Service Bulletin | Due to recent improvements in both the Liquid Roof and Liquid Rubber we have improved the cure time greatly. By doing this we have noticed a shorter pot life after the catalyst is incorporated into the base material. Once the catalyst is added the reaction period begins. The working time to apply Liquid Rubber and Liquid Roof is between two hours and four hours depending on the temperature. The higher the temperature the shorter the working time. Once the catalyst is mixed into the EPDM it must be used. Pro Guard does not warrant catalyzed product that is not used within the proper time frame.

EPDM SuperCoat

Professional EPDM Supercoat® F9951

Professional EPDM SupercoatTM is a catalyzed liquid applied EPDM Rubber Coating that cures at ambient temperatures above 50°F. The coating can achieve dry films up to 40 mils in a one coat application. The physical properties of Professional EPDM SupercoatTM have been optimized for cure, adhesion to many substrates, tensile strength and surface properties including solar reflectance.

Professional EPDM Supercoat is the culmination of over 20 years of Liquid EPDM Coating development. Recent breakthroughs in raw material development have greatly enhanced the attributes of this coating.

> Superior Weathering

> Chemical and Ponding Water Resistance

> Wide Temperature Range

> One coat application

> Ideal coating for almost any type of substrate

One coat application on Substrates that do not need Proflex Primer®

> EPDM, TPO, PVC and Hypalon Membranes

> Coil Coated and Galvalume Metal

> Concrete & Brick

Substrates that require Proflex Primer®

> Built up Asphalt flat roofs

> Modified Asphalt Roll Roofing

> Cold Applied Asphalt Coatings

> Fiber Cement and porous Composite Materials

Additional benefits provided by Professional EPDM SupercoatTM

> Excellent corrosion protection of steel in humid, marine and chemical environments.

> May be used as a tank liner for vessels containing acidic or basic liquids of less than 50% concentrations.

> Indefinite resistance to ponding water.







Chemical Description Ethylene, Propylene Diene Monomer Rubber Cure System Two component Peroxide initiated

Weight/gal 8.37 pounds (w/catalyst)

Volume Solids 65.66%

Tensile Strength 1085 psi

Fresh Heat Aged

Elongation at break 62% 63%

Modulus at 50% 957 psi 970 psi

Shore D 20

Shore A 74

Spread Rate 47 sq. ft. /gal at 20 mil dry film

Permeability to water 0.1 perm

Weatherometer pass 3000 hrs. (ASTM D4459-8-03)

Peel Adhesion 8.2 pounds per linear inch on EPDM

Chemical Resistance Cured coating resists alcohols, keytones, polar solvents,

phosphates, Skidrol, acids and alkali solutions in less than

50% concentrations

Pot Life 3-6 hrs. depending on temperature

Cure Rate 6 hrs. to touch; 20 hrs. to walk on @ 70°F.

Thinner Xylene, Naptha, Mineral Spirits

Brittle Point -62°F

Heat Resistance 302°F (150° C) continuous exposure

VOC 252 gr/liter (2.1 lb/gal)

The physical properties of EPDM SUPERCOAT have been optimized for cure rate, adhesion, and tensile strength. The one property which had to be compromised is elongation. At 63% the elongation is adequate for most types of substrates. Special consideration, however, must be given to large metal roofs which can experience considerable expansion movement. The following procedure should be followed to allow for movement on large metal roofs without creating stress failures of the EPDM SUPERCOAT.

Step 1 Treatment of slip joints

Wire brush joints to remove any accumulated dirt.

Apply 3” wide Butyl Adhesive Tape ( In Seam Tape) centered over joint and roll for good adhesion. Leave release film attached.

Also, check flashing around penetrations and make repairs as needed using Butyl Tape.

Step 2 

Pressure wash roof and let dry.

Step 3

Remove release film from Butyl Tape. Airless spray apply EPDM SUPERCOAT first in one direction and then going over the same area at 90 degrees. Apply at a minimum spread rate of 47.5 sq. ft/gal. ( not diluted for spray ) for a 20 mil dry film ( see attached chart ) for other dry film and diluted material spread rates.

