Looking for Answers about Gardner 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating?

Customer questions and answers for
Gardner 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating

Sta-Kool 770 Ultra White Elastomeric Roof Coating is a tough, highly flexible, rubberized roof coating. This high-performance, 7-year warranted elastomeric roof coating resists cracking and peeling. The coating also provides a highly protective barrier which reflects the sun’s heat and destructive UV rays. This helps to cool roof surfaces and reduce interior temperatures. This product is an “investment” which can actually pay for itself in savings on cooling costs. Covers approx 50-75 sq. ft. per Gal. depending on porosity of the surface.
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Customer questions and answers for Gardner 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating

Question

I havbe aflat roof on my porck .it was put up in 3section i beleave the are alum. some one put tar on the seams this has cracked what can i do?

Asked by
donnie
fl
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
February 20, 2015
I put flexable rubber fill but dint work
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answer 1
Asked by
GardnerGibson
February 21, 2015
If you have a leak, it must first be repaired with a patching repair and reinforcement. The Sta-Kool 440 White Flash, is a thick flexible white patch that will seal cracks and stop leaks. After it is repaired, you can apply the Sta-Kool 770 Cool Roof Coating. Thanks for the question, and good luck with the project. We would love to hear how it turns our too!
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Question

how do i get this in a gray tint

Asked by
kevin
croton,ny
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
January 31, 2015
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answer 1
Asked by
GardnerGibson
February 3, 2015
Thanks for your question. A typical addition of 3-4 ounces per gallon of universal colorant can be added, which will result in light pastel colors. Please note that color tinting will disclaim warranty.
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Question

how mu area does it cover?

Asked by
plumblady
Toccoa, Ga
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
January 19, 2015
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answer 1
Asked by
GardnerGibson
January 20, 2015
Thanks for your question. Coverage rate is approximately 50-75 sq. ft. per gallon per coat. All the best to you on your coating project!
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Question

Can I apply Sta Kool to my fiberglass mat roof on my RV.

Asked by
Lawrence
Ventura CA
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
December 30, 2014
The original 20 year old paint type coating is gone and it is down to the matting. I pressure washed the roof and took all the built up growth off and it is now a fiberglass mat.
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answer 1
Asked by
GardnerGibson
January 1, 2015
Yes, thus product will bond to the existing clean deck. However, if it is a flat roof that collects water, consider our Eterna-Flex Silicone Coating as it is recommended with standing water. Thanks and good luck!
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Question

can this be use on a rubber roof???

Asked by
KAJG60
Albany NY
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
December 26, 2014
Can this be use @ what temp.?
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answer 1
Asked by
GardnerGibson
December 29, 2014
Thanks for the question. This product would not adhere to s rubber roof. Instead use Eterna--Kote Silicone Roof Coating. This should adhere to this type of roof. Good luck with your project.
Use the SK-770 at temps above 60 degrees.
Use the Eterna-Kote at temps above 45 degrees.
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Question

I have a building with a tar roof. Will this product work on that roof?

Asked by
madmax
Savannah, Ga.
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
December 20, 2014
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answer 1
Asked by
GardnerGibson
December 21, 2014
Thanks for the question. This product will coat over rolled asphalt roofing, but there must be positive drainage in all areas. If you have flat areas, you should instead use the Eterna-Kote Silicone+ Roof Coating, as this will work much better on those areas and give you lasting waterproofing protection. Good luck on your project.
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Question

What can I use to repair my mobile home carport synthetic rubber roof?

Asked by
Bruce
Bradenton, Fl
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
October 18, 2014
My carport synthetic rubber roof is showing wear. Can I use 'elastomeric roof coating on it?
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answer 1
Asked by
GardnerGibson
October 20, 2014
Thanks for your question. This is a tricky one since you didn’t specify what type of rubber roof that you have. We are attempting to reach out to you via email to get additional information. We’d love to assist you in securing the appropriate product to complete your project successfully.
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Question

Will product work on modified bitumen?

Asked by
DonR
Minneapolis, MN
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
September 27, 2014
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answer 1
Asked by
GardnerGibson
September 29, 2014
Yes, this product will adhere to Modified bitumen roofs.
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answer 2
Asked by
GardnerGibson
September 29, 2014
Thanks for your question. Yes you can use Sta-Kool 7-Year Ultra White Elastomeric Roof Coating on aged mod-bit roofs.
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Question

How can this product be used on a second story concrete patio that is walked on? Do I need to seal the concrete before application?

