....just use stove/gasket cement. Well I tried that....and failed.
But I may not have done it correctly. My stove pipe was already together and was installed without cement or sealant. I applied the furnace cement over the seams. It worked for the winter but now everything is just flaking off and falling to the floor.
So my questions are as follows:
1. Is it useless to try and apply a sealant over the seams? Or is the only way to do this successfully is to take the stove pipe apart and apply it to the female end of the pipe, then reassemble?
2. Silicone sealants over the outside. Yikes! This has been covered and the answer is maybe. Companies like Rutland, Boss, 3M, etc make siliconized sealants that remain pliable with a service temperature up to 800 degrees F. Rutland in particular makes one in black (the others are red) that is just fine up to 550F.
Now on single wall its a definite NO. But what about double wall? If my double wall was over 550F my chimney went nuclear probably would have to be replaced anyway. What do you think?
Take the stove pipe apart, fill with stove/gasket cement, then reassemble? Or go with the high temp silicone over the seams (much easier)?
But I may not have done it correctly. My stove pipe was already together and was installed without cement or sealant. I applied the furnace cement over the seams. It worked for the winter but now everything is just flaking off and falling to the floor.
So my questions are as follows:
1. Is it useless to try and apply a sealant over the seams? Or is the only way to do this successfully is to take the stove pipe apart and apply it to the female end of the pipe, then reassemble?
2. Silicone sealants over the outside. Yikes! This has been covered and the answer is maybe. Companies like Rutland, Boss, 3M, etc make siliconized sealants that remain pliable with a service temperature up to 800 degrees F. Rutland in particular makes one in black (the others are red) that is just fine up to 550F.
Now on single wall its a definite NO. But what about double wall? If my double wall was over 550F my chimney went nuclear probably would have to be replaced anyway. What do you think?
Take the stove pipe apart, fill with stove/gasket cement, then reassemble? Or go with the high temp silicone over the seams (much easier)?