Liquid glue - am I doing something wrong or what?

Sluis Van Shipyards · Post by **Sluis Van Shipyards** » Sun May 18, 2008 9:05 pm

I got some Plastruct Bondene and I stick the pieces together and run some of the glue along the seam. It will look glued then it will eventually come apart. It looks like it's only glueing the edge I apply the glue to with a little on the sides. Am I doing something wrong? The glue is brand new.

Umi_Ryuzuki · Post by **Umi_Ryuzuki** » Sun May 18, 2008 9:34 pm

Cant imagine you're doing anything wrong...
Unless you have some odd plastics that you are trying to scrap together.

Bondene should be good for ABS and Styrene...

DX-SFX · Post by **DX-SFX** » Mon May 19, 2008 5:34 am

Plastruct do two solvents. One is water thin and usually comes in a can, the other usually comes in a bottle and is a tad thicker, best described as having the consistency of milk (but still clear). The former tends to penetrate joints better. Sounds like the glue isn't penetrating the joint. Also Plastruct's smaller size pipes are made from butyrate which doesn't solvent glue quite so easily although the bigger size grey tube are genuine ABS.

You know how a knife cut in plastic raises a little ridge either side of the cut line? Try putting some little knife snicks in the edge of your parts to raise them slightly and leave a gap for the glue to go into. Leave it a few seconds and then squeeeze them together. The solvent action will dissolve the high spots and restore the fit.

Sluis Van Shipyards · Post by **Sluis Van Shipyards** » Mon May 19, 2008 9:28 pm

Okay I'll try that. I was gluing styrene to styrene so I wasn't trying to bond two different types of plastics.