Which Compound for building up?

Sniffer

Sniffer

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I am at the early stages of a minor repair and need some advice on which product to use.

I need to add a very slight amount of something to a steel surface (it may have to adhere to aluminum too but I doubt it) and I am thinking epoxy or something along those lines.

Needs to have good adhesion, be able to be applied very thinly (this is the most important part), good strength and can be sanded / polished to the correct thickness.

I have not used any of these types of products but I have heard of JB weld / Devcon etc but if there is something better out there I am all ears.
 
jamesharrison said:
Can you be more specific with regard to what materials you want to bond & to what conditions it is exposed to?
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No bonding, of parts this is simply to build up a metal (probably steel but may be aluminum as I haven't seen it first hand yet) surface that has worn down a little and is causing an issue.

Wont be exposed to heat, it is hidden so colour is unimportant, needs to adhere well but doesn't need crazy amounts of mechanical strength and be applied thin.
 
I think it would be simpler if you just tell us what it is, you are so vague that you only gonna get vague suggestions if any !
Anyway I would suggest “all metal” bound to anything metal and can be sanded, drilled, tapped and painted
 
JamesH - The 'no bonding' I think means it's Not bonding 2 things. It does have to bond to ONE surface. adamthebad has the best solution I think, unless the Epoxy is soft. Maybe the JB-weld is a better solution if there will be 'pressure or friction' involved, like the inside of a receiver that may get some 'wear pressure' from a passing Bolt or the like.
 
Sniffer said:
Needs to have good adhesion, be able to be applied very thinly (this is the most important part), good strength and can be sanded / polished to the correct thickness.
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Check out Petmatex 380, it's not cheap - I just payed $60 for an ounce, but it is the best for low clearance, high impact and/or high vibration application's.

I think it does its best work around .005" clearance or so, Permatex 480 is slightly more viscous and better on slightly higher clearance applications.

Loctite 380 Black Max is a black, low-viscosity, rubber-toughened, 1-part cyanoacrylate adhesive designed for fast, durable bonds in close-fitting applications. It offers high peel, impact, and shear strength on rubber, metal, and plastic, with a 90-second fixture time and full curing in 24 hours. [1, 2, 3, 4]


Key Features and Benefits
  • Rubber Toughened: Provides superior flexibility, shock, and vibration resistance.
  • Performance: Offers a shear strength of 3750 psi and tensile strength of 2700 psi.
  • Fast Curing: One-part formula, no mixing required.
  • Temperature Range: Operates effectively from -65°F to 225°F (-54°C to 107°C).
  • Low Viscosity: Ideal for wicking into small gaps ($<0.006$ inches). [1, 2, 3, 5, 6]
Common Applications
  • Bonding metal, rubber, and plastics.
  • Applications requiring high impact resistance.
  • Industrial maintenance and repair.
  • Ideal for situations where thermal cycling or vibration is present. [1, 2, 3, 6]
Handling and Usage
  • Surfaces should be clean, dry, and free of grease.
  • Cures in 90 seconds to 120 seconds.
  • Avoid use with strong oxidizing materials. [7]
 
DGY said:
I think it would be simpler if you just tell us what it is, you are so vague that you only gonna get vague suggestions if any !
Anyway I would suggest “all metal” bound to anything metal and can be sanded, drilled, tapped and painted
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The problem is I am not sure what the issue is as it is not my firearm and I haven't seen it with my own eyes.

The issue is on a shotgun and the description I got was poor to say the least (mention of "round thing" in the "pipe" seemed "loose" and "came out to far"). Non technical person and not a hardcore gun owner but I owe them a favour so they asked if I would look at it and here we are.

I am thinking the magazine follower or receiver is worn and is coming out too far causing issues / jams etc. Trying to ensure I have access to what I need if this is the case (have a couple of followers I can swap and try, would be an easy first step but if that don't work it will require more extreme measures).

This can be my good deed for the year. Hoping it is easy but suspect it wont be.
 
Buck1950 said:
JamesH - The 'no bonding' I think means it's Not bonding 2 things. It does have to bond to ONE surface. adamthebad has the best solution I think, unless the Epoxy is soft. Maybe the JB-weld is a better solution if there will be 'pressure or friction' involved, like the inside of a receiver that may get some 'wear pressure' from a passing Bolt or the like.
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100% accurate.

I don't believe there will be a ton of pressure (follower under spring pressure maybe?) and some friction with rounds going into / out of the magazine.
 
bondoa-professional-fast-dry-filler-pint-93caccbe-caba-421a-acac-8cae6dd8cd99-jpgrendition.jpg
 
Sniffer said:
...(mention of "round thing" in the "pipe" seemed "loose" and "came out to far")...
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Choke tube?

I suggest figuring out what the story actually is, right now it's the blind leading the blind. No sense asking for advice at this point.
 
aluminum and steel think Areonatical.

6061 is the low end of the scale in Aluminum
versus
2024. 7050, 7075 aluminum
The reason it gets a bad reputation is that it is soft and gummy compared to high-end alloys. If you try to machine it with the wrong speeds, feeds, or tools, it will instantly clog your cutters and leave a terrible surface fiinish.
One does what they have to, however look into 3m, Henkel Loctite Hysol Series, or Metalset A4.
 
Lodi said:
Choke tube?

I suggest figuring out what the story actually is, right now it's the blind leading the blind. No sense asking for advice at this point.
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No, choke tube could not jam the gun up so not that.

From the jumbled information I got it sounded like a follower issue. They are coming from out of town and will only be here for a short time so want to ensure I am prepped with something suitable.
 
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