Step 4 Calculating material requirements:

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Step 5 Controlling Application

( Expanded surface area for most standing seam Metal Roofs is the Length x width x 1.2)

Mark roof into areas requiring one pail of SUPERCOAT


39.3 sq.ft. x 6 gal (20% diluted ) = 235 sq. ft. / pail gal

235 = 195 sq. ft. as length x width 1.2

Use a 6 gallon pail ( 5 gal SUPERCOAT plus 1 gal Xylene ) per 195 sq. ft. area ( length x width). This will produce a 20 mil dry film. The spray applicator must communicate with the pump tender frequently in order to monitor his spread rate.

Catalyst Control

It is very important to be able to verify that the catalyst was incorporated when Handling larger numbers of pails of SUPERCOAT. Apply a spray can mark or a piece of tape to every pail that had catalyst added. Catalyst and dilution solvent may be added simultaneously. An accurate record of the quantity of SUPERCOAT used on a job together with Batch Numbers is required in order to issue a warranty.

EPDM SUPERCOAT for TPO is specially modified to adhere to TPO without a primer. A clean and dry surface are the primary requirement. The following procedures should be followed in order to achieve optimum results from the EPDM SUPERCOAT for TPO.

1 .Carefully inspect roof and mark any areas on seams, penetrations and parapets that require repairs.

2. Perform repairs, following recommendations of the TPO manufacturer, where applicable and best roofing practice elsewhere.

3. Power wash the entire area to be coated using alkaline cleaner such as “Surface Preparation Cleaner” remove all surface deposits including mildew and algae.

4. Perform the following treatment at all transition points including penetrations, curbs, parapets etc. Apply a mixed coat of F1524/2 Proflex Base Coat to surfaces around transitions and let cure overnight or until the surface can be touched. Apply Butyl Adhesive tape bridging both sides of transition. Leave release film attached where practical until ready to topcoat.

5. Use following procedure on all seams:

Apply a single coat of F1524/2 using a 4” wide roller. This is in addition to any seam repairsperformed earlier.

6. The membrane is ready for the EPDM SUPERCOAT for TPO to be applied as soon as the F1524/2 Proflex has reached a touchable cured stage. Add catalyst to the EPDM SUPERCOAT for TPO and apply at a spread rate of 190 sq. ft. per 5 gallon pail. Mark off areas of 190 sq. ft. and make certain that one pail is used for each. Also mark the pail after the catalyst has been added. The above procedure will result in a 26 mil dry film of EPDM Coating.

Professional EPDM SupercoatTM now makes it possible to waterproof and protect ANY existing roof surface with the superior long lasting performance of a liquid applied seamless EPDM rubber membrane.

> Apply as a Liquid – Cures to a Seamless Membrane

> User Friendly – Field Applied in One Coat

> Recoats EPDM PVC & TPO Membranes & Metal

> True EPDM Rubber Membrane

> Highly Reflective – Energy Efficient – Environmentally Friendly

> One Coat Application to Achieve a 20-30 mil Dry Film

Only Available Through Select Distributors

Professional Low VOC EPDM SupercoatTM is available when a low VOC formula is required.

> Retains all the Properties of Original EPDM SupercoatTM

> Complies with SCAQMD & other Air Quality Districts VOC limits.

> Apply as a Liquid – Cures to a Seamless Membrane

> User Friendly – Field Applied in One Coat

> Highly Reflective – Energy Efficient – Environmentally Friendly

Only Available Through Select Distributors

Proflex Primer® is a unique, extremely flexible, two-component epoxy membrane. It is solvent-free and exhibits excellent tensile strength and elongation under ambient as well as colder temperatures.

> 100% Solids for Low Odor During Installation

> Less Hazardous.

> Self-Priming and Leveling on Properly Prepared Surfaces.

> Self-Leveling when Sufficient Material is Applied.

> Fills Depressions, Spalled Areas and Cracks.

> Absorbs Movement to Help Prevent Reflective Cracking.

> Remains Flexible Over a Wide Range of Temperatures.

This product will perform as claimed if directions are followed. Since we cannot control the conditions or methods of use, our warranty is limited to replacement or refund value of the product actually used. This warranty does not include labor or labor costs. Performance warranties are available through certified applicators.