best glue for plastic

[kentb]

JB weld.

Sand the surface and then a thin layer of JB weld.

Kent

[Mike S]

Can you contact the manufactures and see what they recommend???

At least see if you can get the kind of material, then go to various glue/adhesive companies and ask for something to bond the stuff.

[Wayne Gillispie]

and check out www.theengineerguy.com in Atlanta Ga. I just received my Weld-On 45 for my windows. I am not using 10 as it is too thin/messy. Best prices I could find and quick service.

You can also try your local auto body/paint store. I found several different high quality plastic adhesives by 3M and SEM but none were "structural". It sounds like you do not need structural adhesive like I did.

West Systems is really made for wood or fiberglass. It does not have great bond strength with plastics or aluminum. Tested that already. If you need to bond to aluminum it should be sanded, phosphoric acid etched, and a chromic acid conversion coating applied first like on our RV-10 top fwd fuse skin- winshield bond.

[Neal@F14]

Plastic GPS mounts are probably some type of ABS/PVC "alloy" blend. I think that's what the Airgizmos GPS docks are made out of.

I needed to glue up some cracks in the "Royalite" (ABS) plastic instrument panel overlays for my Cherokee, and used ABS plumbers' cement... a solvent-based glue that basically melts the ABS plastic back together chemically. That cement is black in color and it worked very well on my panel overlays. The black color didn't exactly match the panel overlays very well, but a rattle-can of satin-finish Krylon plastic paint solved that problem.

[mike newall]

Sorry to disappoint the last post - West will almost glue air to water !!!

I have used West to glue wood, metal, glass, plastics of all types, composites etc etc.

The secret is scuff it up well, thoroughly degrease with panel wipe or thinners - add a little flox to give it body and let the epoxy do the rest.

My two best 'bodges' were on a polypropylene wheelbarrow that some horsey female had burned a hole in and my lawn tractor hood - again in a very difficult plastic.

Both were repaired 2 or 3 years ago with West, they have been left outside to sun and elements and still stick like **** to a blanket.......

My favourite trick with left over West is to thicken with a little flox and stick a penny to the sidewalk.

They usually last about a year before someone finally gets them off

[prkaye]

A bit of research has revealed a type of product called "plastic weld" which appears to be a two-part epoxy like JB-Weld, but that also contains some ingredient to chemically etch the plastic. Any pireps here on that stuff?

[Wayne Gillispie]

but it is still a mechanical bond and not a chemical bond. It really all depends on what kind of strength one is looking for.

[prkaye]

Plastic GPS mounts are probably some type of ABS/PVC "alloy" blend

Maybe i should try an ABS cement first. If this works, it would be a chemical bond, right? I would imagine, because of this, i would either get an incredibly strong bond or a very weak one and it would be easy to tell if it worked?

[turbo]

my old stand by is marine tex. a 2 part boat product it hardens like steel. it can be drilled and tapped. in special cases were more strength is needed across a joint i embed some small brads or nails into the stuff to help the area. we never left port without it back in the days of boating. sounds like you need a jury rig. good luck.

[az_gila]

Originally Posted by prkaye

A bit of research has revealed a type of product called "plastic weld" which appears to be a two-part epoxy like JB-Weld, but that also contains some ingredient to chemically etch the plastic. Any pireps here on that stuff?

Yes, I've used it on many plastic parts, including aircraft interior ABS parts and found it to work well.

It can usually be found in the Ace or Home Depot aviation aisles in a "double syringe" form....