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  #1  
Old 02-16-2009, 12:50 PM
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Default How to use ca glue!

Everyone always asks me after they've had a problem with CA glue... "How in the hell do I use this stuff??!"

Cyanoacrylate Glue (CA) - It's just basically super glue. It comes in different colors, thicknesses, etc, but at it's root form, it's still just super glue.

I've used a LOT of different types of CA. Some are absolutely amazing, while others just won't work. It just depends on what you're trying to accomplish.

For building subwoofers, most CA glue is just not worthy of the task. I would highly advise agains just running out to the store and grabbing some super glue tubes, or even the sometimes awful junk at hobby shops. If you're not sure that you have the right glue, don't use it! You'll hate to buy another recone kit because the glue didn't hold up.

I'll try to explain how I do it for you. This is NOT meant to teach you how to build a subwoofer, just how to use the glue that I have become accustomed to when assembling one, or parts of it.

There are a ton of other ways to use CA... this is how to do it when fixing a subwoofer!!


Here's how to use CA Glue and Activator:

1: Make sure to have a clean surface (use acetone or sand the area)

This is a very important thing. If there is dirt or paint on the surface, even CA won't stick.

2: Apply a bead of CA



There is no need to go globbing glue all over the place. Try to use a continuous bead of glue. The more glue you smear all around, the more you get all over yourself (and your precious subwoofer).

3: Place the object to be glued into the adhesive.

DONT USE ACTIVATOR YET! - GAH... Everyone seems to mess up here.

Just place the object onto the adhesive. Slightly moving (or wiggling) the object will help to spread the adhesive around and into the surface of the glued object.


4: Apply activator



This is the absolute most important part of being able to properly use CA. Some people just pour the activator on. When you do this, the activator just completely attacks your glue. This is where discoloring and blooming comes from. Remember that we're dealing with an albeit small, but very violent chemical reaction.

The thing to do with CA (or at least mine) is to very lightly use the activator, sometimes 2-4 times, on the glue bead. We're trying to seal the outside of the bead. We want it to keep its shape and color, but still be able to properly cure. It takes CA a good 24-48 hrs to FULLY cure.

When too much is applied, the activator, instead of hardening the surface of the bead, actually penetrates too far into the bead. Once the outer layer begins to harden up, all of these FUMES from the chemical reaction... they bacially build up enough pressure inside of the glue to crack the outer layer. Afterwards, foul fumes come bursting out, discoloring the clue and causing a bubbling inferno of CA glue to be left.

When using the activator, SPRAY IT. Either get yourself a small pump bottle, or better yet, a re-usable aerosol can.


Spray very lightly, allowing the exterior of the bead to dry. I usually blow on it to help it dry quickly. It only takes the activator 2-3 seconds to evaporate. Repeat this process a couple of times until the glue is absolutely dry to the touch on the outside.

5: Dry

Always wait at least 24hrs before using the assembled pieces (unless you've got a show )



Here's a photo of a CA bead on the back of a spider/coil connection. This glue is dry to the touch, although wet inside. This is what you want it to look like just after spraying.


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Last edited by TeamPSI; 02-16-2009 at 12:55 PM.
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Old 02-16-2009, 12:58 PM
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a question about that
if i put the recone on the clue, isn't the spider or the surround coverin all the clue? so just spray the activator at the top of it?
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Old 02-16-2009, 01:03 PM
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what's the best way to apply activator to spider landing?
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Old 02-16-2009, 01:06 PM
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Thanx for the toot and re-cone for my re mt18


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Old 02-16-2009, 01:15 PM
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The glue will soak into the spider. Once activator is applied, there will be small hardened CA glue all inbetween the material of the spider.

That's one of the things that we count on as manufacturers.
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Last edited by TeamPSI; 08-29-2009 at 12:25 PM.
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Old 02-16-2009, 01:19 PM
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ooh that explains it
thanks realy much

great tutorial
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  #7  
Old 02-19-2009, 07:35 AM
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Thanks for the tutorial. I had no idea what goes into doing a recone, thanks.
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Old 02-19-2009, 07:46 PM
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Quote:
Originally Posted by Patrick Simmons View Post
Thanks for the tutorial. I had no idea what goes into doing a recone, thanks.
I remember when everyone was interested when i did my subs int he fall. Its not to complex just take your time and double check before gluing and misting accelerator. Also when reconing take the time to clean out the gap real well. there are always little presents waiting for you down there. lol
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Old 03-02-2009, 07:04 AM
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nice thread, even i learned something

where can i find one of those useful reusable aerosol cans?
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Old 03-02-2009, 07:13 AM
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Good tutorial, and yes a small but violent reaction is exacly correct. If anyone has ever just toyed with CA, they have seen how hot it gets.


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nice thread, even i learned something

where can i find one of those useful reusable aerosol cans?
http://www.harborfreight.com/cpi/cta...temnumber=1102

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