Removing Moldy Diamond Shield From An RV

We all have to do lists, right? Well, sitting atop my to-do list was removing moldy Diamond Shield from my motorhome. Ever since we bought our RV I wanted to get rid of the dirty, ugly, Diamond Shield off the front of the RV.

how to remove Diamond Shield from your RV
Moldy Diamond Shield on RV Example (image: SuperDad, iRV2 Forums Member)

Diamond Shield sounds great, right? Sounds almost bullet proof. The point of it is to protect your front end from rocks that get kicked up at you while on the road. It’s a clear film that covers the entire front end. Most of the time when an RV has a Diamond Shield on it, you don’t even know it’s there.

Apparently around 2006, the product wasn’t so great. Either the product allowed moisture underneath the film or there was a problem with the application process. The moisture under the film ended up molding. It turned the entire front end of the RV into a dirty-looking brown with dark mold spots all over.

I talked to several other RVing folks that either had the same issue or knew someone who did. The 3M Company made a similar product. All RVers stuck with that moldy shield on their motorhomes recommended different products or places to go to get it fixed.

There are many ways to remove Moldy Diamond Shield

The biggest thing that scared me away was the time commitment people were saying it needed. They said a minimum 24 hours of scraping.

I had a long talk with the Diamond Shield manufacturer, hoping they’d feel bad for me and offer to do it for free since their product was junk. No dice there. They said they’d be able to take it off for around $1,500 and that didn’t cover any paint damage that may occur. Then they wanted another $1,200 to put another film on. Not sure I want to try that again.

I looked into products to get rid of moldy Diamond Shield from an RV.

Then I called places to get estimates for removing moldy Diamond Shield from an RV. After countless hours researching the RV groups on Facebook, other RV forums, and talking with Newmar, my RV manufacturer, I was at a loss.

As fate may have it, we pulled into a campground and a guy one row ahead of us was out in front of his rig working away on something. He was working on the exact problem I had: moldy Diamond Shield on the front of an RV.

Bruce was more than willing to share the knowledge he learned by working on his. And he wanted to pay-it-forward and hopefully prevent some of the mistakes and time drains for the next guy. I was the next guy!

By the time I was ready to leave, he had given me one of the nylon scraping tools that he was using. He gave the name of the solvent to remove moldy Diamond Shield. And most importantly gave details on each step of the process. I went back to my rig all fired up to get started.

Supplies to Remove Moldy Diamond Shield from an RV

To get the Diamond Shield from an RV, you need the following:

Step 1: Scrape Off the Moldy Diamond Shield

Bruce said this was the hardest part for him, but turned out to be the easiest part for me. He had a 3M product on his coach and I had Diamond Shield. Supposedly, Diamond Shield is a thicker mill film, so it came off in larger pieces, which made it faster for me.

The first step in the process is to get the film off. I used the clothes steamer and the scraper tool.

I also had some sand paper for when the edge of the scraper tool got a bit dull.

Use the steamer to steam a small section of the Diamond Shield.

You’ll see it start to sweat. Really heat the glue underneath to make it easy to release.

Then use the scraper tool to scrape it up.

It’s just like peeling a potato. Scrape in straight lines on the section that you just steamed. The film comes right up. You shouldn’t have to scrape too hard to get the film off. If you find yourself scraping too hard, just steam it some more.

Do this all over the front end where the moldy Diamond Shield is located. Work in sections and be patient. It takes some time. The most efficient way to go about it is to make nice, neat rows.

After scraping all the film off, your coach will look WAY better. But that’s only half the job. Well, maybe not even half.

Before & After of Moldy Diamond Shield Removal
Before & After of Moldy Diamond Shield Removal

Step 2: Remove the Diamond Shield Adhesive Glue

The next part is to remove the Diamond Shield glue residue stuck on the RV. This is also where the big mold spots are located. You also need to scrape those off.

First, open the Contractor’s Solvent. Pour it into a spray bottle

Before you start spraying, you’ll have to do something with your headlights.

Covering the headlamps prevents the solvent from fogging them up. The solvent made the plastic headlight covers on Bruce’s RV very hazy. Now he is going to replace them.

You can remove your RV headlights if it’s not too much trouble.

Or you can tape over them with blue painter’s tape. This method worked pretty well. But there were spots where the solvent must have crept under the tape. It’s not horrible, but I notice it. You have been warned!

Get your spray bottle filled with the solvent. Start spraying at the top of the Diamond Shield residue.

When scraping off the glue, it sometimes crawls down the front of your rig. The glue is still a bit sticky, but also slippery, so it’s kind of a slime that can get stuck on lower parts of the rig. You don’t want that ending up on a section you’ve already cleaned up.

I find it easier to spray the solvent on your coach in sections. The solvent will drip down the front, and that’s okay. Give the solvent a minute or two to do it’s work, then spray it again. You want the solvent to dissolve the Diamond Shield adhesive glue. But it must be wet when you scrape.

