scotch weld 420 epoxy

[porthos]

what on earth would make appx. 16 0z. of this epoxy worth over $1,000.00?? what is so special that causes it to be so expensive??

[Polymath]

I went and looked on Amazon and that was for a 5-gallon pail the 16 oz was about $45 bucks. Still pretty steep.

[dannyd]

Someone may have quoted you the US Military price and not the normal price.

[JonB_in_Glencoe]

you can get epoxy at the Dollar store ;) ...for a dollar.

[Mytmousemalibu]

Sounds like an aviation supplier price.

[porthos]

guess i better double check!!

[varmintpopper]

Wouldn't want to fly in aircraft that used dollar store epoxy

[imashooter2]

you can get epoxy at the Dollar store ;) ...for a dollar.

Yes indeed, you can get epoxy not worth a dime for only a dollar.

[Milsurp Junkie]

Really depends on where it was used.

[farmbif]

good stuff, if you take a look through mscdirect there are many many different very specialized epoxies, and as mentioned above some are very expensive.
scotch makes some outstanding products to meet or surpass different engineering specs.

this place is a great source for bulk epoxy products for many general applications

https://fiberglasssupplydepot.com/Epoxy-Resin-and-Glue.html

[imashooter2]

Sounds like an aviation supplier price.

With aircraft, it’s the certs that cost more than the actual product.

[farmbif]

there are a couple other brands that I can't think of right now. I remember a buddy who had some project they took into his shop and had to buy some sort of special epoxy and it was crazy expensive like a couple hundred dollars for a box that was about the size of a half gallon of milk.

[farmbif]

on an epoxy side note the bedding epoxy brownells sells in little packages. other less costly epoxies can be substituted and mixed with cabosil or microbaloons to make a paste any thickness you want. marine tex works real well.

[GhostHawk]

I have had very good luck with Harbor Freight Epoxy and JB Weld.

5 min epoxy for 8$ for 3 oz.

https://www.harborfreight.com/quick-setting-epoxy-68386.html

[MostlyLeverGuns]

Two ounces of JB Weld is $5.18, that makes 16 ounces over $40 bucks. The modern marvel plastics, glues and even steel alloys are expensive until the cheap stuff fails, then they seem like a good deal.

[Bmi48219]

Yes indeed, you can get epoxy not worth a dime for only a dollar.

The dollar store near us is now a $1.25 store. Way to go Brandon!

[David2011]

I’ve been building flying model airplanes for over 50 years. I won’t use any brand of 5 minute epoxy on anything.

[country gent]

I dont remember the name but we had an epoxy at work for gluing carbon together for edm electrodes. It was very expensive but also had to be able to conduct the electric thru the joint. It was very expensive also. The specialty epoxies ( conductive, Higher heat ranges, grits to maintain bond, shock resistance.) can get expensive. Sham Bam way lock was another one I worked with 800* temp grit to maintain bond thickness. It is used mainly for installing turcite on ways when rebuilding machines. It also has 4 hour working time and 24 hour full cure time.

[Shawlerbrook]

JB Weld is a very good product. When you need something to do something and do it right do not use price as a measuring stick.

[fixit]

I share the disdain for five minute epoxies. Just reading the spec details will quickly tell you the accelerated curing comes at a cost, not to mention, I've had too many times where I mixed a batch of the quick stuff, and ran out of time before I could use what I needed! Give me the half hour stuff, every time!

[gwpercle]

JB Weld is a very good product. When you need something to do something and do it right do not use price as a measuring stick.

And whatever you do ... Do Not Get that fast setting stuff ... not enough working time and the quick-set makes a weaker bond than the original slow cure J-B Weld #8265S , twin tube , 4-6 hrs. set time ...15-24 hrs. cure time ... 5020 psi tensile strength .
Don't be fooled by $1, 000.00 government glue ...it don't work near as well.
Ask Joe !
Gary

[waksupi]

To find out the right kind of glue to use:

http://thistothat.com/

[Mytmousemalibu]

With aircraft, it’s the certs that cost more than the actual product.

Pretty much, it has to be certified for use on aircraft which opens a whole can of worms. Things like conductivity, temperature ranges, burn certs, etc. Heck we even have a conductive epoxy to attach and bond static wicks to airframes that has enough silver metal in it there is no appreciable resistance on an ohmmeter. A little 1 ounce cup of the stuff is well above $1000. I have a few rolls of tape at work that are $600 a roll. And to boot, it all has an expiration date and one past it, not worth a plug nickel.

Aviation, its a different world!

[porthos]

the only thing that a 5 minute epoxy is good for is if you want to take the parts apart at a later date.

[MostlyLeverGuns]

With most GOOD epoxy's or 'gun bedding' kits, 24 hours is the MINIMUM cure time. That is at 'room temperature' or about 70*F. My shop varies from 55* setback overnight to 65-70* when heated for work for 8 months, then air condition in for some. Warming, 100-140* can speed up cure, like interior of a vehicle in the sun, but I just prefer to wait the extra time. Time vs temperature are important for proper curing, that's just how chemical reactions work. I usually wait an extra day when using JB Weld or other epoxies to insure full cure. The short 'open' times of the 'quick-cures' keep me from even considering them.

[catmandu]

Has anybody found a product that can handle heat? I have a sinker mold that I need to modify. It was a split shot mould that I want to cast slingshot ammo for the grandkids.
I would welcome advise from any that may have tried this before.

Paul in WNY

[Duckiller]

Have cast 45 caliber round ball and used for sling shot ammo. Really works great. For less lethal and grand kids I might look for 32- 35 caliber . have fun.

[JonB_in_Glencoe]

Have cast 45 caliber round ball and used for sling shot ammo. Really works great. For less lethal and grand kids I might look for 32- 35 caliber . have fun.

I like a 36 RB (.350) for use with my wrist Rocket. The garden rabbits hate 'em.

[country gent]

For sling shot ammo Im thinking one of lees buckshot moulds would work well. And youll get 18 pellets a pour.

[GhostHawk]

My sling shot ammo mold is a .45 cal round ball 2 cavity from lyman.

But I agree with country gent that one of the Lee buckshot molds would IMO work pretty well.