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Best Epoxy to Use on Project with Rare Earth Magnets

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Forum topic by Deela40 posted 06-11-2017 02:06 AM 3135 views 0 times favorited 27 replies Add to Favorites Watch
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Deela40

105 posts in 2927 days


06-11-2017 02:06 AM

Topic tags/keywords: question walnut tablesaw

I have been using J-B Weld to attach two rare earth magnets to clothespins to make them into fridge magnets, but the magnets are popping off after roughly 6 months. Does anyone know of a better epoxy that would hold the magnets long term?

-- www.heritageclothespins.com


27 replies so far

View Rich's profile

Rich

1984 posts in 428 days


#1 posted 06-11-2017 02:20 AM

I use Bob Smith Industries brand and am happy with it. However, I can’t say that it would do any better than what you’re using. Is there a way to score the back of the magnet, or otherwise make it so there is more of a mechanical bond to it?

-- No matter how much you push the envelope, it'll still be stationery.

View papadan's profile

papadan

3584 posts in 3207 days


#2 posted 06-11-2017 02:56 AM

I use regular 5 minute epoxy, but recess the magnets about 1 /32nd to prevent them from contacting the surface. They hold tight but are easy to pull off without losing the magnets.

View Kelly's profile

Kelly

1821 posts in 2783 days


#3 posted 06-11-2017 06:06 AM

You did sand the part you are gluing, right?

I’ve glued panels on using five minute (now I use 2 to 1, 24 hr) to hold panels in place (a hidey hole in a customer’s bathroom) and they are still holding six years later.

View Rich's profile

Rich

1984 posts in 428 days


#4 posted 06-11-2017 06:12 AM



You did sand the part you are gluing, right?

- Kelly

I really dislike this sort of reply. It implies that you are stupid if you didn’t do something. I suggested the same thing but as just that — a suggestion.

-- No matter how much you push the envelope, it'll still be stationery.

View bobasaurus's profile

bobasaurus

3355 posts in 3023 days


#5 posted 06-11-2017 06:34 AM

I’ve been using west system g/flex lately and it’s really impressive. Long cure time, though. I mix it on a lab scale to get it just right.

-- Allen, Colorado (Instagram @bobasaurus_woodworking)

View Kelly's profile

Kelly

1821 posts in 2783 days


#6 posted 06-11-2017 06:40 AM

Richy, first, your response smells of presuming what you wanted it to. Second, your presumption is erroneous. Third, it equates to telling me I’m stupid because I didn’t have you play ghost writer and check my wordage to insure it met your, likely, biased standards.

It inspires a suggestion, but the suggestion wouldn’t be germane to the matter of holding magnets in place.

You did sand the part you are gluing, right?

- Kelly

I really dislike this sort of reply. It implies that you are stupid if you didn t do something. I suggested the same thing but as just that — a suggestion.

- RichTaylor


View RobS888's profile

RobS888

2316 posts in 1684 days


#7 posted 06-11-2017 07:02 AM



Richy, first, your response smells of presuming what you wanted it to. Second, your presumption is erroneous. Third, it equates to telling me I m stupid because I didn t have you play ghost writer and check my wordage to insure it met your, likely, biased standards.

It inspires a suggestion, but the suggestion wouldn t be germane to the matter of holding magnets in place.

You did sand the part you are gluing, right?

- Kelly

I really dislike this sort of reply. It implies that you are stupid if you didn t do something. I suggested the same thing but as just that — a suggestion.

- RichTaylor

- Kelly

I agree with Rich (!) on this. It sounds offensive to ask that way when a simple “did you sand first” would have sufficed.

Your response to Rich is offensive as well, perhaps you are having a bad day.

Of course your regular type of response to me, will make all of your responses on this thread offensive.

-- I always suspected many gun nuts were afraid of something, just never thought popcorn was on the list.

View Rich's profile

Rich

1984 posts in 428 days


#8 posted 06-11-2017 09:20 AM

Whatever, Kelly. I see (and it’s there in black and white, even in your rude response to me) that you were moved to edit your reply. I’ll take credit for that, and I’ll give you credit for recognizing your error and making an attempt to fix it.

