West SystemG/flex Epoxy (2- 4oz)

The industry standard in rebuilding wood Boats. This type of epoxy has just the slightest ability to flex compared to the rigidity of most epoxies. This is not a flex visible to the eye. But with wood Boats we like a little give. And the squeeze bottles work great. No measuring spoons required. No cleaning up of the measuring spoons required. No waste of product on the measuring spoons. This companies back up literature is brilliant and free -- again the industry standard. The back up information is the best I have ever seen in my life, so if you want to learn!

Used for handling 6 knives so far, including long-handled twca cam. Great results with mild learning curve. Wet consistency is on thick side of honey, but will settle and sink a bit. So far it appears to be very strong, including setting a 3” sloyd blade in maple despite having a short ~1” tang which has held on through peeling though seasoned hardwood. Hasn’t been too hard to mask off wood parts and peel away excess without destroying unmasked sections of set epoxy.

Used on a Hobi canoe, worked great

All three of the A/C covers on my 5th wheel trailer were cracking on top due to UV deterioration. They cost a small fortune so I thought I'd try to repair them to get a few more years out of them. I read on a forum online that many people had good results with G/flex. It was easy to mix and apply and did a good job bonding the fiberglass cloth I used to reinforce inside and outside of the A/C covers. I'd include a picture but it wasn't a pretty job. That's OK because it reinforces how easy it is to get good results, even from an amateur like me. Nobody can see the top of the A/C covers anyway. If you need to bond some plastic, this is the stuff to use.

My experience with this stuff so far is great! I have used it to bond thick (1/2") PVC plate to PVC plate and PVC plate to PVC foam board, it seems to really wet the plastic and create a decently strong bond. So nice to not have to use a 20 second working time plastic welding cement anymore! I follow the West System surface prep guidelines - lightly sand the bonding area and clean with ethanol. I have not tried flame oxidation yet but for what I'm doing I don't think it's necessary. I can peel it off the PVC plate with a razor blade but it resists enough that I think it is making a pretty good structural bond when there is sufficient bond area.I did some bond tests with glass to metal to see if this would be good for optical element bonding. I made up some pairs of 25mm diameter 12mm thick plate glass and 50mm diameter 12mm thick pyrex bonded to 3/8" MIC-6 aluminum with 0.015" and 0.03" bond line thickness. I subjected these to temperatures ranging from -7F to 180F many times. There were no hints of any bond failure. The 50mm Pyrex with thin bond line is a particularly harsh combination considering the large CTE delta. Finally, I performed a lateral shear push-off test on one of the Pyrex samples, and the glass failed before the bond line, so Yeah, this stuff is great for technical bonding.It entrains a lot of air with mixing, especially with fillers, so you might want to consider using a vacuum to de-air.I measured Shore D 70 with my old out of cal durometer at room temp on a 4mm thick section. - like a medium soft plastic. At -7F from my freezer it measured D 80. In thin sections (5mm - 1mm) it's flexible and bendy - it won't break,

Excellent epoxy for niche projects like building custom knives which I engage in frequently.No color, very clear, will take expoxy stain, waterproof, Food safe, a little thinner than I would like.Drying time is fairly long but the tensile strength is really good.My one star deduction is for the price and the containers.This product has gotten very expensive and the containers are really annoying to dispense accurate proportions of the resin and epoxy.A large twin syringe with a push handle would solve the mixing issue. The price increase would be warranted with an improved dispensing system

I used this epoxy to repair a delaminated XC ski. It was reasonably easy to mix and use, and seems tough and flexible. I appreciate the long working time, although it does mean that you'll be weighting or clamping your work piece. It was straightforward to trim and sand the overflow, easier than I thought it would be. After that success, I also used it to repair the broken headband on my son's large, over-the-ear headphones. I wasn't able to get too much epoxy into the broken area, so I wasn't sure if it would hold. But after several weeks of heavy use it's still holding well. So I have to say that this expoxy has exceeded my expectations.I just wish the expoxy was available in smaller bottles... I don't use it often, and usually only a small amount (drops) at a time. So the 4oz bottles are overkill for me. At least they do seem to seal well.