Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Carbon Primer

Old 07-11-19, 02:27 AM
  #1  
steve919
Newbie
Thread Starter
 
Join Date: Jul 2019
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Carbon Primer

I have a Cannodale Carbon mountain bike frame I am going to respray, can anybody recommend a suitable primer?

Thanks.
steve919 is offline  
Old 07-11-19, 04:29 AM
  #2  
mrt2you
Senior Member
 
Join Date: Mar 2010
Location: new berlin wi
Posts: 235

Bikes: trek 720 multitrack hybred, 92 trek 2300, 2010 specialized roubaix, 2014 specialized roubaix

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 15 Times in 12 Posts
carbon fiber construction is basically the same as fiberglass mat.carbon fibers held together by resin. the difference is the strength and weight of the fibers being held together by the resin.
any primer that works on fiberglass will work on carbon fiber.
JUST DON'T BREATH THE CARBON FIBER DUST. it can be hazardous to your health. vacuum the powder up, don't blow it away.
the outer surfaces are resin so a light sand will not be a hazard problem.
mrt2you is offline  
Old 07-11-19, 06:08 AM
  #3  
TimothyH
- Soli Deo Gloria -
 
Join Date: Aug 2015
Location: Northwest Georgia
Posts: 14,782

Bikes: 2018 Rodriguez Custom Fixed Gear, 2017 Niner RLT 9 RDO, 2015 Bianchi Pista, 2002 Fuji Robaix

Mentioned: 235 Post(s)
Tagged: 0 Thread(s)
Quoted: 6837 Post(s)
Liked 702 Times in 447 Posts
Originally Posted by mrt2you View Post
JUST DON'T BREATH THE CARBON FIBER DUST.
There should be no carbon fiber dust.

The only dust should be from sanding resin.

If the part is sanded to the point where carbon fibers are being turned into dust then the part is ruined.


-Tim-
TimothyH is offline  
Likes For TimothyH:
Old 07-12-19, 05:50 AM
  #4  
berner
Senior Member
 
Join Date: May 2010
Location: Bristol, R. I.
Posts: 4,340

Bikes: Specialized Secteur, old Peugeot

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
Liked 490 Times in 296 Posts
The best primer is one that is compatible with the carbon composite material of the bike as well as the paint that will be used. Hit google to find out about this.
berner is offline  
Old 07-12-19, 07:44 AM
  #5  
steve919
Newbie
Thread Starter
 
Join Date: Jul 2019
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks. Will a fiberglass primer do any damage to the carbon layer if I accidentally sand through the gel coat? Iíve been told itís very easy to sand through it and as the paint layer is black it may be even easier.
steve919 is offline  
Old 07-12-19, 08:00 AM
  #6  
DrIsotope
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 4900 Post(s)
Liked 1,707 Times in 949 Posts
On any carbon frame, you shouldn't need to be sanding with any aggressive papers-- you're only trying to put a tooth in the surface for the primer to adhere to. I can't see using anything rougher than 400 grit wet, really. So long as the surface was free of defects, I might just do 400 only and then a good clean/prep.

As someone else mentioned, you're really painting epoxy, and most any primers and paints will bond. I'm guessing this is a rattlecan job, as if this were an HVLP job you'd be using a catalyzed urethane or polyester primer, and appropriate top coat. So grab some Rustoleum.
__________________
DrIsotope is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Panza
Bicycle Mechanics
23
08-14-18 10:10 AM
jamawani
Touring
77
05-19-17 05:41 AM
nycphotography
Road Cycling
19
11-07-16 06:53 AM
abstractform20
Road Cycling
0
01-18-12 01:10 PM
avidcyclist83
Road Cycling
18
03-02-11 09:06 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.