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07-15-2015, 11:30 AM
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#1
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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Best Tools for Removing Caulk?
I need to try to seal a leak somewhere around my rear windows on my 2008 Classic 25fb, that is running down to the subfloor.
Since I don't know where the actual leak is coming from I'm going to shotgun the whole rear end of my Airstream. I'm going to start with the clearance lights, then the rear awning mounting bracket, then the window frames, check the license plate area, tail light housings and finally the top of the bumper rub rail.
What caulk removal tools are needed to remove caulking around these items without marking up the surrounding aluminum?
The clearance lights have some caulking that is spread out from the base. I'm thinking of a plastic scraper.
What tool for the thin joint between the rear window and the curved pano frames?
What would I use for the heavier beads of caulk on the top and bottom rear window frames.
What would you recommend for removing the top rub rail caulk seam?
Thanks for any advice.
Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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07-15-2015, 11:38 AM
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#2
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Rivet Master
2015 30' International
2009 27' FB International
2007 25' Safari
Currently Looking...
Greensboro
, North Carolina
Join Date: Aug 2008
Posts: 1,564
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I use wooden blind slats trimmed to various sizes for different jobs.
Ms. Tommie Lauer
Sent from my iPhone using Airstream Forums
__________________
Happy trails and Good Luck
Ms Tommie Fantine Lauer, Greensboro, NC
AIR #31871 KQ3H
www.fantinesvoice.com
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07-15-2015, 12:05 PM
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#3
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3 Rivet Member
2010 28' Flying Cloud
Slidell
, Louisiana
Join Date: Nov 2009
Posts: 125
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I use thin strips of frp cut and ground to shape I need.
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07-15-2015, 12:42 PM
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#4
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Rivet Master
2012 31' Classic
Golden Valley
, Arizona
Join Date: Apr 2002
Posts: 569
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In replacing our bathroom vent with a Fantastic Fan, I had a lot of original Airstream caulking to replace. My fingernail worked great but didn't cover much surface area. I found, on another thread here, cow hooves! The treat for dogs. See the picture.
The hoof itself is not so good but the edge where they cut them off is GREAT!
Took about 20 minutes to clean about 99% off.
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07-15-2015, 01:45 PM
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#5
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Rivet Puller
2003 28' Safari S/O
Atlanta Burbs
, Georgia
Join Date: Jul 2010
Posts: 2,006
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The mechanical approach works best. I mask off the exposed areas adjacent to the sealant with tape so a slip by the scrapper (wood, plastic, FRP, horn) won't mar/damage the gel coat. If the PO used silicone or another product previously, use Motsenbockers Silicone, Latex, Caulk, and Foam Remover Gel to soften it before hand.
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07-15-2015, 01:55 PM
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#6
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Rivet Master
1979 24' Airstream Excella 24
Tipp City
, Ohio
Join Date: Feb 2012
Posts: 551
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I use the heat gun to soften the caulk. Makes it much easier to remove. My MH does not have clear coat so I use Aircraft Stripper to clean up all the residue. I don't think you would want to use paint stripper on a clear coated trailer. If you have a belt sander or a disc sander you can make custom scrapers any shape you want. I use cherry, oak would work well too. Pine might be too soft.
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07-15-2015, 02:08 PM
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#8
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Fibre reinforced plastic....
Bob
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07-15-2015, 02:59 PM
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#9
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3 Rivet Member
1963 26' Overlander
Dallas
, Texas
Join Date: Jul 2013
Posts: 243
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I second cow hoofs. Worked great for removing crusted on unidentified sealant on my AS.
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07-15-2015, 03:22 PM
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#10
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Rivet Master
1971 21' Globetrotter
Currently Looking...
Currently Looking...
Currently Looking...
Arvada
, Colorado
Join Date: May 2006
Posts: 3,530
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07-15-2015, 04:04 PM
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#11
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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Cow hoofs? Who would've thought. What about any of the plastic tools you can find in a home improvement store?
Not really looking to go online for this sort of thing.
How much of the original caulk to remove. On the rub rail the caulk is level with the top of the rub rail. Do I try to get most of it out before I tape it off?
Sorry, this will be my first attempt at resealing my Airstream. Don't want to screw up the adjacent aluminum.
Keep the suggestions coming.
