Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sat Jul 19, 2025 7:58 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 17 posts ] 
Author Message
 Post subject:
PostPosted: Mon Dec 11, 2006 8:29 am 
Offline
Walnut
Walnut

Joined: Wed Sep 20, 2006 1:14 am
Posts: 14
Location: United States
For a release agent on molds, clamps etc., mix 100% silicone clear caulk and naptha until it is about the consistancy of house paint or a little thinner. Paint this mixture onto whatever you don't want glue to stick to. It will dry like a thin coat of varnish and nothing will stick to it.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 8:36 am 
Offline
Contributing Member
Contributing Member

Joined: Mon Dec 27, 2004 11:25 pm
Posts: 7207
Location: United States
Umm...ok, here's my issue with that.

Silicone is nasty stuff, and does even nastier stuff to wood. It can wreak havoc with your finish if it gets on the wood. I use silicone as little as possible in my shop. The only thing I use it for is sealing vacuum presses. This weekend I sealed one up, and the silicone never set. Yep, still a sticky liquid after 48 hours still. Adding naptha to it doesn't sound like a good thing either.

I heartily recommend rethinking doing this...

_________________
"I want to know what kind of pickups Vince Gill uses in his Tele, because if I had those, as good of a player as I am, I'm sure I could make it sound like that.
Only badly."


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 8:53 am 
Offline
Old Growth Brazilian
Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States
Don that is just what I was thinking. you don't know the trouble I had with a tops finish due to microscopic contamination of Silicone. I had rather shoot my toe off to trim the nail then get any form of silicone any where near the guitar. now I do use it to calk the truss rod slot. but I am so very carfull it is unreal.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 9:03 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sat Jan 08, 2005 1:26 am
Posts: 2558
Location: United States
Daddy-o. At the risk of sounding like we're ganging up on you, Don and Michael are quite right. Silicone and finish don't mix. It will fish-eye your finish and you'll be fighting it forever. If you don't believe me/us, grab a can of paint and try to cover the silicone you put on the mold. If I were you, I'd use something like UHMW as a release agent. Pwoolson39062.7281828704


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 9:20 am 
Offline
Old Growth Brazilian
Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States
Shellac will stick to almost anything but even shellac will not cover and seal out silicone. It just keeps on penetrating through. You probably don't want to here my opinon of what you should do with the mold you did this too. but the truth is this can cause you big problems.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 3:21 pm 
Offline
Koa
Koa

Joined: Wed Jan 05, 2005 10:43 pm
Posts: 1124
Location: Australia
First name: Paul
Last Name: Burns
City: Forster
State: NSW
Zip/Postal Code: 2428
Country: Australia
Focus: Build
Status: Amateur
I was reading somewhere that there's an additive used in the auto paint trade that contains silicone. You mix it in with the paint before spraying. It's the only way to get paint to stick to a surface that's contaminated with silicone. Something about matching the surface tension.

Of course then you'd contaminate your shop and/or ruin a spray gun. But it works apparently.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 4:24 pm 
Offline
Koa
Koa

Joined: Thu Feb 17, 2005 3:38 pm
Posts: 1542
Location: United States
ANy finish will do the trick. Shellac or lacquer.


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 4:30 pm 
Offline
Cocobolo
Cocobolo

Joined: Wed Aug 02, 2006 7:31 am
Posts: 174
Location: Leucadia, CA
First name: Dean
Last Name: Bayles
City: Leucadia
State: CA
Country: USA
Focus: Build
Status: Amateur
If you do get contaminated with silicon you can save the day if your'e shooting lacquer by adding Smoothy, available at better paint stores.

Dean

_________________
Dean


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 5:35 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Aug 18, 2005 2:21 am
Posts: 2924
Location: Changes when ever I move..Australia
Focus: Build
Status: Amateur
[QUOTE=PaulB] I was reading somewhere that there's an additive used in the auto paint trade that contains silicone. You mix it in with the paint before spraying. It's the only way to get paint to stick to a surface that's contaminated with silicone. Something about matching the surface tension.

Of course then you'd contaminate your shop and/or ruin a spray gun. But it works apparently.[/QUOTE]

What you say about the silicone additive is true Paul and as you suggest, once you shot it, you got it, everywhere.

Cheers

Kim


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 5:58 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu May 12, 2005 5:46 am
Posts: 2996
Location: United States
I can't agree enough with every one who is warning about silicone.
You can get teflon release agents pretty readily.

_________________
Jim Watts
http://jameswattsguitars.com


Top
 Profile  
 
 Post subject:
PostPosted: Mon Dec 11, 2006 7:33 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Sun Dec 25, 2005 7:58 pm
Posts: 2946
Location: United States
Multiple Carnuba waxings work well too!

      Even trichloroethylene won't get that silicone crap out and trichlor will pull the oil out of your skin!

_________________
Billy Dean Thomas
Covina, CA

"Multi famam, conscientiam, pauci verentur."
(Many fear their reputation, few their conscience)


Top
 Profile  
 
 Post subject:
PostPosted: Tue Dec 12, 2006 5:30 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Aug 19, 2005 4:02 am
Posts: 3272
Location: The Woodlands, Texas
First name: Barry
Last Name: Daniels
Trichloroethylene is very carcinogenic. I would never have that stuff in my shop. There are a lot of suitable substitutes for TCE.


Top
 Profile  
 
 Post subject:
PostPosted: Tue Dec 12, 2006 6:17 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Sun Dec 25, 2005 7:58 pm
Posts: 2946
Location: United States
[quote]Trichloroethylene is very carcinogenic[/quote]

Yea it is! But name one that's better! I don't recommend it at all, but it's clearly the most powerful oil based solvent I've come across, and it still doesn't touch silicone!

_________________
Billy Dean Thomas
Covina, CA

"Multi famam, conscientiam, pauci verentur."
(Many fear their reputation, few their conscience)


Top
 Profile  
 
 Post subject:
PostPosted: Tue Dec 12, 2006 9:15 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Aug 19, 2005 4:02 am
Posts: 3272
Location: The Woodlands, Texas
First name: Barry
Last Name: Daniels
Naptha, mineral spirits, Bestine, and acetone are all effective cleaning solvents and they are much less toxic or mutagenic than TCE. They don't touch silicone either <g>

There is a good reason why TCE has been largely replaced with other solvents in general industry.BarryDaniels39063.7205439815


Top
 Profile  
 
 Post subject:
PostPosted: Tue Dec 12, 2006 10:30 am 
Offline
Contributing Member
Contributing Member

Joined: Mon Dec 27, 2004 11:25 pm
Posts: 7207
Location: United States
Lacquer thinner seems to work pretty good for me...

_________________
"I want to know what kind of pickups Vince Gill uses in his Tele, because if I had those, as good of a player as I am, I'm sure I could make it sound like that.
Only badly."


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com