Roof Coating Comparison

Below you will find the technical specifications of Armor Roof Shield versus popular water based and elastomeric roof coatings. The difference is plain to see. Armor Roof Shield is NOT an elastomeric and is made to provide a much longer useful life span than lower cost low quality retail grade products.

These types of retail grade roof products utilize water and or silicone as the main component of their formulation which are much lower grade materials versus our Copolymer Epoxy Rubber based coating. Water based and silicones always breakdown prematurely regardless of how exaggerated a guarantee maybe marketed. The trade off in the lower cost materials(especially water) is in lower performance in key categories as you can see in the chart below.

Almost no other roof coating company provides ASTM-Accelerated Weathering test verification meaning that any claims to longevity is just marketing hype. Armor Roof Shield passes the ASTM 9000 Hr accelerated Weathering test with no signs of degradation. Armor Roof is an industrial grade roof coating that can be applied by even first timers with professional, energy saving, leak stopping results that will last. Our roof coating will assure you one of the lowest cost of ownership(cost/years of useful life) over the long term.

Company ArmorGarage Gaco ELastek Lexis Coatings Henry Gardner-Gibson
Product Armor Roof Shield GR 1600 Solar Extreme 120 Energy Guard HE280DC Black Jack 1000
Product Type Copolymer Epoxy Based Silicone Water Based Elastomeric Butyl Elastomeric Water Based Acrylic Elastomeric Water Based Siliconized Acrylic
Coverage 100 sq ft/gal ^ 100/gal 100 sq ft /gal 30-35 sq ft /gal 30-35 sq ft /gal 40-50 sq ft /gal
Dried Thickness 22 Mils ^ 22 mils 20 Mils 20 Mils 11 Mils 10 Mils
Density 9.85 lbs/gal No Data 10.6 lbs/gal 7 lbs/gal 12 lbs/gal 11.53 lbs/gal
Tensile Strength 1000 psi 300 psi 340 psi 1000 psi 240 psi Up To 250psi
Hardness 60A 50A No Data 45A No Data No Data
Elongation 500% ^ 150% 260% 900% 230% Up To 350%
Cure Time @ 70 Degrees 24-48 hrs 24 hrs 24-48 hrs 24-48 hrs days 2-3 days 24-48 hrs days
Vapor Transmission. See note below .025 perms .06 perms 2.0 perms 5.9 perms 7.0 perms No Data
One Component Product Yes NO Yes Yes Yes Yes
Primer Required No Sometimes No YES YES No
Ponding Water Rated Yes Yes No Yes No No
Able To Walk On Yes No No Yes No No
Application Temperature Down To 40 F Down To 32 F Down To 55 F Down To 45 F Down To 50 F Down To 70 F
Energy Star Rated Yes YES Yes Yes Yes Yes
Refelectivity 90% 85% 86.5% 85% 88% 90%
UL Fire Rated Yes Yes No No(Flammable Liquid) Yes Yes
Guarantee 15 Yrs ^ 50 Yrs 7 Yrs *10 Yr 10 Yr 10 Yr


^Gaco Notes - Coverage: On textured surfaces such as all asphalt base roofs Gaco will require 3-4 coats. Actual coverage on textured surfaces is 33 SF/Gal. You will need substantially more product.

  • Guarantee- Gaco does not guarantee their product unless installed by an authorized Gaco installer. Furthermore Gaco does not Guarantee results of application such as stopping leaks. Guarantee is void if roof coating is walked on or strict maintenance not done. Also Gaco does not provide any ASTM Accelerated Weather Testing to verify Longevity. Guarantee is nontransferable.
  • Tensile Strength- Very Low should not be walked on.
  • Hardness- 50 rating is exponentially softer than Armor Roof's 60 rating. Armor Roof can be walked on whereas Gaco cannot be.
  • Elongation: Very low, may be subject to cracking in extreme conditions.

  • Vapor Transmission or Permeability- Perhaps the most important factor of all, whereas the lower the rating the better the coating resists water and vapor transmission. Armor Roof Coat is four times less Permeable than Liquid Roof and multiple times better than the rest. Simply put, it means Armor Roof Coat is far superior at preventing water and moisture transmission through your roof! Some roof coatings have ratings that are barely below the threshold where moisture will penetrate them. With these coatings just a tiny bit of wear will cause them to start leaking. Black Jack 1000 is not approved for use on Flat Roofs.

    Application Temperature: An important factor to keep in mind, this is the temperature at which the coating stops curing and is vulnerable to rain and or not having the curing process restarting. The same holds true for the curing time, until the coating is fully cured it is vulnerable to being washed away. We receive many calls from customers who had other popular brands just washed right off their roofs.

    *Gaurantee-10 Yr only when applied by certified Lexis applicator.

    ~EPDM Coatings, Liquid Roof and Pro Guard are the same product and therefore have the same specifications.


    The following is an explanation of the data you saw in the comparison chart regarding Harness, Tensile Strength and Elongation. It's important that you understand what these numbers mean so you know what level of performance you will be getting. Not knowing these numbers is really buying blind. If you need help in understanding all this data please feel free to give us a call or send us an email.

    Hardness: This is an indication of how much wear & tear resistance a coating has, the higher the rating the better. Armor Roof Coat is as tough as nails and has the highest hardness rating. It means it is far more resistant to wear than lower rated coatings. Some coatings void the warranty or require an inspection after you walk on your roof. Any roof coating with a Hardness rating of 50 or lower cannot be walked on without the risk of damage. We recommend using our Granule version around areas that are walked on more than a couple of times a week. Even if you don't walk on your roof you should be concerned about wear. Rain contains lots of particles that it pulls from the air that are very abrasive and corrosive and along with the Sun(UV rays) is what produces that faded worn out look in standard roofs and roof coatings. As you can see Rood Coat has the highest hardness rating, each 5 points in hardness is an exponential difference. Plus we are one of only a few that pass the ASTM 9000 HR Accelerated Weather testing. We strike a great balance between hardness, durability and flexibility making Roof Coat extremely versatile so that it will wear like iron while not cracking or splitting during extreme weather conditions.

    Tensile Strength & Elongation are critical factors as to how much Stress, Expansion and Contraction a coating can withstand before failing. Most other coatings are significantly below Armor Roof Coat. In areas with wide seasonal temperature swings most other coatings are very prone to failure. Ames rating is based on use of Polyester Contouring Roof Fabric(additional labor and material costs).

    Elongation: Based on ASTM D-412 test tells you how much can the coating stretch before cracking, at 500% we offer plenty of expansion capability and with 99.999% memory retention! Flexibility is no good if the coating doesn't return to its original dimensions. Most coatings will stop returning to their original dimensions after a relatively low amount of expansions and contractions! Then they start leaking because their pores have been stretched past the water repelling point. Then when you look for the source of the leak you will never find it because the the roof is leaky right through the microscopic pores of your bargain roof coating.

    Tensile Strength: We have found through extensive testing that 1000psi of tensile strength is needed for a coating to both perform at it's optimum and to be able to survive the high stress demands encountered on roofs. If a coating isn't strong enough it will simply break down and cease to perform. It's that simple

    With commercial roof coatings the saying you get what you pay for is very appropriate. Bargain priced coatings have only one superior feature they offer you cost savings albeit for only a short time until you have to redo your roof cause it's leaking again.