Alternative to superglue?

JingoFresh · 02/05/2015, 01:20 AM

I'm trying to superglue a piece plastic to my glass lid.

Superglue works for a bit, but the bond doesn't seem strong enough to put up with the constant saltwater.

Is there something that works better than superglue for bonding plastic to glass that is continually exposed to saltwater?

jrr98002 · 02/05/2015, 01:31 AM

AFAIK as a chemist there really isn't anything that great to bond plastics to glass in that manner, sorry. There may be something out there, but I've never ran across it...maybe someone else here has and will chime in.

toothybugs · 02/05/2015, 06:55 AM

Depends also on what kind of plastic it is. I wouldn't be surprised if you had to use two different glues - coat each surface with one, then bond the two glue surfaces which will probably be much more surface-active.

dkeller_nc · 02/05/2015, 09:40 AM

Quote:

Originally Posted by toothybugs

Depends also on what kind of plastic it is.

Yep. If it's acrylic, 2-part epoxy will form a nice, permanent bond to glass. Polycarbonate also works. If your piece of plastic is polyethylene or polypropylene, you're pretty much out of luck. There are some special formulations of epoxy and cyanoacrylate (superglue) that claim to bond polyethylene and polypropylene, but I've never had much luck with them.

SGT_York · 02/05/2015, 09:41 AM

silicone will keep it stuck but won't provide any structural type strength. It works for internal overflow boxes and to silicone acrylic baffles in a sump.

What exactly are you trying to use the plastic piece for?

FraggledRock · 02/05/2015, 09:48 AM

Gorilla Glue. The Gel version.

I glued pvc fitting threads into a pump last night. left to dry for about 3 hours. strong hold, no leaks.

I used the same Gel glue to seal a hold i made in my DIY skimmer where i sent the air tubing in. solid seal. I even did it half under water =D

JingoFresh · 02/12/2015, 05:51 PM

I'm trying to bond 3M duallock to my lid. It's very similar to velcro, except about 4x stronger and 100% acrylic.

I have gorilla glue in gel form, it didn't help.

I need something that is strong, so that the duallock will keep my lid locked, unless I open it.

This is to keep a pet octopus in, and if I can get the duallock to stick to the glass this would be my preferred solution.

JingoFresh · 02/17/2015, 10:56 PM

So just to conclude, for gluing acrylic to glass there is basically no solution?

A sea K · 02/18/2015, 06:33 AM

Quote:

Originally Posted by JingoFresh

So just to conclude, for gluing acrylic to glass there is basically no solution?

Quote:

Originally Posted by dkeller_nc

Yep. If it's acrylic, 2-part epoxy will form a nice, permanent bond to glass. Polycarbonate also works. If your piece of plastic is polyethylene or polypropylene, you're pretty much out of luck

02/05/2015, 01:20 AM	#1
JingoFresh Registered Member Join Date: Apr 2014 Posts: 447	Alternative to superglue? I'm trying to superglue a piece plastic to my glass lid. Superglue works for a bit, but the bond doesn't seem strong enough to put up with the constant saltwater. Is there something that works better than superglue for bonding plastic to glass that is continually exposed to saltwater?

02/05/2015, 09:48 AM	#6
FraggledRock Registered Member Join Date: Dec 2014 Location: New York, New York Posts: 2,185	Gorilla Glue. The Gel version. I glued pvc fitting threads into a pump last night. left to dry for about 3 hours. strong hold, no leaks. I used the same Gel glue to seal a hold i made in my DIY skimmer where i sent the air tubing in. solid seal. I even did it half under water =D __________________ “For most of history, man has had to fight nature to survive; in this century he is beginning to realize that, in order to survive, he must protect it.”― Jacques-Yves Cousteau MarineBio.org Current Tank Info: 40 Gallon Breeder w/ Bean Animal Overflow 20G Sump, Mixed Reef.

02/05/2015, 01:31 AM	#2
jrr98002 Registered Member Join Date: Jan 2015 Location: Little Rock Posts: 235	AFAIK as a chemist there really isn't anything that great to bond plastics to glass in that manner, sorry. There may be something out there, but I've never ran across it...maybe someone else here has and will chime in.

02/05/2015, 06:55 AM	#3
toothybugs In Memoriam Join Date: Aug 2013 Location: The smallest county in Illinois Posts: 1,986	Depends also on what kind of plastic it is. I wouldn't be surprised if you had to use two different glues - coat each surface with one, then bond the two glue surfaces which will probably be much more surface-active.

02/05/2015, 09:41 AM	#5
SGT_York Registered Member Join Date: Sep 2012 Location: Washington State Posts: 1,746	silicone will keep it stuck but won't provide any structural type strength. It works for internal overflow boxes and to silicone acrylic baffles in a sump. What exactly are you trying to use the plastic piece for?

02/12/2015, 05:51 PM	#7
JingoFresh Registered Member Join Date: Apr 2014 Posts: 447	I'm trying to bond 3M duallock to my lid. It's very similar to velcro, except about 4x stronger and 100% acrylic. I have gorilla glue in gel form, it didn't help. I need something that is strong, so that the duallock will keep my lid locked, unless I open it. This is to keep a pet octopus in, and if I can get the duallock to stick to the glass this would be my preferred solution.

02/17/2015, 10:56 PM	#8
JingoFresh Registered Member Join Date: Apr 2014 Posts: 447	So just to conclude, for gluing acrylic to glass there is basically no solution?