Thread Tools Display Modes
Old 08-09-2016, 03:26 PM   #1
Raw Slaw's Avatar
Join Date: Aug 2013
Posts: 18
Leaking Windows

After pulling, scraping, cleaning, and caulking our windows, we still have a bunch of leaks. We used silicone weatherproof window caulk, put insulation board pieces in the big gap at the top of the window, and then used Great Stuff foam to fill the gaps from the outside.
So, what should we do now? We have to pull them out and reseal, but I'm terrified of having to do this a third time if this next shot doesn't work. I've heard people say butyl tape. Do you just put that around the edges like you would caulk? Is this sufficient or would I need an additional caulk like elastomeric sealant? Thanks.

Links to products appreciated. Really bummed we blew this money only to have to pull them back out.
Raw Slaw is offline   Reply With Quote
Old 08-09-2016, 03:33 PM   #2
Bus Nut
Join Date: Jan 2015
Location: Kansas
Posts: 259
Year: 2000
Chassis: International 3800
Engine: T444E
Rated Cap: Your mom
That great stuff foam is an open cell foam product. If you want it to be water proof you need to use a closed cell foam...
slaughridge85 is offline   Reply With Quote
Old 08-09-2016, 04:14 PM   #3
Bus Nut
Join Date: Jun 2016
Location: Garden State (rural NJ)
Posts: 383
Many also recommend butyl caulk over silicone. Auto manufacturers use butyl for a reason, I suppose.
BusFiend is offline   Reply With Quote
Old 08-09-2016, 08:34 PM   #4
Bus Crazy
Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,121
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
Rated Cap: 36
For a good seal on metal I would recommend one of the thermoplastic caulks, or butyl tape if you can properly sandwich it between the flanges. Never much cared for that silicone stuff..

EDIT: Supra expert is my favourite thermoplastic caulking so far. No affiliation, not trying to sell it, it's just my go-to for sealing steel stuff. It doesn't crack like silicone does when stretched.
My build page: Armageddon - The Smell of Airborne Rust
jazty is offline   Reply With Quote

Thread Tools
Display Modes

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:51 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.