Thanks
Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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07-16-2015, 10:50 AM
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#12
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2 Rivet Member
Currently Looking...
2003 39' Land Yacht XL 330 hp w/2slides
Fairlawn
, Virginia
Join Date: Nov 2014
Posts: 48
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Homax 2-Piece Caulking Tool Kit from Lowe's. Worked well for me removing all the caulk from the roof of our Classic 30. Which BTW, is a job I'm never doing again!
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07-16-2015, 10:56 AM
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#13
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2 Rivet Member
Bee Cave
, Texas
Join Date: Apr 2015
Posts: 22
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I've been doing this for the last few weekend. One of the POs probably was in the caulk business and they used it liberally whenever there was a leak. Of course, they figured they didn't need to get any of the old stuff off before applying the new stuff. Every vent, antennae, up on the roof had at least a half inch of caulk. I've removed it, painfully, with paint stripper, plastic scrappers, and a plastic stripper tool from Home Depot. It works, but it is not fun.
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07-16-2015, 12:16 PM
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#14
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Rivet Master
2005 30' Classic
Burlington
, Ontario
Join Date: Sep 2008
Posts: 2,743
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I generally use pospsicle sticks with the ends carved chisel like, or sometimes plastic spoon handles cut the same way!
Brian.
__________________
Brian & Connie Mitchell
2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.
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07-16-2015, 12:20 PM
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#15
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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My main focus is on the rear window seams and the bumper rub rail. Where the curved window frame meets the rear window frame is a small seam. Do I just run a razor blade in this seam to get most of the old caulk out?
What is recommended for removing the caulk on the upper rub rail seam?
Thanks
Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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07-16-2015, 04:26 PM
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#16
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Rivet Master
2012 23' FB International
Woodstock
, Ontario
Join Date: Aug 2014
Posts: 1,423
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Be careful with any goop that removes caulk. It will likely also remove clear coat. Paint thinner does not affect clear coat but anything that softens silicone will also soften clearcoat. I used Varsol or paint thinner to soften the Sikaflex on my antenna mount on outr'89. It still involves scraping and being careful not to dig into the aluminum skin.
Use any acrylic caulk or Sikaflex to reseal. Stay away from silicone that dries and in my experience, shrinks because it is super sensitive to needing an absolutely clean surface.
JCW
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07-16-2015, 06:20 PM
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#17
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2 Rivet Member
1978 31' Excella 500
Huntington Beach
, California
Join Date: Sep 2012
Posts: 27
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Saw a post a while back about using pressure inside the Coach to try to find the leak with soapy water. It would be a Bad Day if you ended up with more leaks than you started with !
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07-16-2015, 06:51 PM
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#18
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3 Rivet Member
1976 29' Ambassador
Fitchburg
, Wisconsin
Join Date: Oct 2007
Posts: 174
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I'm doing a lot of re sulking on my '76 Ambassador right now. The clear coat is pretty well gone so my tool choice is a little different. I'm using a 1" flexible paint scraper and a "7 way" tool (from paint dept) to carefully scrape out the old caulk between seams. A little low odor mineral spirits helps too.
Dennis
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07-18-2015, 07:59 AM
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#19
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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Quote:
Originally Posted by Jerry Ski
Saw a post a while back about using pressure inside the Coach to try to find the leak with soapy water. It would be a Bad Day if you ended up with more leaks than you started with !
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That is a concern with me too. There is an RV service shop local to me that offers leak detection. I'll check with them to see what their process is. They work on some high end units so I'm hoping they have a pressure test.
My 2008 is probably due for the roof vents to be resealed. I really need to find a light weight collapsible ladder.
Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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08-15-2015, 02:16 PM
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#20
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The Sign Lady
1969 23' Safari
1974 Argosy 22
1964 24' Tradewind
Victoria
, British Columbia
Join Date: May 2012
Posts: 677
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I had a variety of different caulks from the past 4 generations but my favorite items for removing old caulk has been a dental scaling tool for the cracks and crevices, an old really dull chisel, broken wooden popsicle sticks for wider areas and old wine bottle corks to use like an eraser for minor residue. For the older style caulking (Vulkem) on my 69' Safari I used Rapid Remover. It's a adhesive remover I use at work. Spray it on let it sit, spray more and literally wipe the old vulkem off and best of all it doesn't touch the plasticoat clear coat on the old school trailers.
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