What glue can I use to stick silicone to plastic?

Plastic is easy, lots of stuff sticks to plastic, but the only thing that seems to stick to silicone is more silicone. Hot glue, super glue, Elmer's glue, Gorilla glue, and liquid steel epoxy all fail. Any suggestions? Maybe something marine related? (Background: I used some left over silicone molding compound to make a comfy handle, but it doesn't want to stay on.)

Silicone can be glued, but you often need a special "surface activator" chemical to prepare the silicone and the substrate to be bonded. People like Permabond and Loctite can do them.

Any product names for us?

"Silpoxy" is one,-Silicone-an/c11_1189/index.html?osCsid=rroncsv8o31mujcl356i421do5

jubilee0072 years ago
Our products can be used to stick silicone to plastic, the theory is the same with the first repler, activity its surface first, and than use instant glue can stick them together.
What are your products?
labomed4 years ago
try using E6000 glue. However, I am looking for a glue that is electrically conductive and glues Plastic to silicone
Hello dear, we have that conductive coating which you need.
Satweavers2 years ago
I just glued a silicone rubber pad back onto a plastic headphone using this product that's available on line: Dow Corning 3145 RTV MIL-A 46146 adhesive/sealant. I cleaned all surfaces up with denatured alcohol, wiped them down. When the stuff cures, it's the most dense, toughest silicone I've seen. Has a really aggressive bond. Durometer 45.6 Shore A. Tensile strength 864 psi. Unprimed adhesion - lap shear to aluminum 1900 psi.
Talo1993 years ago
Try this:,-Silicone-an/c11_1189/index.html?osCsid=rroncsv8o31mujcl356i421do5

Works great!
Fiction4 years ago
While this is most likely a dead thread, other sources on the web say that you can glue to silicone using 3M yellow weatherstripping and gasket adhesive.

I am posting this to say that it does not work. It peels off effortlessly. Don't waste your time.
Fiction Fiction4 years ago
As a follow up, Devcon Silicone Adhesive works fantastically. I have the verson with 310 PSI bond strength, and though I was looking for the 700 PSI version, 30 minutes of cure have created a bond stronger than than the 1/4" silicone I was gluing.

I am gluing silicone foam to an insole... probably a nylon-based fabric. No sanding or prep was given to the silicone before gluing, other than it being visually clean.
seandogue5 years ago
Dumb question... Have you tried silicone sealant as an adhesive?
Grathio (author)  seandogue5 years ago
Whoops, left that off my list. Yes I tried it but it pulled away from the plastic pretty easily.
lol...seemed an obvious choice, but ... I think Steve has made a good observation/suggestion...