Elastomeric Roof Coatings

How To Apply Elastomeric Roof Coating

Elastomeric acrylic coating system are an economical alternative to a costly re-roof. Advances in polymer chemistry have resulted in elastomeric coatings that provide lasting restoration, retrofit or repair. This liquid applied membrane completely bonds to the surface as it dries, yet remains elastomeric. It stretches as the substrate moves. And then returns to its original shape without deformation.

Elastomeric coatings are versatile, easy to apply and repair lightweight and watertight. When you use a quality product like APOC, Henry or others which are manufactured with strict quality control, you can count on quality that's consistent batch to batch. Many are also energy star rated and independently tested to EPA guidelines, with results of initial solar reflective values up to 86%, and three year aged values up to 72%.

Professional roofing contractors favor acrylic coatings for long-term performance and ease of application without the use of fabrics. Before making use of a new roof coating, a field representatives will walk the roof with you and will provide warranty inspections for system warranted projects. Then the following steps will be followed: power wash, prime, flash, and finish.

You can go here to learn more about Liquid Applied Membrane Roofs

Power washing the roof

Before power-washing, prep and clean the roof surface. Start by removing all loose coatings, old brittle patching materials, and soft or active roof cements. Any areas with excessive rust should be cleaned with a wire brush. If heavy debris or loose dirt exists, broom the surface.

Now you are ready to power wash, either with water alone or using a mixture of specifically designed roof cleaning solution.

This step effectively removes existing oil, dirt or grease that would adversely affect the bonding of acrylic coatings.

For a roof without gutters, remember to wet the side of the building first, to prevent cleaning runoff from discoloring the exterior. After completing the power washing, visually inspect the exterior walls and rinse as needed.

Prime the roof surface

Apply a metal roof primer to the clean dry roof. A primer is required for coating rusted or bare metal, and for all projects obtaining a labor and material system warranty.

Check weather conditions first. Do not apply if weather conditions will not permit complete cure before rain, dew or freezing temperatures.

Use a modified acrylic primer exhibiting excellent adhesion and corrosion resistance which provides re-coat ability and durability in a single component primer. The primer totally encapsulates existing rust and inhibits the development of new rust, while it maximizes the adhesion of your elastomeric coating.

A typical primer will be applied at a rate of one half gallon per 100 square feet. A brush is suitable for details and flashings. A roller may be used for coating small flat areas. For large areas, airless spray equipment is recommended using a tip size of .015 to .027 inch diameter, with a wide angle fan pattern.

Thoroughly mix the primer prior to application. After installation, there should be no visible rust. If more product is required to cover rust, additional coats should not exceed one half gallon per 100 square feet. Applying a primer at higher coverage rates in one coat can result in surface splitting or blistering, due to trapped moisture. A 12 hour cure time is recommended between coats and multiple coats should always be applied within 72 hours of each coat. This minimizes the chance of contamination that would require additional cleaning. Cool temperatures and high humidity are factors that may retard curing, which can result in longer cure times between coats.

For application in high temperatures above 90 degrees Fahrenheit, it is recommended that applications be done in multiple thin coats to prevent trapped moisture problems that can cause splitting and blistering.


When the primer has cured apply flashing grade to seal fasteners, panel seams, penetrations and end lap joints. But remember, do not apply if weather conditions will not permit complete cure before rain, dew or freezing temperatures.

Apply by brush or extrude, and cover with a minimum of 1/8 inch thick coat. Make sure all vents and other metal flanges are properly secured to the roof deck before applying. Areas that need a build-up of product thicker than an eighth of an inch should be applied in multiple coats to prevent trapping of moisture, which could cause splitting or blistering.

When working on open seams and end lap joints, make sure to back brush. Flashing grade sealant will skin over in approximately two hours, depending on temperature and humidity. If additional product is required a minimum of 24 hours is recommended between coats.

Finish - Applying the elastomeric coating to your roof

The final step is to coat with your quality elastomeric roof coating. Again do not apply if weather conditions will not permit complete cure before rain, dew or freezing temperatures.