Let the solvent soak for a minute or two. Make sure it’s nice and wet. Then go ahead and scrape it with firm, even pressure. If you have to scrape too hard, there isn’t enough solvent on it or the solvent hasn’t had enough time to do it’s thing.

Scrape off the Diamond Shield adhesive glue.

Eventually you’ll learn how long to let it sit, and how much solvent to use. From my experience, scraping off the glue took much longer and was a much more tedious step than removing the moldy Diamond Shield film. The glue isn’t cooperative and generally doesn’t come off in strips like the film did.

Be very, very patient. Eventually the scraping works. Your motorhome front end will look like new when you’re done. It took me about four days to do my rig.

  • I took the entire film off in one day, putting in about eight hours on the job.
  • The other three days were spent getting the glue off. I worked about four hours each day.

No More Moldy Diamond Shield on your RV

No more moldy Diamond Shield! (Image: TLGPE, iRV2 Forums member)

I’m so glad I took on this endeavor. The rig looks like new and I love sharing this knowledge with other folks in the same situation. Moldy Diamond Shield is literally a black eye to an otherwise beautiful coach. Best of luck to you in getting your coach cleaned up and as Bruce said, pay this forward and share it!

Tips provided by Craig Royal

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Click Here to Leave a Comment Below 28 comments
Penny J - December 1, 2017

Hi, thanks for the info. The solvent, are you talking about home builder contractor, something at Home Depot type stores?

    admin - December 3, 2017

    Hi Penny,

    Orange-Sol Contractor Solvent works great, you can find it on Amazon

Ed - March 22, 2018

Hi Craig!

Great info. What specifically do you mean by “nylon sticks”? Is there a particular product for scraping that you would recommend?


C&J Wojo - April 11, 2018

Bought our used Fleetwood Discovery and love it but that awful diamond shield has a mold look to the front on an otherwise nice looking coach. Thanks for the tips on our first project on it. I’ll take pics along the way and post to pay it forward too!

Matt - April 28, 2018

Sounds like a lot of work. I removed mine with a 15 degree spray nosel on a 3800 psi pressure washer. Looks like new and was easy as pie.

    Jim - September 11, 2018

    Matt – sounds like a much easier idea but I’ve not seen anyone else try this. Seems like the pros would use this unless there is a down side. I have a pressure washer (along with a bad diamond shield on my RV). Can you add more details? Did you use any heat of any kind? Did the pressure washer also remove the adhesive or was that a separate process? Any adverse affects that you are aware of?

    Cecilia - October 13, 2018

    REALLY, it didn’t damage your paint finish? What year was your rv. I would prefer to try your method but I’m nervous it will damage my rv. Any feedback from others on doing this?

    Robert - April 10, 2019

    Matt, I’m interested in getting a description of the pressure washer process you used to get Diamond Shield. Thanks

joseph lynch - May 7, 2018

I used the steamer and plastic razor blades to remove the film. I then used Cut Thru Aerosol on the residue along with the plastic razor blades. Took about 8 hours but well worth it.

Tony Valentine - May 22, 2018

Yes Diamondshield/Durashield product sucks!
I have a 2016 fleetwood with 14,000 miles and they won’t honor their 5 year B.S. warranty.

They sent me a kit to remove ty he crappy film FREE , so I suggest everyone call for it.
Their parent company is

Contacting a lawyer to start class action lawsuit if anyone is interested.

    kevinpvb - January 17, 2019

    I’m interested in the class action suit. Mine is a 2011 Fleetwood Discovery. The ugliness is starting.

    I’ll contact Sharpline and see what happens.

    Joan - February 26, 2019

    I have a 2016 Holiday Rambler with 13000 miles and the same thing is happening with us. I haven’t contacted Diamond Shield yet, I was just on this site trying to get ideas on how to remove it…then I saw your comment. Any further info regarding your case?

    Mike - March 15, 2020

    I can’t believe my new Newmar Motorhome looks so bad. I have spent hours trying to remove the mildew and have decided to just repaint it. Much less than having it taken off and reapplied. DURA SHEILDBhas got to be the worst product ever invented.

    Sam Brown - April 8, 2021

    Li have a 2013 ItascaEllipse that bugs and road debris has destroyed the Clear Shield covering. Warranty is non existent . Coach only has 40,300 miles..
    I’m 85 years old and for me to physically remove and replace the mess is there any simple solution? I’m old but not physically incompetent even for a 85 year old Airborne Vet.
    Thoughts and suggestions will be appreciated.
    Shy Sam.l Brown
    Veteran 11th and 82 ABD

    Jim shook - December 17, 2021

    I’m in ….cost $1800.00 dollars so far and there’s more to do. Diamond shield is the worst product you could put on a motorhome. 2015 WB Adventurer. Been under cover..and still went bad.

jim - September 12, 2018

Has anyone else tried a pressure washer as mentioned above. Seems to be much easier but I wonder why all the “pros” that do this every day don’t use it. Also, how would you get all the adhesive off?

