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Gjac

Milford, CT

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Posted: 03/08/21 11:00am Link  |  Quote  |  Print  |  Notify Moderator

TECMike wrote:

Thanks everyone for their posts. Heng's seem to have a good following. However it is interesting that no one has used Proguard, which has a five year warranty if applied properly.
. People have used Proguard but it is much more expensive than the acrylic coatings. The proguard or liquid rubber is liquid EPDM and is suppose to last longer. The EPDM roofs have an outer white layer that will slough off in time exposing a black rubber substrate. Once the black is exposed the black rubber will absorb the suns rays and heat up the RV. My roof started showing the black at about 12 years of age, my friends MH is the same year as mine and his roof is entirely black now and hot inside because he never coated it. I coated mine with one coat of Cool Seal because a friend gave me a can when he bought a new MH with a FG roof. It looked great for 3-4 years then it started to wear of. My roof is 25 years old now and has never leaked . It looks about the same as it did at 12 years of age, so I figured the coating extended the roof’s life by 12 years.

Marcela

Kansas

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Posted: 03/09/21 05:59am Link  |  Quote  |  Print  |  Notify Moderator

I would seriously look at henrys tropicool 100% silicone roof coating.

TECMike

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Posted: 03/11/21 11:53am Link  |  Quote  |  Print  |  Notify Moderator

Does Proguard Liquid RV Roof coating need their primer applied to Eternabond areas prior to application of the coating?

AlmostAnOldGuy

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Posted: 03/14/21 08:37am Link  |  Quote  |  Print  |  Notify Moderator

TECMike,

I have used Proguard. From what I have read Hengs is easier to apply, but I do not have first hand experience with it.

In 2015 I applied Proguard for the first time. Due to weather conditions I ended up rushing the job and it made for a long day (clean, dry, mask, cut, roll). I also ended up with some spots a little too thick (the higher humidity and finishing late in the day did not help).

Anyway, after 5 years it was getting thin and I went with Proguard again because I was familiar with using it. So last August I split the job into 3 days and that made it easy. This is for a trailer where the roof is 26' long & about 8' wide.

Day 1 - Cleaned it well and took care of masking.
Day 2 - Opened a 1 gallon can and took care of the edges which extend down side of trailer 1/2 inch. Cut around all vents, skylights, AC and then used remaining to cover front couple of feet of trailer. Did not cut in around ladder where I get on and off.
Day 3 - Rolled the rest of the trailer. Had it marked in 45' sections and would apply 1 gallon per 45 sq ft.

This was done on 80 degree days when working with material I would start at around 9:30am and finish by around 11:00am before it really got too warm. No issues with pot life.

By splitting into three days it made it easy, no rush, and felt like it did a nice job covering and expect minimum 5 years out of this and perhaps more because I think I spread it more evenly. Once this is on it really does appear to be quality material.

Hope this is of some help.

Take it easy,
Stu


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JBarca

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Posted: 03/15/21 08:54am Link  |  Quote  |  Print  |  Notify Moderator

Marcela wrote:

I would seriously look at henrys tropicool 100% silicone roof coating.


I'll add to this,

Hi TECMike,

How many years do you want to get from your roof coating before you stop using the camper? The cost of the product and time to apply, changes with how many years you want to get.

I have done some in-depth looking and testing into roof coatings as my 16 year roof is getting thinner and I have no intention of selling the camper anytime soon. I have not yet, done a total coating install, but will in time. I have narrowed down the coating to the two below.

There is a need to understand the difference between acrylic coatings and then, silicone coatings and how each react to ponding water. Ponding water can breakdown acrylic coatings in some cases as they not made to handle that environment. Some campers have walk on roofs, others do not. Water sheds different from those two types of roofs.

Next up, are you using the coating to restore the shedding white layer of your old roof, or do you want to deal with all the seams and known leaks points which is wherever caulking was used and the infamous gutter rail area leaks?

There are 2 products that fall into the high solids silicone treatment for roofing. There may be more, but these 2 are the I found so far.

Here is the Henrys Tropical Cool. This system shows a lifetime warranty.
https://henry.com/retail/white-roof-coat........opi-cool-100-silicone-white-roof-coating

Here is the other, Crazy Seal. This system has a 50 year warranty.
https://crazyseal.com/?msclkid=9dec2a474820129b03794a082dcb511f

Both of them have 3 different viscosities of the product to work on different needs. You use the thicker viscosities over sound older caulk, there is a pump tube for joints if needed and then a open area thinner coating.

