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OT: RTV or silicon tape?

Geo-TH,In

Geo-TH,In

Well-known Member
I used teflon tape on a 3/4 inch brass shutoff valve to air compressor. It leaked, I was going to use pipe dope with teflon, but it was dry and hard, so experimented with RTV. Used gas leak detector soap and no bubbles.
RTV IS THE WINNER, which surprised me.
George
 
Asking that question makes me feel like you must think I'll an idiot that just got off the boat from a third world country.
Sorry for the venting.
George
 
Geo, your comments lead to those assumptions.

There is absolutely NO reason tape will not work, if installed and tightened correctly. The fittings should not leak even with NO tape.

You are doing something wrong, face it.
 
I do not care for Teflon tape on metal fittings myself for that reson. I have a can of Key Tite sealer that works good for me. Stan
 
Teflon tape is a no-no for aircraft fittings, due the possibility a bit of tape might block an oil passage or other critical passage.

I normally use pipe dope with teflon, but I've found it doesn't always work when Chinese fittings are involved. I often find I need to use both dope and tape.
 
I'm tired of criticism too.
Ask myself why do I put up with some replies on YT. I had to vent.
Perhaps I've outgrown this place.
George
 
George I was introduced to teflon tape as a thread sealer fifty years ago as you probably were too. Lately I have heard teflon tape is is a thread lubricant and it might seal the threads too. In a perfect world we should not need thread sealer but not many pipe threads are cut perfectly centered with consistent thread depth all the way around, meaning Chinese. I have put together a lot of hydraulic pipe fittings with no sealer and they sealed up just fine but maybe the oil was the lubricant allowing me to get it a bit tighter. Plastic fittings are supposed to not need a sealer but anyone who has pumped liquid nitrogen through plastic fittings finds out the fittings need teflon AND pipe dope together and the fitting might still leak.
 
Re-read your first post on this subject. You sound like you have no idea what you are doing and are asking for input. Then you chastise someone for pointing out what has been used in the industry for years and get all uppity.
Sorry, That's my take on it and I usually enjoy reading your posts!
 
Just had my young plumber pal here today fixing my water pump problem. He has MANY choices of 'pipe dope'. He has never had a leak here. Again, may different products, all of which are specific to the job at hand. He does not use any 'tape' product.
 

BTDT T-tape let me down put pipe dope on it the dope acted as a lube and let me tighten the fitting so the pipe threads would seal..

Thanks china : (
 
George, looking at the picture you posted on Tool talk I can see why he asked that question. Piece of tape hanging down about 2-3 inches.
cvphoto5094.png
 
You know George,
You make about 80 posts a day all over this site about all kinds of extraneous stuff. Do you really expect praise for every single one of them?
I think you do some goofball things and rarely read or comment on your stuff because of it.
The more posts you make the more criticism you should be able to take.
 
Tape and pipe dope are designed to be a lubricant, not an actual seal. Sometimes they work, sometimes they don't.

In this case you had an occasion where they didn't, and found a solution that did, and that's a good thing.

My only question is why all of the negativity from other members?

Seriously guys, as a mechanic by trade, I'd just about bet I could go over your machines and find something to insult nearly everone over. Whether it's a nail in place of a cotter key, Teflon tape on a JIC fitting, bailing wire for a clamp, or whatever, I've seen it done by the very people who tend to be the first in line to insult something others have done.

Ultimately, many of us were taught that if you can't say something nice, don't say anything at all.....Sadly I think some have forgotten that.
 
___________________________________________________
Mark,
I have a friend who is a plumber specializing in furnace installations.
I worked with him when he installed an LP gas boiler in my granddaughter's house.
He said the same thing about the Chinese fittings.....the "fit and finish' just isn't there.
He uses both teflon tape and pipe dope on all of his threaded fittings.
The pipe dope he uses is high quality stuff that is rated for both water and gas.
Click to expand...
 
I have been using silicon on pipe fittings for years. The great thing is, that 5 years from now, it will come apart like you put it on yesterday. Also, it takes twice as much time to mess around with the tape. I just use the cheap old clear house silicon. Looks like a lot of petty attack dogs are awake today. No wonder people are leaving this site. This used to be a good site.
 
Silicon as a pipe sealent would be pretty rough on the fittings.
Might as well sprinkle sand on the threads.

Silicone would be a better choice than silicon any day when the proper tape or dope is not available.
 
I'm 66 and have been using Teflon Tape since I was 17 (I used to do pool plumbing for a living). I just installed a new Harbor Freight air hose reel last week and use tape on all the fittings. None leaked. I have never had a fitting look like that after tightening. I think I know, but some how the tape was put on wrong.
 
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