-- No matter how much you push the envelope, it'll still be stationery.

View Desert_Woodworker's profile

Desert_Woodworker

1281 posts in 1053 days


#9 posted 06-11-2017 10:34 AM

Now here comes Rich- You dislike this!

You did sand the part you are gluing, right?

- Kelly

I really dislike this sort of reply. It implies that you are stupid if you didn t do something. I suggested the same thing but as just that — a suggestion.

- RichTaylor

You are a hypocrite- Here is an example of how Rich Taylor operates and how he attacked me on a Forum- Troll
“I have to say that, at first, your comment pissed me off. It’s an affront to Bob Lang as well, for no fault of his own. That you think I’m controlling his “pitch” is very odd indeed. I mention Frank Klausz and Dave Marks frequently too because I admire their work and teachings. Do you think they’re in cahoots with me too?
No dude, I’m not pissed at all. In fact I’m concerned about you. Maybe the fidget widgets have messed with your head, but when I saw your rant to vonhagen (whoever that is) on your profile page, I realized you have a problem.
I’m happy to move on. However, I do ask that you leave me out of any future hallucinations that you have. I’m on here to learn and share. Guess what, the next time someone asks for SketchUp advice, I’m going to mention Bob — and I haven’t even gotten a free book out of it. I’ll be referencing other helpful sources as well.
Take care.
—No matter how much you push the envelope, it’ll still be stationery.”
from Rich Taylor

-- Desert_Woodworker

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Desert_Woodworker

1281 posts in 1053 days


#10 posted 06-11-2017 10:39 AM

Dee- I have not had problems with fridge magnets, but I use “Gorrila glue”. You will need to clamp it, due to the expansion of the glue; best to all of us.

-- Desert_Woodworker

View Desert_Woodworker's profile

Desert_Woodworker

1281 posts in 1053 days


#11 posted 06-11-2017 10:43 AM


Richy, first, your response smells of presuming what you wanted it to. Second, your presumption is erroneous. Third, it equates to telling me I m stupid because I didn t have you play ghost writer and check my wordage to insure it met your, likely, biased standards.

It inspires a suggestion, but the suggestion wouldn t be germane to the matter of holding magnets in place.

You did sand the part you are gluing, right?

- Kelly

I really dislike this sort of reply. It implies that you are stupid if you didn t do something. I suggested the same thing but as just that — a suggestion.

- RichTaylor

- Kelly

I agree with Rich (!) on this. It sounds offensive to ask that way when a simple “did you sand first” would have sufficed.

Your response to Rich is offensive as well, perhaps you are having a bad day.

Of course your regular type of response to me, will make all of your responses on this thread offensive.

- RobS888


Don’t worry Kelly- this is another “one- project” hot air baloon….

-- Desert_Woodworker

View Tony_S's profile

Tony_S

766 posts in 2922 days


#12 posted 06-11-2017 12:48 PM

Simple question….meet complete train wreck…

I’ve never run into an issue. A quick sand on the back, and whatever epoxy was on hand. Maybe sand the long edges as well and apply more epoxy than you normally would.

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

View OnhillWW's profile

OnhillWW

112 posts in 1071 days


#13 posted 06-11-2017 01:40 PM

Another option – Thick CA glue. I use it regularly, faster and safer.

View waho6o9's profile

waho6o9

8034 posts in 2416 days


#14 posted 06-11-2017 01:46 PM

It’s wise to sand so the adhesive can take hold.

Now have some fun and make some saw dust…...

View Chris Cook's profile

Chris Cook

300 posts in 2120 days


#15 posted 06-11-2017 02:04 PM

While this solution may not work at the scale for your application:

I have done a lot with magnets in wood working and always find a way to adapt this small disc magnets:

https://www.magcraft.com/magcraft-nsn0579?feed=Froogle&gclid=CjwKEAjw1PPJBRDq9dGHivbXmhcSJAATZd_Bgk1i9JyjLOwq7zJGlJ6Y2bR5c3X22civhs_BwmkwuBoC1-fw_wcB

I drill a slightly smaller hole and press these in, no glue. They hold quite tightly and work well.

-- Chris, "all we are is sawdust in the dust collector""

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