Both of these products have to be applied to a very clean surface. Both do work with 1 coat ~ 22 mils thick, but it is better with 2 coats, ~ 40 mill thick.

Both the Tropi Cool and the Crazy Seal have many similarities, the Crazy Seal is infused with fiber where the Tropi Cool is not. Both are rated for buildings and RV's. The Crazy Seal is targeted for the RV'er but rated for buildings. Tropi Cool is targeted for buildings but used on RV's. It is a marketing thing.

The Tropi Cool will most likely be a little cheaper. Both of these coatings will most likely be more expensive then the other RV coatings mentioned in this thread and take longer to install over all the leak prone areas. The end result can be better pending on what you are after.

The big thing I was after is the gutter rails and all the caulk on the roof. That is where the big issues are. As I stated, both products have 3 different viscosity's of the product to go over seams, sound caulking etc. The gutter rails, meaning dealing the the screw area down in the gutter, I had to create my own method to make it work. Over the winter I bought the Crazy Seal product and created test roof samples and applied the product to make sure I knew how it was going to react. The open areas and horizontal area worked flawless as the web site states over caulking and the large roof surface. At the gutter area I had to create a process to deal with them as it is a vertical surface. I have not tested the Tropi Cool product but from reviewing, I expect it to work very similar. If your roof has a large roof radius at the gutter rail that exposes a vertical section of roof, lets talk on how to deal with the vertical surface.

Both of these options create a maintenance free roof other then cleaning and inspection that is rated to last the life of the camper. And they deal with all the caulk issues of the original install.

Three things to note,

1. Any water damage to the roof system from a prior leak, should be repaired before the coating. This includes dealing with crumbling old dried up caulk.

2. Think about replacing all roof mounted plastic before the coating. Shower domes, tank vents, fridge vents etc. This is not a mandate, but dealing with them after the coating will be more difficult.

3. Crazy Seal will not create a long lasting bond to Eternabond. They will tell you that. I suspect Tropi Cool will not either and the same goes for the Dicro acrylic coatings as I have seen it lift on that product too. The top slick surface is the problem. There are ways to deal with this if you used Ebond, it just takes extra steps.

As Marcela stated, look into the high solids silicone coatings as you sort this out.

Hope this helps.

John

* This post was last edited 03/15/21 10:02am by JBarca *   View edit history


John & Cindy

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Cocky_Camper

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Posted: 03/18/21 08:15am Link  |  Quote  |  Print  |  Notify Moderator

I applied Heng's to my grandpaw's 1995 Pace Arrow roof 8 months ago. So far, it is holding up very well. I used eternabond and proflex around the seems first and coated everything.


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TurnThePage

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Posted: 03/18/21 11:20am Link  |  Quote  |  Print  |  Notify Moderator

JBarca is a smart guy and I wouldn't ever consider debating with him. But the Heng's acrylic latex coating I put on my EPDM roof, that by the way has lots of Eternabond tape, is holding up quite well. I don't know about water ponding as my roof is peaked so it all runs off. The only place I've ever seen any ponding is on the high side edge of the refrigerator vent, and that area is as intact as the rest of the roof. As it's easy to apply and is holding up well, I expect it'll be my go to product if recoating is ever again necessary. Maybe geography plays into it, I dunno. My trailer lives outside pretty far north in the inland northwest. Snowy winters and sunny summers with generally low humidity. Just reporting my experience.


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JBarca

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Posted: 03/19/21 11:53am Link  |  Quote  |  Print  |  Notify Moderator

TurnThePage wrote:

JBarca is a smart guy and I wouldn't ever consider debating with him. But the Heng's acrylic latex coating I put on my EPDM roof, that by the way has lots of Eternabond tape, is holding up quite well. I don't know about water ponding as my roof is peaked so it all runs off. The only place I've ever seen any ponding is on the high side edge of the refrigerator vent, and that area is as intact as the rest of the roof. As it's easy to apply and is holding up well, I expect it'll be my go to product if recoating is ever again necessary. Maybe geography plays into it, I dunno. My trailer lives outside pretty far north in the inland northwest. Snowy winters and sunny summers with generally low humidity. Just reporting my experience.


