Tef-Gel or Loctite?

S

SVTatia

.
Feb 12, 2011
33
Allied Luders 33 Toronto
On applications with dissimilar metals and where back-out prevention is also needed, what would be the choice?
Does Loctite has corrosion resistant properties? Could both be used?
Thanks.
 
Bill Roosa

Bill Roosa

.
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
Loctite blue if you want to be able to easily take them apart again, loctite red requires heat to loosen the fitting up. Both are ok with dissimelar metals and will keep the corrosion down IF you cover the entire threads that are in contact with each other. That can be a bit of overkill in some applications if the threads are long on both pieces.
 
J

Joe5893

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Oct 20, 2006
34
- - Toledo, OH
What is preferred if you have a stainless steel screw going into a plastic threaded device? I am afraid to over tighten the screw and strip out the threads since I am screwing into plastic. I also don't want the screws to back out.

Joe
 
Bill Roosa

Bill Roosa

.
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
If it screws into plastic it probably will not back out. I'm thinking this is not a corrosion issue as plastic does not rust much. I can't advise you if loctite will melt the plastic or not as I have never tired it and it would probably depend on the type of plastic. I have a tube of red at home and will get out my magnifying glass and see if it has iny info.
 
Bill Roosa

Bill Roosa

.
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
Pulled out my loctite blue and it says "for use on metal parts only do not use with plastic parts.
 
redhead78

redhead78

.
Dec 30, 2009
680
jeanneau 38 gin fizz sloop Summer- Keyport Yacht Club, Raritan Bay, NJ, Winter Viking Marina Verplanck, NY
How about a little clear silicone, a good one say GE, It has good adhesive properties, and will work with both plastic and metal.put a dab in the threaded hole, then snug it good. Red
 
S

Steve Dion

.
Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
I would use Tef-gel if you are just putting SS screws into aluminum.

If you are putting something like the mixing elbow together you want to use something that is "heat resistant".

My experience with Loctite is that it is great for screws/nuts/bolts that have a chance of vibrating loose or something really needs to be locked in place. When I worked for Mallory Electric, we made distributors. They would put the cam for the distributor on the shaft with Loctite and bake them in an oven. Did not hear about any of the cams comming loose from the shafts (but it could have happened).

Just use the proper product for the job and you will probably be okay.
 
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