Sorry for slow updates here. It's been busy at the ranch. I will get back to this and continue it in a month or so...
anyway, I heard from Curtis Seeback, owner of Original Cactus Blank(TM) and MesquiteMan's Cactus Juice. (nice guy btw)
So I don't mess up what he says, I'll quote
"... Cactus Juice is NOT an MMA. It does not contain any methyl methacrylate. It is a blend of various methacrylate esters. There is a bid difference in this. Methyl methacrylate is the bad chemical that is very flammable and dangerous to work with. Cactus Juice is NOT flammable and is consider non-hazardous. Typical safety measures for working with chemicals in general should be followed such as safety glasses and nitrile gloves when in direct contact but otherwise, it is actually quite safe. It does NOT absorb through the skin as someone on that thread stated. As a matter of fact, it is so safe that I have written permission from the USPS to ship it via Priority Mail as it has no shipping restrictions"
That to me is impressive as the results of using the stuff were quite good. He sent a copy of his MSDS as proof.
Further, he provides some additional benefit of his experience...which we appreciate and what this thread is all about...
"...On your comments about some of the various resin you tried being rubbery...this is a prime indicator of contamination. Contamination can come from using the wrong types of dyes, other chemicals, or moisture form the wood. The foaming you mentioned is absolutely caused by too much moisture in the wood. The moisture content needs to be as low as possible and for the very best results, oven dry (0%) is best. To get there, try putting your blanks in your oven at 150-200° for 12-24 hours prior to stabilizing. This will get them to oven dry in most cases and will eliminate the foaming and help get even more Cactus Juice in the blank....." (the bold font I added to emphasis on a best practice around getting the wood dry as possible before putting it in the juice)
Curtis, thanks for your email. Welcome to KnifeDogs..From what I have seen and personally tested, I think your chemical is the real deal and works well. It's great to see that it is safer than many if not most out there.