bondo + rain = What?? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-12-2006, 01:47 PM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
bondo + rain = What??

i've searched. i read martin sr.s post of doom. i know i have water soaked bondo now. it rained this morning and now it's afternoon and it's still out there since i can't stick tape on it, garage it, paint over it.

so the question is now this: will it evaporate out of there? and how long?? i will put a halide light under it (it's on my hood of my truck) for as long as it takes to be safe, if that will make all the water evaporate. will one day, or three by the time it evaporates, be enough to cause rust that will kill any future paint job?
just thought i'd mention i have about two inches of pink bondo showing above 4 inches of all-metal filler. the water wont be able to get out past the all metal, will it?

    Advertisement

Last edited by bullheimer; 07-12-2006 at 01:57 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-12-2006, 02:12 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,912
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Bondo+rain=rust? Do you have epoxy under it?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-12-2006, 02:30 PM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
that would be.... no
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-12-2006, 04:54 PM
35WINDOW's Avatar
Member
 

Last journal entry: Dash Mock-up
Last photo:
Join Date: Dec 2004
Location: utah
Age: 59
Posts: 1,395
Wiki Edits: 0

Thanks: 7
Thanked 21 Times in 19 Posts
Well,
I've waited a few hours for one of the "Experts" here to answer this, but I think everyone will agree (maybe? ). From what I have learned, Polyester Bondo has Talc in it, so it has more than likely absorbed the moisture putting Water against bare metal (see where oldred said bond+rain=rust)? You probably now have rust forming UNDER the Bondo, so, in my opinion you will need to start over-

This time, especially in your part of the world, it would make some sense to get it back to bare metal and them Epoxy Prime first, then Bondo-anybody here going to throw me under the Bus?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-12-2006, 05:17 PM
Registered User
 
Last wiki edit: Mopar tapered axle rear brake conversion
Last journal entry: What I'm doing now...
Last photo:
Join Date: Jan 2002
Posts: 4,267
Wiki Edits: 49

Thanks: 0
Thanked 4 Times in 4 Posts
Absolutely agree. Bondo + water = rust

Strip the bondo off the car spray epoxy primer on the bare metal (after you sand it to remove any rust), then you can put bondo back on. If you leave it like it is chances are that in time the repaired sections will rust from the inside out.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-12-2006, 05:38 PM
Henry Highrise's Avatar
Lost in the 60's
 
Last wiki edit: Removing stuck fasteners Last photo:
Join Date: Dec 2001
Location: Dixieland
Age: 69
Posts: 15,189
Wiki Edits: 4

Thanks: 0
Thanked 10 Times in 9 Posts
Yep! That pretty much says it....grind her out go too bare metal and start over. If you don't you will be sorry later on.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-12-2006, 08:00 PM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
now that you've all bummed me out... 2 questions:
1-is there a epoxy primer that comes in a spray can? like maybe industrial red oxide?

and
2: if i have bondo under said red oxide, has that absorbed water as well? i have seen water bead up on some of this red oxide stuff. trouble is, i don't know what this stuff i used (elsewhere on the truck unfortunately), is made of.

it has only had water on it for a few hours, you sure i can't evaporate it outta there?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-12-2006, 08:56 PM
Member
 
Last photo:
Join Date: Nov 2003
Location: Green Bay, WI
Age: 44
Posts: 2,073
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 6 Posts
Well, the all metal fillers (under your bondo) don't absorb water to the extent that regular bodyfiller will, but believe they still do absorb some. Plastic filler absorbs it like a sponge, but keeping some heat on it should eventually evaporate the water from the plastic filler. If that red oxide primer you are talking about was a spray bomb product it is likely lacquer primer, and really isn't protecting anything. If you fillers have soaked up water and it reached the metal, there would be know way of knowing without grinding it out of there . Do you want to take the risk? If this is a cheapy industrial paint, just get some color on the thing paint job, I'd say leave it. If you will be forking out some cash for a quality paint, Grind it out, start over with a good epoxy primer base. The little amount bodyfiller costs compared to quality paint, or even primers isn't really worth taking any risk. It will cost you time, but better then the time and money to do it over later when bondo is bubbling up and rust pushing through. I believe they may make some epoxy which is 1 part, at least i've seen stuff called epoxy in spray cans. I doubt it would be anywhere near as good as the 2k stuff. If you don't have spray equiptment, many epoxy manufacturers say you can apply with a brush or roller, if yo allow the right amount of flash time.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-13-2006, 10:20 AM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,912
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Believe it or not there is a 2K rattle can available! I have not tried it as I have no need for it but I thought it interesting anyway, I don't know if they have an epoxy but they do have a 2K fill primer. There is some sort of mixing device on the bottom of the can and once activated it has a shelf life of, I think, about 12 hours.



