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 > Finished! Roof Coating/Maintenance Report with Henry's 877

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Chuck ..

Salem, Oregon

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Posted: 10/19/20 10:56pm Link  |  Quote  |  Print  |  Notify Moderator

This year, I took on completely re-coating my RV roof with Henry 877 Tropi-Cool 100% Silicone White Roof Coating.
Products cost about the same online or Home Depot. $239.89 for large tub of Henry's coating and $12.99 per tube of caulking.

If you see from my previous post a couple of weeks ago, I did a lot of research trying to find the best product to repair/re-coat my RV roof with. I worked like a dog for nearly a week trying to beat the Fall weather. Wished I could of done the roof repair/coating in better weather conditions. Sweating bullets all week worrying about the possibility of rainy weather.

Below is my step-by step process, along with before/after pictures.

CAUTION! Slow down on the roof. If you fall off you will probably spend a lot of time in the hospital recovering if you are lucky!

My Process
Well it took me most of a week to completely re-coat my RV roof!
Tuesday Morning

  1. Using a mixture of bleach, TSP, and water, hand scrub the entire roof (I did use a pressure washer to get the dirt out from under the roof air conditioner units). This took me a good part of the day alone!
  2. Peel off the old, very thin rubber coating

Three and a half days later, wearing out a pair of leather gloves, I thought I gave it my best shot at getting off the old coating

Saturday Afternoon
Apply the new coating

  1. Clean out all of the old caulking above the roof gutter and replace it with new Henry's caulking.
  2. Mix the coating with a drill. Pour out about one quart into a paint tray. The Henry 877 coating pours out like the thickness of pancake syrup.
  3. Use a leaf blower to blow off any material laying on the roof
  4. Begin applying the Henry 877 using a four inch paint brush to do the corners, sides, roof pipe outlets, vents and air conditioners. I only did a 5 to 7 foot section at a time.
  5. Use a 9 inch long by 1/2 inch nap paint roller to spread out the Henry's roof coating. This took about two to three hours to fully cover the 8 foot wide by 34 foot long 5th wheel roof with one coat.
  6. On the next day, apply a second coat. I used about a full 5 gallon tub/container to do two coats.



Lessons Learned:

  1. Try to apply the coating on fairly calm day. The wind can carry the coating in the air when applying it.
  2. I applied the coating when the temperature was in the mid 60's to upper 68 degrees. Sun helps, but I cannot imagine trying to apply Henry's coating or any other roof coating on a day when it is approaching upper 70 degrees or higher. Too hot for me to do a roof!.
  3. The roof must be completely dry before applying the new coating. During the Fall season, moisture in the morning is hard to dry off the roof, you may have to wait for the sun to come out. Dampness or morning dew can take several hours to dry off the roof.
  4. Give yourself plenty of time to do a good job. The faster you try to apply the roof caulking or roof coating you are most likely to do a sloppy job and have a mess.


Conclusion
Got lucky this time around! Henry's 877 when on fine, thick enough to be impressive and I believe I made the right product choice.

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* This post was last edited 11/26/20 06:30pm by Chuck .. *   View edit history


Chuck

Ed9824v

Agua Dulce, Calif. 70 mi N.E. of Los Angeles

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Posted: 10/20/20 06:59am Link  |  Quote  |  Print  |  Notify Moderator

Looking forward to the long term review.


Ed So.Calif
1950 Ford F1 street rod
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1998.5 Dodge 2500 4x4 Cummins,4.10 gears,turbo,trans,injectors,oil cooler,lockers,edge EZ, 35" BFG's, air dog lift pump etc.

cavie

Port Charlotte Fl/ Hindsdale MA

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Posted: 10/20/20 09:31am Link  |  Quote  |  Print  |  Notify Moderator

did mine two months ago. We can pray together.


2011 Keystone Sprinter 323BHS. Retired Master Electrician. Retired Building Inspector.

All Motor Homes are RV's. All RV's are not Motor Homes.

frankwp

Calgary, AB, Canada

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Posted: 10/20/20 09:39am Link  |  Quote  |  Print  |  Notify Moderator

Maybe I'm asking a dumb question, but what is "clacking"? Roof looks good!

* This post was edited 10/20/20 10:04am by frankwp *


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Lwiddis

Williams AZ area

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Posted: 10/20/20 10:12am Link  |  Quote  |  Print  |  Notify Moderator

Good work. I'll wager it performs fine for a number of years.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-parallel & MPPT, Trojan T-125s. TALL flag pole. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist14 yr. Army vet-11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


Chuck ..

Salem, Oregon

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Posted: 10/20/20 11:41am Link  |  Quote  |  Print  |  Notify Moderator

Sorry, not the best speller or writer. CAULKING

Good catch!

frankwp

Calgary, AB, Canada

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Posted: 10/20/20 12:30pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks, that makes sense. I though maybe it was some regional term or something.

NJRVer

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Posted: 10/20/20 02:00pm Link  |  Quote  |  Print  |  Notify Moderator

Did mine and posted in the other roof maintenance thread. I ordered a new cover for my refrigerator and that took well over a month because of backordered.

What I noticed about the Henry coating is it reflects the sun and heat a lot. Prior to coating my roof would dry out the morning dew almost as soon as the sun hit it.
With the Henry coating it will not dry out after an entire day. The water beads up into giant beads like when you wax your vehicle. I got mine just in time to beat the fall leaves coming off the trees.
I was going to coat the roof of my cargo trailer but too many leaves are dropping now and I don't want to have to try and pick them out as i go along.

jdc1

Rescue, Ca

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Posted: 10/20/20 07:56pm Link  |  Quote  |  Print  |  Notify Moderator

Use a blower to dry the roof....takes 5 minutes. And, use a "mini-roller" to apply the coating. You can control the flow better.

Walaby

Georgia

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Posted: 10/20/20 08:04pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like a decent product.

Nice job

Mike


Im Mike Willoughby, and I approve this message.
2017 Ram 3500 CTD (aka FRAM)
2019 GrandDesign Reflection 367BHS


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