5200, 4200 and acrylic

[2112]

Fountain uses a black caulk around their acrylic windshields. I always assumed it was 5200 since it is such a ***** to get off.

I read the product description of 3M 5200 and lesser strength 4200 and they both say incompatible with acrylic. :confused:

Can someone out there enlighten me on what the factory uses and what 3M means by incompatible?

Thanks :sifone:

[Airpacker]

the curing agent in the urathane sealer will attack the acrylic and literally melt it.

[2112]

the curing agent in the urathane sealer will attack the acrylic and literally melt it.

Do you know what Fountain used then?

[Chris]

There's a product manufactured by Cotronics called Duralco 4538. It's a hybrid- has the properties of both a flexible silicone and an epoxy. Is certified to bond most plastics including polycarbonates. www.cotronics.com

[ROGUE]

I am not sure about acrylics but "Life Seal" has always worked good for me on plastics and most other things. Its an interested cross between silicone. I found a couple sites that say its fine on lexan/acrylics.

[2112]

There's a product manufactured by Cotronics called Duralco 4538. It's a hybrid- has the properties of both a flexible silicone and an epoxy. Is certified to bond most plastics including polycarbonates. www.cotronics.com


Definitely flexible. :D I did not see black though.

[2112]

I am not sure about acrylics but "Life Seal" has always worked good for me on plastics and most other things. Its an interested cross between silicone. I found a couple sites that say its fine on lexan/acrylics.

It did not list acrylic as a problem. Is 1/12 gallon the same as a caulking gun tube? :confused:
.

[2112]

I found a case of Swiss made Sikaflex 521 UV (resistant) that I used on a non marine project in my shop. It has no solvents, VOCs or isocyanates. I called the shop that made cut my new acrylic for me and they OK'd it.

I have extra if anyone needs some, Send me a P/M and I get it to you.

Thanks for your help. :USA: