RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC Technical Forums > Repairs & Service
Click Here to Login

Thread Tools Search this Thread Display Modes
Old 04-15-2019, 04:34 PM   #1
Montana Master
RKassl's Avatar
Join Date: May 2005
Location: Fall Creek
Posts: 1,261
M.O.C. #3699
Black "Plastic" Material Under Bedroom Slide

I noticed a crack in that black plastic material outside and under the bedroom slide last year. Put a piece of that black fabric tape from the dealer on it and I noticed today the crack is about 2" longer. Any ideas or suggestions on how to STOP the material from cracking more.

Bob and Nancy Kassl Fall Creek, Wisconsin
2015 Montana 3440RL Legacy Edition, G614's, Pressure Pro TPMS, Dish Tailgaters
2016 GMC Sierra Denali 3500 CC SRW, Iridium Metallic, Duramax Allison Transmission
RKassl is offline   Reply With Quote
Old 04-15-2019, 04:39 PM   #2
Ram Montana High Country
Montana Master
Ram Montana High Country's Avatar
Join Date: Jun 2017
Posts: 1,120
M.O.C. #19944
do you lube this area like you do the slide seals? I've seen plastic welders before. FFT.
RAM 19' DRW 3500 Crew LB / 2020 373RD HC
MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
Ram Montana High Country is offline   Reply With Quote
Old 04-15-2019, 08:40 PM   #3
Montana Master
Theunz's Avatar
Join Date: Mar 2016
Location: Catoosa
Posts: 617
M.O.C. #18384
A crack will keep traveling until something releives its stress. If you drill a small hole at the very ends of the crack it will usually relieve the stress. Then cover everything with tape again to keep moisture and bugs out.
2015 3100RL legacy...2005 Ford F-250 CC SB. Tows like a charm! 4/19 Updated to 2017 Chevy 3500 CC SB SRW -hope it tows as well as my F 250 did!
Theunz is offline   Reply With Quote
Old 04-16-2019, 10:57 AM   #4
Montana Master
beeje's Avatar
Join Date: Oct 2015
Location: westminster md
Posts: 1,992
M.O.C. #17894
I have several cracks on mine that I noticed when buying it used at the dealer. I had them put in the contract for them to replace it as part of the sale. When I found out the entire slide has to be removed the do so I decided to just get them to pay me for the job and deal with it. I did not want them to create more issues by doing so. My cracks are stapled every inch and covered with silicon caulk. I keep the bottom gasket and bottom of the slide well lubed up with 303
2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
beeje is offline   Reply With Quote
Old 05-06-2019, 06:55 PM   #5
Montana Fan
Join Date: Dec 2015
Location: Sanford
Posts: 114
M.O.C. #18136
I had a couple of cracks and a piece actually missing on mine. I used Flex Seal first and then covered the Flex Seal with a large piece of heavy duty plastic coated duct tape. That was three years ago and it is still holding. Theunz's suggestion of drilling holes on each end of the crack to relieve stress is an excellent one. Should take less than fifteen minutes to complete the repair.
Neverhome is offline   Reply With Quote

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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 06:56 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.