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Marine Tex Hardner

nmkid

nmkid

Gold $$ Contributor
So, the last time I bedded a rifle, (2 years ago) I inadvertently didn't tighten the lid on the bottle of hardner enough. Is it ok to use a different hardner? Like J-B Weld hardner?
 
nmkid said:
So, the last time I bedded a rifle, (2 years ago) I inadvertently didn't tighten the lid on the bottle of hardner enough. Is it ok to use a different hardner? Like J-B Weld hardner?
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Maybe. "Hardener" is generally diamine for epoxies and has a very specific formula for each resin. Basically it starts as linear polymerization then as that grows it begins to cross link and molecular weight grows very rapidly. Its controlling this process that effects cure time and strength.
 
It looks like I might have to resort to using the complete kit of J-B Weld. It will be just for the recoil lug. If I wasn't pressed for time I would just order another Marine Tex kit.
 
Fast14riot said:
You need to make exactly 100 bologna sandwiches and realize you left the package of bologna open and its no good. You decide to try and substitute salami in all of them, and an unknown amount. "Maybe" it'll work without any salami left over, or not enough, or everyone hates salami.

Thats kind of how epoxies work.
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LMAO...
 
Think of taking a bunch of nickle sized magnets and stacking one on top of the other. Stack 100 of them together, then make another stack the same size. Thats the first part, then get the stacks together to where they will stick to each other, thats the second part.
Hope this is a correct analogy, my chemistry was decades ago.
 
Fast14riot said:
You need to make exactly 100 bologna sandwiches and realize you left the package of bologna open and its no good. You decide to try and substitute salami in all of them, and an unknown amount. "Maybe" it'll work without any salami left over, or not enough, or everyone hates salami.

Thats kind of how epoxies work.
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Freakin excellent explanation !
 
338 Mollett said:
I get it LOL it has been a dull Sunday !
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I don't claim to understand it or what it really means, but I have used epoxy's quite a bit. I've been involved with race boat for years and used epoxy and variations of epoxy for numerous project.

I've followed the manufactures instructions and had very good and predictable results. I've spent hours learning from different manufactures of epoxy and been convinced to follow the instuctions to the letter for best results.
 
ELR LVR said:
Freakin excellent explanation !
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If one reads between the lines of my explanation, you can also visualize what happens if you mix incorrect amounts of the correct hardener. Sure, it'll cure faster with more hardener, but too much and you'll have excess floating around in the mix which will reduce overall strength. There is usually an allowable margin of error when mixing, but for best results always mix by weight, which is a different ratio than by volume.

Further into proper mixing, correct technique is often the 3 cup, 2 stick method. Side A goes in cup A, side B in cup B. Add one to the other in one cup and mix for 1 minute with stick 1. Then dump into cup C and use stick 2 to scrape everything down and continue mixing. This will keep from having un-mixed product stuck to the sides or stir stick.
 
Fast14riot said:
If one reads between the lines of my explanation, you can also visualize what happens if you mix incorrect amounts of the correct hardener. Sure, it'll cure faster with more hardener, but too much and you'll have excess floating around in the mix which will reduce overall strength. There is usually an allowable margin of error when mixing, but for best results always mix by weight, which is a different ratio than by volume.

Further into proper mixing, correct technique is often the 3 cup, 2 stick method. Side A goes in cup A, side B in cup B. Add one to the other in one cup and mix for 1 minute with stick 1. Then dump into cup C and use stick 2 to scrape everything down and continue mixing. This will keep from having un-mixed product stuck to the sides or stir stick.
Click to expand...
Well since our eyes are more sensitive than our ears, (More sensitive to differing frequencies that is)
I mix according to color lol
 
Guys
Marinetex is Very ratio sensitive! get the mix off a little and its wonderful properties go out the window--the smallest kit is a great deal--you always have fresh--you mix All of the hardener in and are assured of a perfect mix--it ain't Bondo
Read the instructions
 
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