Asked by
steve
Austin Texas
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
September 25, 2014
I know it can be walked on but is there a protective coating that will help preserve it from traffic?
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answer 1
Asked by
GardnerGibson
September 29, 2014
Thanks for your question. Sta-Kool 7-year Ultra White Elastomeric Roof Coating is not approved for foot traffic.
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Question

Will this stop leaking on a steel Trails West horse trailer roof?

Asked by
HorseGirl
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
September 18, 2014
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answer 1
Asked by
GardnerGibson
September 19, 2014
Thank you for your question. You should repair all leaks and cracks with Sta-Kool 390 White Roof Patch and Universal Patching Fabric in accordance with product instructions.
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answer 2
Asked by
Gaylord
SLC Utah
November 30, 2014
Have neighbor who put it on metal shed, says it works great.
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Question

Is this title 24 compliant

Asked by
joeeee
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
September 10, 2014
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answer 1
Asked by
GardnerGibson
September 14, 2014
Yes
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Question

Will a primer be necessary before application of this product if the metal roof currently has rust on it?

Asked by
HandyGirl
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
September 1, 2014
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answer 1
Asked by
ncrrolfe
Escondido, California
Home Improvement Profile: DIYer
September 12, 2014
The STA-KOOL container states the prep work required, basically 1) clean; 2) patch and 3) protect.
Clean all dust, dirt, oil, loose gravel and peeling paint. Wire brush rusty metal and prime with metal primer/sealer before using this product. Patch any leaks with Elastomeric patching compounds. Finally apply the product on a sunny day.

I applied this product to an RV fiberglass roof with 4 or 5 thinner coats than what they say. But you need to make sure that the roof doesn't pool water or leak.
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answer 2
Asked by
GardnerGibson
September 2, 2014
Yes, prime all rust spots with a rust stopping primer.
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answer 3
Asked by
Draythomp
Arizona, USA
September 2, 2014
Like everything, it depends. If you have large flakes of rust, you need to scrape, sand, primer, etc. If the base you apply the paint to is flaking off, the paint will help because of its thickness and viscosity, but it wont get rid of the rust, it will still be there hiding, waiting to cause problems. A little light surface rusting shouldn't be a problem.

Clean the roof, dry it and then run a putty knife over the surface. If you get a bunch of stuff off, you have a lot more work to do.

You can look into paints specifically designed for handling rust as a first coat, then this stuff to protect and seal it for a long period.
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Question

Do you need to use primer first?

Asked by
AZKG
Phoenix
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
August 28, 2014
Do you need to use primer before applying sta-kool? I have an existing foam roof and am looking to re-coat it myself.
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answer 1
Asked by
DesigningWoman
August 29, 2014
Hello AZKG and thank you for your question.

The manufacturer of STA-KOOL (Gardner-Gibson) has instructions for Applying Elastomeric Roof Coatings including on urethane and polystyrene foam surfaces. You will to clear the roof of debris, clean with a pressure washer, patch and repair cracks and then reinforce the repairs with reinforcement fabric. You will then apply the STA-KOOL to a dry roof surface on a clear, warm and sunny day. Instructions can be found here: http://www.gardner-gibson.com/files....

This coverage calculator will help you determine how much to purchase: http://www.gardner-gibson.com/calcu....

Best wishes on your project.
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Question

Novel use -- will this product also deaden ambient sound ?

Asked by
canuck
BC
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
August 21, 2014
I'm thinking on using Sta-Kool 770 inside my car's metal wheel well cavities -- behind fender liners. Will the heft of this product also deaden sound -- like road noise? How many mm thick should it be applied?
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answer 1
Asked by
GardnerGibson
August 23, 2014
This is not the intended application, but it may help. You have to really clean the area well to get proper adhesion. Then apply product in multiple coat layers. Multiple coats is the only way you will be able to get a heavy build. Obviously we cannot guarantee the results, but you can try at your own risk.
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answer 2
Asked by
ncrrolfe
Escondido, California
August 23, 2014
My usage of this product was on a RV roof and is basically painting the roof, like you would paint your ceiling except I did five coats. I doubt there is any sound deadening with such a thin layer. It does cool the inside of the RV a lot compared to before.
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Question

Can this be used with a light reinforcing fabric.

