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Old May 30, 2011, 07:45 PM
Master of Creative Crashing
United States, MI, Berrien Springs
Joined Mar 2011
47 Posts
Question
Thread Lock for Plastic?

What should be used as thread locker for metal-to-plastic? I know blue Loctite is not good for plastic. I've read that many people use CA, but there are many types of CA--on my workbench I have four different kinds, but I don't know which (if any) will work.

The reason I ask that that I'm having trouble with things popping off my heli in flight. As I understand it, this is not good. I've used blue Loctite on everything metal-to-metal, and they're holding fine. It's the metal screws in plastic that's the problem.
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Last edited by JakeAB; May 30, 2011 at 09:13 PM.
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Old May 30, 2011, 08:21 PM
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Quote:
Originally Posted by JakeAB View Post
What should be used as thread locker for metal-to-plastic? I know blue Loctite is not good for plastic. I've read that many people use CA, but there are many types of CA--on my workbench I have four difference kinds, but I don't know which (if any) will work.

The reason I ask that that I'm having trouble with things popping off my heli in flight. As I understand it, this is not good. I've used blue Loctite on everything metal-to-metal, and they're holding fine. It's the metal screws in plastic that's the problem.
Loctite makes a special blend for metal to plastic but it's essentially CA. http://www.labsafety.com/search/Loct...58/?type=brand

A little bit of any CA should work fine.
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Old May 30, 2011, 09:12 PM
Master of Creative Crashing
United States, MI, Berrien Springs
Joined Mar 2011
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Originally Posted by Xrayted View Post
Loctite makes a special blend for metal to plastic but it's essentially CA. http://www.labsafety.com/search/Loct...58/?type=brand

A little bit of any CA should work fine.
Yeah, I've seen Loctite 425, but at $20 for a 20g bottle, that's awfully expensive CA. I'd like to know what makes it special.

I have thin, medium and thick CA, just plain CA with no special formulation. Is any thickness better than others, or should I just split the different and use medium?
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Old May 30, 2011, 09:21 PM
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Originally Posted by JakeAB View Post
Yeah, I've seen Loctite 425, but at $20 for a 20g bottle, that's awfully expensive CA. I'd like to know what makes it special.

I have thin, medium and thick CA, just plain CA with no special formulation. Is any thickness better than others, or should I just split the different and use medium?
It's pretty much the same stuff so don't waste your money. The thinner ca will wick into the threads easier.
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Old May 30, 2011, 09:22 PM
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Quote:
Originally Posted by JakeAB View Post
Yeah, I've seen Loctite 425, but at $20 for a 20g bottle, that's awfully expensive CA. I'd like to know what makes it special.

I have thin, medium and thick CA, just plain CA with no special formulation. Is any thickness better than others, or should I just split the different and use medium?
If the hole is not stripped out, thin CA is fine. If the hole is stripped, thick CA is good.
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Old May 31, 2011, 03:16 AM
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Denver, CO
Joined Dec 2005
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Thin can be messy, since it runs. I use medium. It dries a little slower, so is easier to use.
You might be over tightening the screws.
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Old May 31, 2011, 04:00 AM
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Everett,Washington
Joined May 2005
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Quote:
Originally Posted by JakeAB View Post
Yeah, I've seen Loctite 425, but at $20 for a 20g bottle, that's awfully expensive CA. I'd like to know what makes it special.

I have thin, medium and thick CA, just plain CA with no special formulation. Is any thickness better than others, or should I just split the different and use medium?
All loctite is expensive I agree with Rob,medium gives you more time,and is a little stronger than thin. Thin is good for holes in wood,because it soaks in better.
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