cebaero
Junior Member
Joined: August 2024
Posts: 52
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Post by cebaero on Aug 21, 2024 9:56:49 GMT -5
I would avoid the furnace cement and just stick to anti-seize. I've tried a number of commercial ceramic sealants for experimenting on plug and sensor sealing duty. Even with the best prep, they don't handle vibration well and flake off, crack, or will generally fail at the worst possible time (especially around anything that produces net positive pressure). I've made a few ceramic-buffed phenolic resin putties that work quite well, but they are definitely not meant for being able to remove the fittings, to the point that they bond so strongly that you would have to destroy any substrate to get them off. I can, unfortunately, send you pictures of that exact case stated above with a broken ignitor plug that gave up trying to remove it before the resin broke. Fortunately, just found this stuff. Thread sealant designed for 1800 fahrenheit and is used in the gas turbine industry. Just vetted the spec sheet out and looks legit. I am going to return the furnace cement and anti seize and give this stuff a try. Will update in a week or so when it comes in and I test it. |
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Post by ericthegreatish on Aug 22, 2024 4:47:49 GMT -5
Thread sealant should be fine. I have mine threaded right onto the flame tube with it and it hasn't leaked even during an over temp run. Worst case, it leaks a tiny bit and you find an alternative... Good luck, Eric Thank you for the reply. Do you know what kind of thread sealant by chance? I have used Permatex high temp thread sealant that you can get at the store (very small white tube, $12) as well as a big tub of LA-CO 42019 high temp thread sealant paste (8oz, $20 Amazon). I haven’t had issues with either one Good luck, Eric |
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CMDR_Boom
Member
Joined: September 2019
Posts: 38
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Post by CMDR_Boom on Aug 22, 2024 8:56:57 GMT -5
I would avoid the furnace cement and just stick to anti-seize. I've tried a number of commercial ceramic sealants for experimenting on plug and sensor sealing duty. Even with the best prep, they don't handle vibration well and flake off, crack, or will generally fail at the worst possible time (especially around anything that produces net positive pressure). I've made a few ceramic-buffed phenolic resin putties that work quite well, but they are definitely not meant for being able to remove the fittings, to the point that they bond so strongly that you would have to destroy any substrate to get them off. I can, unfortunately, send you pictures of that exact case stated above with a broken ignitor plug that gave up trying to remove it before the resin broke. Fortunately, just found this stuff. Thread sealant designed for 1800 fahrenheit and is used in the gas turbine industry. Just vetted the spec sheet out and looks legit. I am going to return the furnace cement and anti seize and give this stuff a try. Will update in a week or so when it comes in and I test it. That looks like pretty decent stuff. Depending on where you're located, Skygeek is a great place with reasonable prices that caters to the aero market when you're looking for application-specific stuff like this. They carry just about everything and most of the time have mil-spec standards for listed products right on the product page. I wouldn't mention anyone I'd not had a favorable experience with, but don't mind giving my approval where it's been earned. Henkel (the company most associated with LocTite) has a number of products in the aerospace/industrial segment that perform extremely well in adverse use cases, too. Their higher-tier stuff usually comes with a yellow box and a model or product number that make it super easy to look up specifications. Between Henkel and BASF, they have products that will cover 99% of what you could ever want to do that fits a select niche. Back to Skygeek though, I've gotten a lot of turbine stuff through them like jet turbine oil cases, protective products, etc. In case you need somewhere that is a mainline distributor that will also order things for you in the event you don't have a business ID that some specialty equipment or chem companies will require to ship restricted products. |
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cebaero
Junior Member
Joined: August 2024
Posts: 52
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Post by cebaero on Aug 22, 2024 13:42:01 GMT -5
That looks like pretty decent stuff. Depending on where you're located, Skygeek is a great place with reasonable prices that caters to the aero market when you're looking for application-specific stuff like this. They carry just about everything and most of the time have mil-spec standards for listed products right on the product page. I wouldn't mention anyone I'd not had a favorable experience with, but don't mind giving my approval where it's been earned. Henkel (the company most associated with LocTite) has a number of products in the aerospace/industrial segment that perform extremely well in adverse use cases, too. Their higher-tier stuff usually comes with a yellow box and a model or product number that make it super easy to look up specifications. Between Henkel and BASF, they have products that will cover 99% of what you could ever want to do that fits a select niche. Back to Skygeek though, I've gotten a lot of turbine stuff through them like jet turbine oil cases, protective products, etc. In case you need somewhere that is a mainline distributor that will also order things for you in the event you don't have a business ID that some specialty equipment or chem companies will require to ship restricted products. Thanks a lot, I'll check them out! |
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