Apply by brush for details and flashings and a roller may be used for coating small flat areas. For large areas, airless spray equipment is recommended using a tip size of .025 to .035 inch diameter, with a wide angle fan pattern.

Thoroughly mix your coating material prior to application. Apply the first coat at a rate of one and one half gallons per 100 square feet. Coating thickness can be tested using a wet mil thickness gauge. The coating should be 24 wet mils thick per coat. When dry, you will achieve a dry mil thickness of 13.2 mils per coat.

Allow approximately 12 hours curing time between coats, or enough time so that the product is sufficiently dry that foot traffic will not damage the coating.

Apply the second coat at a rate of 1 1/2 gallons per 100 square feet. The finished roof is now coated with a total of three gallons per 100 square feet and is ready to deliver years of trusted performance.

Elastomeric Coating: Tried And Tested Tips


okay so when it comes to elastomeric coding there's a lot of different options out there the one we like here at twin home experts that's truly been tested with all of the jobs that we've done is going to be the sure coat systems now you've seen a lot of our videos to do elastomeric coatings on roofs while this one is their structure coat specifically made for stucco one of the products that we really like using first to prep is going to be the sure scrub this is basically soap go in pressure wash the surface of the old structure de-grease remove and get a better application but what I love about sugar coat systems is the fact that the staff if there's questions the support is right there at your fingertips you simply dial them up someone's gonna answer they're gonna take care of your issues if there's any issues on the job site you're going to get that support unlike other competitor elastomeric coating manufacturers the other benefit with this here and it actually shows it right here it's 80 percent eighty six percent thermal emittance you've got protectants again heat saves money and energy protects against moisture the building that we're doing right behind us right now had moisture issues we've actually tested this out on the front of the building which had a lot of exposure to rain it stopped everything it does a great job with them what I wanted to offer you now is what does sure coat cost well a five gallon bucket of shirt coat is gonna be around two hundred to two hundred and ten dollars for five gallons it's gonna cover about a hundred and thirty-five square feet it does give you two coats with that coverage that I just expressed you sure scrub about thirty dollars for for this size right here then you got to consider your rollers and paintbrushes and all the plastic and tapes got to factor that in as well let's go ahead and take you to the building here and we'll show you some tips and tricks that way so one of the tips that you might want to consider before you start applying elastomeric coding is to really do a detail job in protecting the windows the pathway such as sidewalks the staircase you can just see right above me the rails as well as the pathway here this is six six mil the reason why we use six mil here is because it does offer not only protection but it's not going to tear and rip if it's a high-traffic area you might want to consider more of a painters drop cloth so that way nobody slips in this case we're just taking care of this today so this will be removed again strong tape so good sticky tape on some of these areas is a must if not the stuffs just gonna peel apart so again windows doors stairs floors you got to protect all that before you start applying it the other thing is is if you're going to run your elastomeric coating on your walls you want to make sure that you excavate down into the ground and bring the elastomeric coating into the soil the reason for that is because if the soil is is ends up at this elevation right here and you just painted it to this point you're going to end up getting some more water and throughs and going into the stucco and that starts to absorb as you can see here this doesn't have a weap screen so again this is the Elliott you really want to add a lot more elastomeric coating may be even consider doing three coats and these lower areas here just offers a little bit more protection alright let's go ahead now and go to some areas in the front of the building that are tall walls we'll show you what that looks like in respect to painting alright folks so here we are in front of the building with a 20-foot Eve here so what we like doing is we use about a four foot ladder and then the long 15 foot poles and as you can see makes it safe it's pretty easy to paint all right folks so now if you just pay attention to the roller you can see right here coming a little bit closer as you can see the hairs of the roller are not sticking out when it's flattened out like this this is a sign that you need to do another dip of the elastomeric all the way you want to dip your roller into a five-gallon bucket is just like this all right folks so one of the steps that you need to take before you start rolling on the walls is do all your cuttings around the windows doors in this case it's a mailbox so it's basically a four inch paintbrush and basically you're just gonna cut in all the way around windows and doors what this will allow you to do is be able to roll on the elastomeric coating be a lot more effective in covering everything so cutting in is very very important to all your windows and doors alright folks well hopefully you like this video