RV.Net Open Roads Forum: Travel Trailers: Seal around windows, doors, and lights

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Travel Trailers

Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Seal around windows, doors, and lights

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Sponsored By:
RideSlow

Pacific Northwest

Senior Member

Joined: 02/01/2005

View Profile


Offline
Posted: 05/26/22 03:40pm Link  |  Quote  |  Print  |  Notify Moderator

Why do I remember reading somewhere not to use silicone based caulk or sealant on the exterior of the trailer?


2007 Dodge Ram QC 4x4 6.7 CTD 3500 SRW
2014 Stealth AK2612 TH
2004 HD Ultra Classic

Lwiddis

Cambria, California area

Senior Member

Joined: 08/12/2016

View Profile



Good Sam RV Club Member

Offline
Posted: 05/26/22 04:18pm Link  |  Quote  |  Print  |  Notify Moderator

Your reading was accurate IMO and silicone is not recommended by most RVers.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AH Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


mosseater

Dillsburg, PA

Senior Member

Joined: 10/19/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 05/26/22 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

Dicor or equivalent only. Once you put silicone in place, nothing else is ever going to stick to it.


"It`s not important that you know all the answers, it`s only important to know where to get all the answers" Arone Kleamyck
"...An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." Col. Jeff Cooper
Sunset Creek 298 BH


Gdetrailer

PA

Senior Member

Joined: 01/05/2007

View Profile



Posted: 05/26/22 05:36pm Link  |  Quote  |  Print  |  Notify Moderator

Because it doesn't work and will fail.

For whatever reason, silicone caulking randomly will not get good adhesion to both surfaces and no way to predict exactly where it doesn't get good adhesion, creating random weak spots. Those random weak spots over time fail just enough to allow water to wick it's way right past the silicone.

Additionally, cured silicone is a real bear to remove and once cured not even new uncured silicone will adhere to the old cured silicone, ever, making your next repair a real time consuming nightmare to correct.

Silicone caulking is pretty much worthless.

Lets just stick with what does work, remove the window/door frames, remove the old butyl rubber caulking (removes easily with mineral spirits) and refresh with new butyl rubber caulking (rope or flat).

Yes, butyl caulking does dry out over time.

Yes, butyl caulking does crack over time.

Yes, butyl caulking will need replaced periodically.

But, even with those issues it simply works and will do so for 5-6 yrs at a time and unlike silicones it is easily replaced and if you compared the cost of butyl caulk vs a bunch of tubes of silicone it is very low cost.

And don't be tempted to take the lazy way out and slather on any caulking on the outside of the frames or trim, it just wastes money, time and looks horrible and will leak even faster.

Fisherman

Angus, Ontario, Canada

Senior Member

Joined: 09/28/2002

View Profile


Offline
Posted: 05/26/22 08:03pm Link  |  Quote  |  Print  |  Notify Moderator

If it's something I want to last, I go with polyurethane caulk.

Bobbo

Wherever I park

Senior Member

Joined: 09/16/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 05/26/22 08:51pm Link  |  Quote  |  Print  |  Notify Moderator

mosseater wrote:

Once you put silicone in place, nothing else is ever going to stick to it.

Not even more silicone.


Bobbo and Lin
2017 F-150 XLT 4x4 SuperCab w/Max Tow Package 3.5l EcoBoost V6
2017 Airstream Flying Cloud 23FB

RideSlow

Pacific Northwest

Senior Member

Joined: 02/01/2005

View Profile


Offline
Posted: 05/26/22 11:41pm Link  |  Quote  |  Print  |  Notify Moderator

mosseater wrote:

Dicor or equivalent only. Once you put silicone in place, nothing else is ever going to stick to it.


Thanks, that is the reason. (Getting brain full syndrome)

mobeewan

Hampton, Va

Senior Member

Joined: 01/03/2007

View Profile



Posted: 05/27/22 04:27pm Link  |  Quote  |  Print  |  Notify Moderator

My experience:

OSI QUAD is used around doors and windows on houses and buildings. It is available in colors, but typically only carried in white, black, grey & beige at Home Depot & Lowes. Works good on aluminum sided RV's. Should work good on other RV siding, but can't positively say it does. Also used it to seal around new PVC brick molding around doors and windows on a house and the doors and trim on my new wooden shed.

From the mfg:
OSI QUAD is composed of elastomeric polymers and high quality synthetic resins. This product offers the superior adhesion characteristics and unmatched elasticity found in high performance sealants. It yields a tough, rubbery seal which resists outdoor weather-related elements.

With resistance to UV and extreme temperatures (20°F to 120°F) and proven wet surface application, OSI QUAD is the versatile and durable choice for professional contractors.

deltabravo

Spokane, WA

Senior Member

Joined: 09/08/2003

View Profile


Offline
Posted: 06/06/22 06:44am Link  |  Quote  |  Print  |  Notify Moderator

Here's a good video


2009 Silverado 3500HD Dually, D/A, CCLB 4x4 (bought new 8/30/09)
2018 Arctic Fox 992 with an Onan 2500i "quiet" model generator

Thermoguy

Graham, WA

Senior Member

Joined: 01/04/2017

View Profile



Good Sam RV Club Member

Offline
Posted: 06/11/22 02:37pm Link  |  Quote  |  Print  |  Notify Moderator

I was at a reputable dealer yesterday to get caulk (not camping world). They only had dicor and 100% silicone caulk. I asked them what to use, use dicor for the roof and silicone for windows and doors and everything else. I told him I had read to never use silicone, he disagreed and said they put silicone on all trailers they sell or service. This is a reputable dealer (in OR) that sells a NW brand many rave about. I was very surprised, but purchased the dicor based on this website. Glad I read through these treads. I'm replacing my downspouts and silicone is not the right product...

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 

Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Seal around windows, doors, and lights
Search:   Advanced Search

Search only in Travel Trailers


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2022 CWI, Inc. © 2022 Good Sam Enterprises, LLC. All Rights Reserved.