Bob Smith Industries BSI-205 Clear Slow-Cure Epoxy (4.5 oz. Combined) (Fіvе Расk)

I'm not sure what can be said about 2-part half-hour epoxy . . . but I really like the way this one is packaged. The package is one that pops open, so I'm able to keep the bottles in it. Instead of some stupid peel-off liner under the caps (which never seem to work and make a mess), there is a plastic plug in each bottle that comes out without getting a drop on you. The ONLY bad thing (which is 100% my own mistake) is that I cut open each cap at the line that is supposed to hold the cap on, rather than above it . . . so now I have to tape the caps on. But if you aren't as stupid as I am, you'll really like the way this epoxy is set up to use. :)

It worked for my project bonding wood to fiberglass in a boat application caution...I used a disposable plastic cup to mix it in. Set a timer and applied to both services. Attached and clamped the wood without problems. The process took about 10 minutes. I went back to the mixing cup and found while attaching the wood, the remaining epoxy had turned to a hard, hot gel. It appeared to be sending off smoke (I assume steam or some other vapor). The cup was deformed and melted through in one spot. Note: The stick I used to mix it with, sitting on a news paper, still had workable epoxy on it.The product description claims "30" minute working time. That may be true in some applications. It really needs an asterisk pointing to caution about this issue. The only mention I could find of the short cure time was in the small print on the bottle. Stating the larger quantities may cure as fast as 10 minutes.Maybe mixing using a can sitting on a cold pack would extend the time...

Everything is Great about this. Works great, Cures Great... I used this for faux stone making, so while this is great I have two things to note for jewelry makers:1) Takes very well to my homemade alcohol inks, so I would assume it takes well to professional grade - NOTE: It will feel rubbery when demolding, do not fret, straighten it out and let it continue to cure, give it an hour or a few, check it - It should be rock solid.2) The Shthfdhfht Is YELLOW!... so, silly me, I couldn't tell it was yellow, just saw the 30 min and ordered it. But I would be dying it anyway, so it was no problem at all. However if you're looking for clear, Do Not go with this.It does cure in 30mins, maybe even less sometimes.. however it begins curing in about 8-10 so work fast, once it starts getting hot, and it will, you're running out of time.

I used this epoxy for adhering a joint in a maple work bench. The product seems to hold up so far, hard to tell overall with these things where it either works or doesn’t.Wood tip: the guide on the packaging (which I think BSI should include in the product pics) recommended Mid-Cure or Quick-Cure for wood to achieve best performance. I had no idea and I would have purchased Mid-Cure instead of Slow-Cure.Important Mixing Tip: don’t mix in a cup etc and leave it there while applying.I knew this, and I thought I would move fast enough applying the epoxy for it to not happen. I mixed about 1.3 bottles or around 10oz in my first batch. I mixed it thoroughly in a small plastic tub for 3 min and then I sensed a little warmth in the cup. I rushed to spread the epoxy on both surfaces with a brush. I barely got suitable coverage on the second piece when the mixing cup began rapidly cooking. Meaning within 7 min of beginning to mix, the remaining portion of epoxy about 6oz was hard because the heat from the chemical reaction, further sped up the chemical reaction. I knew this but I didn’t think it would cook itself so quick. This only happened to the material that was waiting in the mixing up to be applied. The initially applied epoxy was fine and stayed maliable for a sufficiently long time.Take away: spread the epoxy out I’m thinner pools if you have a long time to apply it or mix and apply in multiple batches.

Five minute epoxy only has about 2 minutes working time, starting from when you start mixing it. This just isn't enough time for anything but small jobs, or where you can just quickly smear on a blob and push the parts together.This 30 minute epoxy gives me about 10 to 15 minutes working time, enough to carefully but quickly spread it around the contact areas of a somewhat more complex object, put the two halves together and clamp, and wipe up the squeeze-out.If the parts have any tendency at all to come apart, plan on leaving them clamped for 4 to 6 hours. I found that if I waited an hour and took the clamps off, the epoxy was not hardened enough to prevent parts from springing apart slowly if they had any tendency to separate. This is not unexpected, it does say "Handle parts in 8 hours" on the package.

This is a slow drying epoxy that holds up at higher temperatures. It takes about 20 minutes under ideal conditions for it to set and then overnight to fully cure. So, plan to use it on something you can clamp unless you want to stand around for at least 20 minutes. The gain for the slow cure is the ability to re-position the two parts before the epoxy sets and higher temperature resistance once cured. Go to the manufacturer's website to learn about the range of materials, environments and temperatures this epoxy will tolerate when cured.

I build U.S. Civil War camp scene dioramas as both a hobby and part-time business. The dioramas have been on display at Civil War shows in Gettysburg, PA and at local museums in the Washington DC metro area. I'm very familiar with various types of cements and epoxies. For my work, this epoxy is far superior to anything that can be purchased in a local hardware or big box store. You can squeeze very small amounts out of each tube without wasting epoxy as you would with most other brands. So if you just need to repair a piece of jewelry or small item it is fantastic. Also, the applicators stay clean after continuous use. If you need epoxy for a large surface, this may not be your best bet. But it is worth having it around for the occasional small fix.