Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 05-29-2013, 04:58 PM   #1
sbranen's Avatar
Join Date: May 2012
Posts: 48
Do you have a leaking fiberglass roof?

I have a 2012 Tiffin Open Road Class A Motorhome. I experienced a leak around the vent an d I had La Mess RV in San Diego seal it. They used Dicor and it cracked and could easily be pealed off the roof with your bare hands. I call Tiffin Motorhome Company and they told me their fiberglass roof should be sealed with CSL 515, white silicone caulking. I had it sealed with CSL and it worked perfectly. If you need some you can purchase it by calling Walcott-Park Inc., 1-585-342-3120Ext. 100. This is the only place I could find CSL. I hope this helps. It costs about $6.50 a tube.
sbranen is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-29-2013, 05:55 PM   #2
Junior Member
Join Date: Aug 2012
Posts: 24
Is this for Tiffin Fiberglass Roofs Only? Or should it do well on any fiberglass roof?
Haleyjean50 is offline   Reply With Quote
Old 05-29-2013, 07:47 PM   #3
sbranen's Avatar
Join Date: May 2012
Posts: 48
I wouldn't swear to it but why wouldn't it work just as well for all fiberglass roofs? It is a heavy duty commercial silicone product used and recommended by a major motorhome manufacturer, (Tiffin). I would call your your motorhome manufacturer and see what they recommend. Whatever caulking you decide to use, always completely clean off the old caulk and use an effective cleaning agent to prepare the area you intend to reseal.
sbranen is offline   Reply With Quote
Old 05-29-2013, 07:55 PM   #4
Senior Member
PyrateSilly's Avatar
Monaco Owners Club
Join Date: Jul 2011
Posts: 2,200
Never will I ever put silicone on my RV roof again!! We decided to go with a product from Teakdecking which is rated for marine use so it flexes and works well around water. Some go with marine caulking from 3M.
Thom and Christine having fun in a 1993 Monaco Crown Royale Signature Series 40ft 300hp RV. Towing a Fiat 500 Abarth and a Harley.
Our blogged repairs and travels
PyrateSilly is offline   Reply With Quote
Old 05-30-2013, 10:25 AM   #5
Moderator Emeritus
Gary RVRoamer's Avatar

Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 26,318
I wouldn't use silicone cause it is problematic to ever coat anything over it again, including more silicone. There are other excellent products for use on fiberglass, e.g. Geocel Proflex RV, Surebond SB140, Geocel MHRV 2300, Sikaflex, 3M Body Seam Seal, etc.

Besides, failure of the Dicor to stick is more likely inadequate prep work than a problem with the fiberglass. There is, however, known incompatibility of Dicor with some types of plastic, e.,g the acrylic plastics used in skylights. That results in cracks in the plastic, not leaks.
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
Gary RVRoamer is offline   Reply With Quote
Old 05-30-2013, 11:02 AM   #6
Senior Member
docj's Avatar
Official iRV2 Sponsor
Join Date: May 2011
Posts: 8,210
The caulk being recommended seems like it might be a bit different from the silicone caulks we all are used to buying at Home Depot. Here's a link to the website for it:

CSL 515 Self-Leveling Industrial Sealant - Overview | CSL Silicones Inc.

It looks as if finding a place to buy it might be a problem. I'm only speculating, but I wonder if it has any relationship to this sort of product which I have had good luck with. It is sold for boating applications: Boat Life Lifeseal Sealant Tube, Clear: Sports & Outdoors

This calk is a polyurethane/silicone mix of some sort.
Joel (AKA docj)--
RV Technology Specialist
docj is offline   Reply With Quote

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

Advanced Search
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

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 01:32 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.