You should NOT use any type of thread sealant on brake lines, as it should never be needed. Certainly not JBWeld, not Loctite
Loctite
Loctite is a German-owned American brand of adhesives, sealants and surface treatments that include acrylic, anaerobic, cyanoacrylate, epoxy, hot melt, silicone, urethane and UV/light curing technologies. Loctite products are sold globally and are used in a variety of industrial and hobbyi…
Full Answer
Do I need to use sleant on brake fittings?
Never used anything on brake fittings … if a leak occurs, you're doing something wrong. Click to expand... That is only true for flared/tapered fittings - some brake parts use NPT threads and do require the use of sleant. Mr48chev and Truckdoctor Andy like this.
Do I need a thread sealer?
Yep, you should not need any sealer. If you need some assurance put a dab of teflon paste on the threads. olscrounger and INVISIBLEKID like this. Also recommend the Permatex 54540. I use it on the threads and it works great. Doublepumper likes this.
Do you use thread tape or tape to seal threads?
In a perfect world taper cut threads would always seal , we all ( should) know , that ain't happening . Thread dope , sealer , paste , tape is used as much as a friction reducer - anti- gall agent as much as anything. jimgoetz, tb33anda3rd, Chucky and 4 others like this.
Can you use Teflon tape on brake fittings?
It's best to stay away from Teflon tape on any brake/fuel system. Just use any good pipe thread sealant (paste) with Teflon or PTFE, and only on pipe fittings. Doublepumper likes this. Never used anything on brake fittings … if a leak occurs, you're doing something wrong.
Do you use thread tape on brake lines?
No. You cannot safely, nor should you attempt to use Teflon tape on brake lines. A brake system should not rely on anything to stop a leak. The system relies on pushing a solvent under high pressure in a closed system for safe operation, and Teflon tape will threaten the integrity of that system.
How do you seal brake line threads?
How to Seal Flare Fitting ConnectionsUnscrew the brake line from the fitting.Clamp the appropriate-sized collet around the line.Connect it to the Surseat lapping tool.Spray some lubricant to the lapping head before using it.Rotate the lapping head back and forth about 6-10 times.Clean and inspect the flare.More items...•
How do you stop brake line fittings from leaking?
0:522:13How to | Prevent a Brake Line Fitting from Leaking - YouTubeYouTubeStart of suggested clipEnd of suggested clipSlide the tube nut up and tighten with your fingers. Now that the nut is finger tight use a lineMoreSlide the tube nut up and tighten with your fingers. Now that the nut is finger tight use a line wrench to tighten the nut snug. Then half turn to see the flag.
What do you coat brake lines with?
When replacing the brake lines, cover them with something like POR15. This stuff bonds with, coats, and changes the metal making it impervious to rust.
What type of thread are brake line fittings?
The most commonly confused sizes are 3/8” with 10 mm, and 7/16” with 11 mm. The 3/8” x 24NF will screw into M10 x 1 thread but not the other way around, so always try to screw M10 x 1 into 3/8” x 24NF to see if you have a match.
How tight should brake unions be?
They need to be reasonably tight as you're effectively deforming the end of the flare to create the seal. Light ipe of copper slip on the thread section should make them easy enough to undo later.
Can you over tighten a flare fitting?
Fourth, don't over-tighten the flare fitting, as this can cause leaks.
Are Compression Fittings safe for brake lines?
In addition, compression fittings are known to leak when used on brake lines, causing a loss in brake fluid, and ultimately failure of the braking system. You cannot, under any circumstances, use compression fittings to repair the lines on a public transportation vehicle.
How do you seal flare fittings?
1:236:18How to make a flare fitting seal - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo then you've got just a little bit on the surface. And tighten it up hook it absolutely crazyMoreSo then you've got just a little bit on the surface. And tighten it up hook it absolutely crazy tighten them down I mean they need to be tight. But don't get nuts on. And use two wrenches tighten.
How do I protect my steel brake lines?
0:554:01how to make your brake lines last LONGER (chemical treatment)YouTubeStart of suggested clipEnd of suggested clipIt's made by Loctite. And what this does is it chemically neutralizes the rust. So won't continueMoreIt's made by Loctite. And what this does is it chemically neutralizes the rust. So won't continue resting through so this is great for like light surface rust.
Is copper nickel brake line safe?
Copper nickel brake are DOT approved for hydraulic use. PSI ratings for copper nickel are only a little lower than stainless steel. Copper nickel brake line offers strong corrosion resistance both inside and outside.
How do you join brake lines together?
0:492:50How to connect brake lines with new fittings & a union - YouTubeYouTubeStart of suggested clipEnd of suggested clipLike so and you get them at that point there to join them up. You put this in the middle. That'sMoreLike so and you get them at that point there to join them up. You put this in the middle. That's fitting here one or the other tighten up your brake line flipping fitting.
Zig Member
Soooo I installed all my lines, bled everything, ended up with that much sought after "firm" pedal, checked all fittings for leaks and found 4. Each one (as you might remember if you read the installing disc brakes on 6 lug hubs) (or whatever the hell it is called) came from the factory fitting in the residual pressure valves I installed.
john1 Member
I take it the leak is where the flare adapter threads into the residual pressure valve. If so, this is a standard 1/8"pipe thread and can be sealed with teflon tape, or at least this fix has worked for me in the past. If the leak is where the brake line attaches to the flare adapter you'll have to re-flare / replace the line.
Bill Hanlon Member
I agree with John on no dope/tape/sealant of the double flare fittings.
Zig Member
Yes, this is on their end, not mine. The fluid is coming out of the fitting that screws into the body of the valve.
Chiro Member
Did you flare the ends yourself? If so, it may be your flares. Hard to do correctly. Ask me how I know.
john1 Member
I wouldn't worry about using teflon tape on the pipe thread end of the adapters. Max pressure to the front brakes will be around 1000 -1200 psi with the rear brakes being about half of that.
morabuffalo Member
I would not put any faith in some gunk on the threads...not a science thing, but have done it to get me home! Recently, went thru some vintage lines on a trailer and 54 panel...found out that now there are all kinds of fittings, sizes, and configurations or ji-rations. Some in, some out, some doubled, some flat, some long, some short...
What does F mean on a thread?
The F stands for fuel. The roots and crests on the thread contact each other which eliminates the spiral path of the standard NPT threads. Hardware store fittings are most likely standard threads. Sometimes no leaks, sometimes leaks.
Can liquid sealant be taped?
The system will breakdown liquid sealants but not tape. It ends up in areas that can cause a lot of grief. One other thing; the pipe used for those systems is not off the shelf at the plumbing store. It is pickled, oiled and plugged (POP) to clean it and keep it clean during storage.
Is Teflon tape needed for brakes?
In a plumbing application, Teflon tape or pipe dope is required as the threads are metal to metal contact. Teflon tape is not recommended on any hydraulic system including a brake system. One small piece of Teflon that comes loose can cause havoc in a hydraulic system.
Does taper cut thread seal?
In a perfect world taper cut threads would always seal , we all ( should) know , that ain't happening . Thread dope , sealer , paste , tape is used as much as a friction reducer - anti- gall agent as much as anything.
Can you use Teflon tape on brakes?
Click to expand... It's best to stay away from Teflon tape on any brake/fuel system. Just use any good pipe thread sealant (paste) with Teflon or PTFE, and only on pipe fittings. Last edited: Apr 1, 2019. V8 Bob, Apr 1, 2019.
Do NPT fittings need sealer?
Ok if you use aftermarket flex lines there would be NPT fittings, but OE lines are not NPT . Actually NPT fittings shouldn't require any sealer because they are tapered do they seal when tightened