Hi Turnthepage,

Thanks for the good words. I know your screen name from over the years as a respected one. I am very open minded and the learning never stops. Lets compare notes and I will clarify some of my comments.

Let start with the coatings not sticking to Eternabond. When I bought my small batch of silicone coating from Crazy Seal, I quizzed them a lot about how the product works and if it will adhere to Eternabond. They told me it will not create a long term bond. They have seen it lift over time. There are work arounds for this, they just clarified their product will not bond long term to Ebond. In 2010 I Ebonded my entire camper and the roof is still pristine for 16 years, just the shed layer of the EPDM is thinning. The Ebond saved the seams of that camper which is why I needed to know if the silicone coating would adhere. I have a plan for this when I do the large open areas in the future, but the Ebond will remain on the camper, just not coated.

I camp with a group from the Sunline club, the brand camper I have and others I have restored. There are several of us that talk a lot and we see what each has done to the camper when we meet up.

Last summer we camped with a friend who used the Dicro acrylic coating to restore his 21 year old camper EPDM roof 3 years ago. He had Ebonded all the seams prior and he coated over them. During year 3, he started to see the coating lifting off the Ebond. That for sure peaked my interest. I went up on the roof from the side to see what he was talking about. Here are the pictures.

The gutter rail area with Ebond under the coating.
[image]

A close up so you can see better
[image]

A second area
[image]

Close up
[image]

It took 3 years for this lifting to start. The rest of the camper does not show this yet, but it will be watched as the years go on.

This adds some context to what I was saying. There is something about the slickness of top layer of Ebond that coatings have a hard time adhering to it long term. This may not be an immediate no stick thing. Pending the coating, it may not even be a problem if the coating lift stops at the edge of the Ebond. The point being, it may not adhere long term.

How long ago did you coat your roof? The camper in the pics lives in NW Ohio with mid west humidity, snow and freezing temps. He does put his camper in storage for the winter months. It lives outside the rest of the time. Please report back as the years go on yours if you see it lifting. It may be Heng's has something different or it just takes longer for the effect to show up.

To the ponding water comments, some non walk on camper roofs have the roof support system to allow the membrane to sag slightly, and water ponding can occur in those areas. A seasonal camper what never travels, would be large issues as the pond will never drain until it all evaporates.

See this pic from a 2005 camper roof I was doing some repair on for a friend who just bought it from a dealer. The caulk failed on the front seam, a leak started, then someone went up and put more caulk on. Look at the blackened molded area stain on the rubber roof. You can see where the water was ponding. The EPDM rubber was under water. It EPDM survived well, the front seam with bad caulk leaked.
[image]

If a camper has a roof structure that allows ponding like that to happen, it should be realized as it may be a coating problem. The coating has to handle being under water for periods of time that may take days to evaporate off. This is especially a concern on a seasonal site where the camper never moves or a camper stored between camping trips.

Some acrylic coatings have a characteristics of breaking down, again over time, due to being submerged under water a long time. A camper that sheds water all the time or one that is towed a lot, may not have an issue other then when it is stored and it rains. The ponding issue it something to confirm with the coating manufacture their coating is not affected by it to make sure you are OK. I have no data to report what a long time is.

Hope this puts the comments in context.

Thanks

John

TurnThePage

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Posted: 03/19/21 02:52pm Link  |  Quote  |  Print  |  Notify Moderator

Great feedback, John. I'll try to climb on mine this weekend and get some pics. It's just coming up on 3 years since I coated it. The trailer is 17 years old with original roofing material. The Eternabond is probably about that old too.
No leaks that I'm aware of. It's not a walk on roof, and I've put that to the test multiple times without falling through yet. [emoticon]

TECMike

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Posted: 03/22/21 05:24pm Link  |  Quote  |  Print  |  Notify Moderator

I have great respect for John's wisdom also.

I go back twelve years when we bought our trailer. At that time when it was only a month old, I spent a lot of time putting Eternabond on all of the seams and every penetration on the roof.

Lots of Eternabond on our roof. I have become a big fan of Eternabond. It shoows no sign of failing what-so-ever.

Over 75K plus miles and twelve years, we have been blessed by never having a leak.

So perhaps I should consider only coating the portion of the roof that does not have EBond.

Again, thanks to everyone who has kindly offered their opinions and help on this topic.

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