Paint & Body Work Custom Painting | Panel Repairs & Replacement

Fixing plastic cracks

Thread Tools
 
Search this Thread
 
Old Mar 10, 2012 | 03:57 PM
  #1  
2QuikTA's Avatar
Thread Starter
TECH Fanatic
 
Joined: Nov 2001
Posts: 1,100
Likes: 2
From: IL
Default Fixing plastic cracks

Getting ready to paint my lid and lower airbox. The airbox has a couple cracks, how do I go about fixing them?
Reply
Old Mar 10, 2012 | 04:26 PM
  #2  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

find out the kind of plastic it is and get the PROPER adhesive
Reply
Old Mar 10, 2012 | 07:27 PM
  #3  
JOHNNY59's Avatar
11 Second Club
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (398)
 
Joined: Jul 2009
Posts: 1,280
Likes: 35
Default

stuff is called plastic welder and is a two part adhesive. can be bought anywhere.this is the best adhesive to use!
Reply
Old Mar 10, 2012 | 09:13 PM
  #4  
2QuikTA's Avatar
Thread Starter
TECH Fanatic
 
Joined: Nov 2001
Posts: 1,100
Likes: 2
From: IL
Default

Anybody know what kind of plastic the lower airbox is?
Reply
Old Mar 11, 2012 | 07:58 AM
  #5  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

http://www.urethanesupply.com/howtorepair.php

read up.........
Reply
Old Mar 11, 2012 | 02:03 PM
  #6  
JOHNNY59's Avatar
11 Second Club
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (398)
 
Joined: Jul 2009
Posts: 1,280
Likes: 35
Default

just use the plastic welder on any plastic. rough up the work area,use a adhesion promoter and your go to go!
Reply
Old Mar 11, 2012 | 02:03 PM
  #7  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

^^^

did not read.....
Reply
Old Mar 11, 2012 | 03:09 PM
  #8  
2QuikTA's Avatar
Thread Starter
TECH Fanatic
 
Joined: Nov 2001
Posts: 1,100
Likes: 2
From: IL
Default

Originally Posted by sjsingle1
That's nice, but no help since I don't know exactly what kind of plastic it is.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Mar 12, 2012 | 12:17 PM
  #9  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

^^ the guide tells you what to look for to identify what kind of plastic it is
Reply
Old Mar 13, 2012 | 06:46 PM
  #10  
JOHNNY59's Avatar
11 Second Club
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (398)
 
Joined: Jul 2009
Posts: 1,280
Likes: 35
Default

I used it on many different kinds of plasic! just use the adhesion promoter! what do you have to lose!
Reply
Old Mar 13, 2012 | 09:08 PM
  #11  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,755
Likes: 292
From: Fort Worth TX
Default

trouble is not all plastic is the same......used some 2 part stuff from wal mart on my headlight housing and it worked great.......same stuff on my door panel just flaked off.......proper glue for the proper plastic.....nuff sed
Reply
Old Mar 14, 2012 | 01:46 AM
  #12  
2QuikTA's Avatar
Thread Starter
TECH Fanatic
 
Joined: Nov 2001
Posts: 1,100
Likes: 2
From: IL
Default

is the plastic weld sandable?
Reply
Old Mar 15, 2012 | 02:01 AM
  #13  
JOHNNY59's Avatar
11 Second Club
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (398)
 
Joined: Jul 2009
Posts: 1,280
Likes: 35
Default

did you use adhesion promoter? yes it sands easy
Reply
Old Mar 15, 2012 | 07:27 PM
  #14  
ARLS1's Avatar
Staging Lane
 
Joined: Nov 2011
Posts: 84
Likes: 2
From: Springdale, AR
Default

For something nonstructural like the airbox lid, any general plastic epoxy should do well. Definitely use adhesion promoter and get one that's flexible(semi-rigid) so it doesn't crack again. Reinforcement tape is also highly recommended
Reply




All times are GMT -5. The time now is 03:46 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE