Superglue issues

I think my problem is just applying too much glue. Don't really know what else it could be. I need to stop with the 'if a little is good, then a lot is better' way of thinking.

Thanks for the responses.

Like other Greg, I'm stumped too.

I hate using CA and do so only as an absolute last resort. That said, it should not be just not working at all as you describe.

When I do use it, about the only thing I use is Bob Smith CA gel.

This is beyond the scope of your question, but my go-to adhesive for PE is Gator's Grip Thin Blend. When it doesn't work, I'll go to CA. But it sounds like maybe you've tried this too.

I have to admit I'm stumped.

I almost never use accelerators or 'gel' types...usually just 'grocery store' Super Glue...and your description sounds pretty much the same as the way I've always used it. That having been said, I've rarely had the difficulties you describe. I always try to use the absolute minimum amount -- at least for the initial bond -- then go back and 'reinforce' if necessary.

The only thing I can think to ask is whether you work in a low-humidity environment, since CA needs airborne moisture to set and cure.

Since you said PE is your main use, do you clean your PE with alcohol or something similar first? It sounds almost like you've got oil or something on the parts. (Apologies if it's stating the bleeding obvious, but I'm struggling here.)

The 'not taking hold' part of your original description seems odd to me. I would not suggest applying the glue to both surfaces, as that would offer no real advantage. Those who use accelerators regularly sometimes suggest applying the glue to one surface and the accelerator to the other -- might be worth trying, if you haven't already done so.

The 'good' news is that that applicator shouldn't make any difference, as long as it's not putting on too large a quantity.

Doesn't seem like much help...but I've got no better ideas. Maybe I've missed something obvious that somebody else will pick up on.

which brand out of curiousity?  I use Loctite superglue on small plastic parts, generally just applied to one piece with no problems.  Straight from the bottle usually.  If i have to get in to a small spot, i use the tip of a toothpick to apply.  Ive used it on PE parts too, just applied to one part and it works great.

I use it only for PE, or other non-porous items. As little as possible, but probably still too much. For small pieces, I generally just use enough to cover the attachment point. For larger ones, I use a little more, but on both sides. And of course, trying to put on enough to keep it from drying before I get it to the model, and enough to get it to stick.

I've used super thin liquid to thick gel. I've used pins, stretched sprue, brushes and dedicated, specialized tools to apply it. I've used many brands and change them out from time to time. Even tried Gator Glue, and as much as many love it, I've never gotten this stuff to work.

Perhaps if you gave a short run-down of how you use it, it might be easier to figure out where the problem lies.

As a general rule of thumb, people try to use too much of it -- a quantity about the same as a modeling or household cement -- which actually slows the setting and often weakens the bond itself.

The other major questions would be whether you're using it on porous or non-porous surfaces, and what sort of size bonding surfaces you're working with.

It's really useful stuff, but it's not the 'miracle' fix the old TV commercials would have you believe. Like any other product, it has its weaknesses and limitations.

Let us know.