Asked by
mijab
CA
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
July 24, 2014
Can this be used in conjunction with a light reinforcing fabric such as HD Stichbond ( Internet # 204719647)

Thanks
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answer 1
Asked by
ncrrolfe
Escondido, California
August 5, 2014
I'm not familiar with HD Stichbond but I use this product over a fiberglass repair. I was applying this product to my RV fiberglass roof when I was kneeling on the roof and one knee punched through the roof. I found the about 3/8" thick plywood was rotted it that area. So I cut out the rot between roof rafters and put new wood in about 2 square feet of plywood after first making the roof rafters thicker. I found the rafters were made of about 7/8" plywood, so I widened them in the area by some redwood 2X4 in a frame shape to give me a good base to attach the new plywood sheathing. Then went to a shop specializing it fiberglass products and bought a heavier glass fabric and applied resin from Home Depot. I use the STA KOOL product after using two coats of Zinser water base primer. I also use it over EternaBond (I believe it is called) at the end caps. It's been done for about a month so I don't know the success of the repair. Be sure you do all the sealing around end caps and vents first and wash the roof with TSP. After cleaning and dry I applied 5 thinner coats rather than 2 thick coats as recommended by my local RV repair shop.

Note that for my case since I wood rot because I didn't use this product sooner that I probably have wood rot in many places so I walk very carefully on the roof and step where I believe the roof rafters are. So day I will probably break through again and have to do another patch as explained above.
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answer 2
Asked by
GardnerGibson
July 28, 2014
It depends on the fabric, but this coating can be used with lightweight polyester or fiberglass. The fabric should be embedded in the first coat and then covered with a second coat of the product.
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Question

can this apply to a wood shingles roof ?

Asked by
Jack
West Covina, CA. 91790
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
July 16, 2014
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answer 1
Asked by
GardnerGibson
July 24, 2014
It is not recommended for this use.
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Question

WHAT IS TEMP RANGE TO APPLY?

Asked by
samdahandyman
KEYS 33050
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
June 5, 2014
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answer 1
Asked by
GardnerGibson
Tampa FL
Home Improvement Profile: Professional
June 10, 2014
Temperature range for application of this product is 65 degrees F and rising up to 100 degrees F.
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answer 2
Asked by
GardnerGibson
Tampa FL
Home Improvement Profile: Professional
June 10, 2014
This product can applied from 65 degrees F and rising up to 100 degrees F.
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Question

Can sta kool be used on aluminum RV roofs that have tpo tape applied

Asked by
RVTechie
hudson valley
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
May 14, 2014
I've placed a self adhering TPO/epdm seam tape to perimeter seams of a aluminum RV roof. There would be a 3" overlap from metal to tape.
Will the sta kool coating have an adverse effect on the seam tape
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answer 1
Asked by
GardnerGibson
Tampa FL
Home Improvement Profile: Professional
June 10, 2014
This product will not stick to TPO/EPDM, so it cannot be used in this application.
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Question

Can I apply this product on top of a previous application of Sta Kool 7-Year Ultra White Elastomeric Roof Coating, several years later?

Asked by
Western4545
Hillsboro, Texas
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
May 13, 2014
I originally put on this product 8 years ago. Can I apply it again on top of the same product?
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answer 1
Asked by
ncrrolfe
Escondido, California
August 5, 2014
I don't know for sure but I have about 40% left over and will apply in about three years instead of waiting 7 years to do it again.
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answer 2
Asked by
GardnerGibson
Tampa FL
Home Improvement Profile: Professional
June 10, 2014
You can, so long as the roof is washed clean and then allowed to dry before the application.
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Question

I used this on my camper roof and it worked well but I have lots left over. Can I use this on primed undercarriage of my Camper?

Asked by
Readytocamp
about 5-Gal. Sta-Kool 770 Cool Roof Elastomeric Coating on
May 6, 2014
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answer 1
Asked by
Draythomp
Arizona, USA
May 6, 2014
The problem is high speed wind and water hitting it and ripping part of the plastic like paint away. I am using my leftover paint for a lot of things that don't go 70 mph down the highway a foot off the ground. Things like the doors on the barn, some stucco areas that get a lot of beating from the sun and wind, concrete walls that need some help with the weather, etc.

I took the left over paint and put it in smaller buckets and stored it. This way I don't have to open the big one and let air in it to paint something else.

To see if it will hold up to the conditions, paint a bit of the inside wheel wells and then check it after a few trips.
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