Ed Felix - January 26, 2020

Dura shield molding dura shield said because of weather conditions where I keep it for extended times I have a 10 year warranty on it and they will not do anything

Billy Russell - April 7, 2020

I have a 2009 Dutch Star with the same thing and someone stopped by and told me he had same problem. He said he got some plastic scrapers from Harbor Freight and used his wife’s hair dryer and warmed up the plastic and used the scrapers to remove it. For the glue that remains he used gasoline and rag to remove it.
I am using the Pittshurgh Non Maring Scraper Set and the heat from the SUN and it takes very little pressure to scrape it off. As for getting the glue off I don’t know if I’ll use gas for that or not. When I remove all the coating then I’ll decide what to use for the glue. I’m a full time so I’ll just take my time doing it after I get the coach waxed.

Billy Russell - May 12, 2020

An update on the mold on the Dutch Star. I finished the job and so glad I did. It looks like a new paint job. To get the glue off, I went to Lowe’s and got 8 bottles of GOO GONE and sprayed it on and used a cheap plastic scraper, also from Lowe’s,and after spraying and letting it work in a little I just scraped off the glue. I DID NOT remove or tape the headlights a d sprayed the GOO GONE on them also and no damage was done. Even with no wax on it the front shines very well. Of the 8 bottles of GOO GONE, I RETURNED 3 for a refund and kept 1 for personal use. I did buy a can of Contractors Glue Solvent but it didn’t know as well as the GOO GONE. I’m more than happy with the way the RV looks now.
I did not remove the lettering on the front and the remover never affected it either. I used a small knife point and scored the plastic just enough to penetrate it and used the plastic scrapers to remove it from around the lettering. I only had 2 small paint scratches that can only be seen by looking very closely.

    Sharon Dunn - August 21, 2020

    Billy Russell, did you remove the plastic from the inside of the lettering on the front also? If so, how? Our lettering is on TOP of the diamond shield – I don’t know what IDIOT decided to do that! What size bottles of GOO GONE did you buy and specifically what kind of GOO GONE was it? I thought I saw some GOO GONE MAX online yesterday, so just curious what exact type you used. Thanks for any help.

Karen Buyno - March 20, 2021

I do not want to remove the diamond shield I just want to remove the mildew. Suggestions on how to remove mold?

James Hairston - July 3, 2021

I find it interesting that a brand new industry has emerged from the absolute ineptness in the creation of a RV “paint protector” (Diamond Shield! The Diamond Shield is so susceptible to contracting mold/mildew, the company offers a METHOD by which the shield can be removed! To add insult to injury, the company also strives to have the customer install yet ANOTHER shield of the same stuff! I, too own an RV (name w’held for legal reasons)which has become victim to the shield. Understandably, my RV is 15 years old and I expect some age-related problems to occur; however, the thing gathering mold and requiring many hours of manual labor by myself in order to correct the issue is not a viable scenario! I feel it should be, at least in part, a “shared” responsibility (myself AND Diamond Shield) in the correction the issue! I have not approached Diamond Shield, as I feel doing so would result in their refusal of accepting ANY responsibility and my becoming angry! I have done enough research on the issue that I realize the “big boys” have, have, once again laid it to the consumer and he alone to rectify the situation! In closing, I’ll simply remove the shield, restoring my RV to a sight much kinder to the eyes! I worked for several days removing the Diamond Shield from my RV and, “NO, Diamond Shield, I will NOT install a new shield! I’ll just continue to read the complaints and watch you sink slowly into the quagmire of dissent your R&D Department has created!

Kenneth Conley - September 14, 2021

I have a 2017 Newmar Canyon Star and I have the same problem with my Durashield! I can’t believe any company would condone using this product after all of the years of complaints that I find on the internet, what garbage!! I found your post very informative and I plan on tackling the problem as soon as the weather cools down, thanks again for the great info.

Susan zick - April 3, 2022

We have a beautiful 2015 40’ RV and this Diamond Shield makes it look like it’s 25 years old. I hate this stuff. It started mildewing after about 4 years. Our coach only has 19,000 miles on it (we take lots of short trips) and we are original owners. We take good care of our rig but this is beyond our control. We just started working on taking this junk off and we’re very frustrated. I came upon your post so we will be changing our process immediately. Thanks for the info!

    Rene Agredano - April 5, 2022

    You bet, Susan. Let us know how it turns out. Good luck with that project!

HAP - May 5, 2022

Not sure they are still in business, but I have talked to this company before and they have videos on YOUTUBE last time I checked.

They sell a wonderful product. Good luck.

Barry - May 7, 2022

Thank u so much for sharing. I’m about to dive into this very same challenge and ur tips ate great! Also I learned u can’t be in the sun when doing this as the solvent must stay in shade.

    Rene Agredano - May 9, 2022

    Oooh thanks for that tip about doing the work in the shade! Super good to know. Good luck with your project Barry.


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