What would happen if you: mixed 3 hour hardener with 5 min. resin?
Would it still set? How strong would the bond be? Not that I did this...
Just checking in case it ever comes up.....

Nope, won't work so good. Stick with equal parts of the same type. And, Yes, I have done this, it just makes a mess.

Unless it is an epoxy system like West Systems which has multiple hardeners and a single resin do not mix and match. Epoxies are formulated as a system that will only work well when the proper parts are mixed in the proper ratios. Even 5 minute epoxies from diferent companies may not work well if you mix part A from one company with part B from the other company.

TFLG

My question actually is, NOT: should one do this, BUT: what would be the result if one did. Looking for technical
information on what would happen chemically. Thank-you.

i guess if you were that curious, you could try it yourself.

I did.

I've managed, over the years, to do various (unintended) mixes and the results have been quite varied as a function of the materials, weather and other factors.

In general, I ended up with unbonded, soft and/or sticky masses that were a royal PITA. One combination became amazingly brittle and hard as well. I learned to be a bit more careful in setting up mixes and materials (G).

I have his terrible disease called "stickraphobia" so gummy, never curing masses just about send me over the edge (OTOH, young mothers love me because I was kid hands often (G)).

On the whole, I don't trust the bond or mix that I'd get from those kinds of mismatches.
geoff

Luckily I made the mistake while patching gouges, with scrap ply. Just wasn't paying attention (have 3 types of epoxies 5min.. 30min.. 3hr.. and they're all from the same
manufacturer, all bottles look similar). Didn't discover the mistake till about 2 hrs. later thinking I had used the 5 min. stuff. Was gonna wipe it off and try again, but decided to leave it and see, since no one really seems to know what will happen. Well checked it out 24 hrs later now. Seems to be holding, looks to be hard and dry. Like I said it's
just surface patches, so gonna let it go and see if it holds up in the long run. So good so far.

erich

Hey Erich,
Having noticed that no one has attempted to answer your real question regarding what happens from a chemical perspective. I would suggest that you find a large manufacturer on the web and send your specific question to their technical department. They will respond eventually, not like some foreign kit manufacturers.