http://www.autobodysource.com/pdf/ju...6/spraymax.pdf
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-13-2006, 10:21 AM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
thanks. as you might know or have guessed my whole truck has been in primer for the last four years. etching, red oxide, then etching again. i guess every bit of bondo on my truck, which isnt a ton, should be trying to leap off of it by now. i havent seen any signs of it though. i have had some surface type rust over broad areas start coming thru, which i sanded all off and repainted. again with red oxide then the green etching primer, just for color. i really need to get some real paint on this thing, and as it's a 4 wheeler, it wont be a spending paint job. i will prolly end up painting it myself or have a friend do it, so i wont feel bad about brushes scratching it all up. guess i ought to get with it soon. sb
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-13-2006, 06:15 PM
Registered User
 
Last wiki edit: General Motors transmissions Last photo:
Join Date: Mar 2006
Location: near Yellowstone park
Posts: 4,278
Wiki Edits: 27

Thanks: 11
Thanked 251 Times in 235 Posts
water resistant bondo

My brother does a lot of his own body work.. age 73 He says he uses marine grade filler so he can leave it outside and not wory about moisture he says it costs about 5 times a much ar the cheap stuff
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-13-2006, 06:23 PM
Member
 
Last photo:
Join Date: Nov 2003
Location: Green Bay, WI
Age: 44
Posts: 2,073
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 6 Posts
Probably is epoxy filler. This is used a lot on the marine industry, and is pricey. The stuff we use to use came in two different gallon cans which both parts were mixed equally. Notice how many people have asked if he used epoxy primer or recommended it for the repair.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-13-2006, 06:32 PM
bullheimer's Avatar
NEVER use credit cards!
 

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,529
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
that would be what i need... or a garage. the camaro goes to a consignment lot on sunday after Goodguys. so my garage will be ready. i used almost a whole $25 quart of All-Metal filler just to do a tiny tiny bit. i kept putting in on with not enough catalyst cause it doesnt change color and having to scrape it off and start over. i just finally got it right when it rained. i have left a halide light under it and it was kinda hot to the touch. i have plastic wrap over it and i havent seen any condensation on the inside of it. there is tape on the top of it. so i am wondering how there could be much water in there if i dont see condensation from water evaporating on the underside of the plastic wrap. either the wind blew the hot vapors away, but i dont see how as i have the sides taped down too, or i didnt get that much absorbsion. either way. it's very hot. i dont see how any water could stay in there at that temp.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 03-19-2012, 09:17 PM
Registered User
 
Join Date: Mar 2012
Posts: 10
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
new Bondo and rain

It just happened to me, luckily I had about four hours of cure before it started a light rain, I went out and duct-taped a garbage bag over it as good as I could seal it (the hole is at the corner of the rear rocker panel and wheel well, and there's a support jack in the way, of course). I also rubbed some baking soda onto the surface of the Bondo and dumped a small box of baking soda into the garbage bag as a mild desiccant. The baking soda will create a dry area that should pull moisture out of the air and hopefully out of the Bondo as well. Tomorrow is expected to be sunny, I will test it at the end of the day after it's had time to dry by chipping a tiny amount of Bondo off and checking the bare metal for rust. I will put a fresh bag/baking soda over it throughout the day, hopefully with a better seal when I can see it in the light and remove the jack. I have never heard of this method of protecting Bondo from rain from anyone else, I invented it. I hope it works.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 03-19-2012, 11:48 PM
Registered User
 
Join Date: Mar 2012
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
yep

yep... Fill the holes with metal - put the epoxy primer on first, then bondo then and a sander-sealer on before paint. i painted a car in 93 that's never been parked indoors. -42C winter / +35C summer for years and the bondo still is in the front fender where i put it. nuff said.
Reply With Quote Quick reply to this message

Recent Body - Exterior posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which bondo should I use? Nightfire Body - Exterior 8 07-26-2004 05:38 PM
Rain gutter shaving ChrisMiddleron Body - Exterior 19 09-20-2003 09:35 PM
Bondo vs Dynatron ChrisMiddleron Body - Exterior 10 08-29-2003 04:07 AM
How long does it take thin amounts of bondo to crack? stonedchihuahua Body - Exterior 14 07-12-2003 08:02 PM
bondo removal question broncoman Body - Exterior 3 06-22-2003 01:16 AM


All times are GMT -6. The time now is 11:06 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.