Glues for Plastruct and Evergreen - Input wanted

I use a slow cure time CA glue and have a spray accelerator can handy if I need immediate bond. The slow dry gives me time to align the pieces where I need them and then lock in place with the accelerator.

If the size of the application permits, I also try to use a brush-on CA glue rather than a drip.

Having a helper on hand to spray the accelerator while you hold the parts together also helps. They also make a brush-on accelerator for better control if the spray might interact with the parts and pieces.

I like MEK but it is deadly if not taken seriously. I buy it in a gallon can and decant it into small containers, and apply it with a small paintbrush. Don't breath the fumes (a small fan going on your workbench is a good idea) but it is cheap and very effective. Other companies repackage it and sell it for a lot more money at the hobby store.

I use MEK with great results.  It fuses together ABS-ABS, Styrene-Styrene, and ABS-Styrene.  I bought a quart bottle from Ace Hardware a few years ago right before all the hardware stores stopped carrying it.  It is still available on Jeff Bezos' little web site or from chemical suppliers.  The big box home centers only seem to carry MEK Substitute (don't get it).

It does evaporate very quickly, so I usually brush on 2 or 3 applications on each part if there is a large area to be glued, then press them together.   Alternatively, you can clamp the parts together and feed MEK into the joint by capillary action.  You don't need to be neat.  I often just slop it onto the joint.  The extra evaporates off.  You just have to be careful not to touch it until it dries (to avoid fingerprints).  

Here is a little test I just did gluing an ABS I-Beam to a styrene sheet.  It is very strong.

Bob

I use Bondene for all Plastruct and Evergreen joints (and most other plastics).

Just use plenty and hold in place for a few seconds. It evaporates fast so you will have to reapply to the joint a few times for large parts such as building walls. You want to see the plastic around the joint melt slightly so the parts are welded together.

Even though the instructions differentiate between bonding similar plastics vs different plastics, I don't see any problem using it for everything (except acrylics).

Jim