Technical Product Data
SmartFlash EP Primer
Two-Component work pack includes:
Component A: Base Resin, component B: Hardener
Product
Information
Product Use: SmartFlash EP Primer is used to prime a wide range of substrates including
bitumen roofing, concrete, brick, plywood, steel and glass. Adhesion test is required to confirm
adequate adhesion for aluminum, lead, copper or zinc. SmartFlash EP Primer is also used to
provide alkalinity protection for membrane surfaces prior to concrete or cementitious mortar/
adhesive application.
Limitations: Primer may be applied only when the ambient temperature is 50°F (10°C) or rising, and
the substrate temperature is a minimum of 5 degrees above the dew point. SmartFlash resin must
be applied to primer within 8 days of primer application. Primer exposed for more than 8 days must
be re-primed in accordance with CertainTeed Technical Department requirements.
Product Composition and Features: SmartFlash EP Primer is a solvent-free, two-part, cold-applied
liquid epoxy resin. SmartFlash EP Primer is a penetrating high bonding primer agent used between
acceptable prepared substrates and SmartFlash cold fluid-applied flashing systems.
Yield: 85 sq. ft. (7.9 m2) per work pack.*
* All yields are approximate and may vary depending upon smoothness and absorbency of substrate. On non-porous
substrates (i.e., metal), less EP Primer may be required.
Storage: Always store in cool and dry location. Do not store in direct sunlight or in temperatures
below 35°F (1.7°C) or above 80°F (27°C). Approximate shelf life 12 months with proper storage.
For best use, 24 hours before application, the material is to be acclimated at temperatures between
65°-70°F (18°-21°C).
Precautions: Refer to SmartFlash Safety Data Sheet (SDS) before using or handling.
Product
Application
Surface Preparation: All surfaces must be free from gross irregularities, loose, unsound or
foreign material such as dirt, ice, snow, water, grease, oil, release agents, lacquers or any other
condition that would be detrimental to adhesion of the primer and substrate. This requires careful
preparation of existing horizontal and vertical substrates; cracks are filled, expansion joints are
prepared, flashings are removed or modified, and termination points are determined. Substrates
and penetrations are prepared to SSPC-SP3 standards and may require scarifying, sandblasting or
grinding in some cases to achieve a suitable substrate.
Mixing of Primer: Note: Prior to opening the containers of SmartFlash EP Primer Resin, wear
appropriate safety glasses and protect hands and wrists by wearing gauntlet-type neoprene gloves.
Premix resin Component A thoroughly with a spiral agitator or stir stick. Pour resin Component B
into Component A and mix the components for approximately 2 minutes with a clean spiral agitator
on slow speed or stir stick without creating any bubbles or streaks. The resin solution should be a
uniform color, with no light or dark streaks present.
Primer Properties
Component Properties
Property
Component A
Component B
Physical Property
Values
Color:
Yellow
Brown
Color:
Translucent/Amber
Physical State:
Cures to solid
VOC Content:
8 g/l
Usage Time*:
25 minutes
Water Resistant After*:
6 hours
Physical
State:
Liquid
Liquid
Specific
Density:
1.10
0.95
Viscosity:
600
100
Solid to Walk on After*:
16 hours
Flash Point:
>284ºF/140ºC
>230ºF/110ºC
Apply Coating/
Surfacing After*:
16 hours
*Values obtained at 73°F, 50% relative humidity; may
vary depending upon air flow, humidity and temperature.
Installation: On porous substrates such as concrete, apply approximately 1.6 gallons (5.9 L) per
100 square feet (9 m2) to achieve substrate saturation. On non-porous substrates such as metal, up
to 0.8 gallons (3 L) per 100 square feet (9m2) of primer should be rolled or brushed evenly onto the
surface saturating the substrate in one application.
After applying primer, immediately broadcast with kiln-dried silica sand (0.4-0.8 mm) to refusal, at
the approximate rate of 50 lbs./100 sq. ft. (2.3 kg/m2).
When substrate moisture control is required, such as in cases of cinder fill concrete decks, on-grade
concrete slab applications and new concrete poured over metal decking, two coats of primer are
recommended, with the second coat to be applied immediately upon tack-free curing of the first coat.
Broadcast kiln-dried silica sand into the second coat only.
The squeegee application of a kiln-dried sand/primer slurry (2 parts mixing sand to 1 part primer) is
an acceptable alternative to a silica sand broadcast into the second primer application.
In hot weather applications, if the concrete substrate contains sufficient moisture and has an internal
structure that readily allows vapor passage, pin-holing of the primer may occur due to vapor pressure.
This will usually lead to blistering of the membrane. While this substrate condition is difficult to
predict, the application of primer in the late afternoon or early evening can often eliminate vapor
pressure-related pin-holing. In severe instances, a second application of primer or a squeegee
application of sand/primer slurry may be necessary.
Allow to set approximately 16 hours prior to application of the SmartFlash resin. Note: SmartFlash
resin may be applied when the primer is completely dry and without tack. Do not apply SmartFlash
resin to tacky or wet primer.
Alkalinity Barrier
Disposal
After the primer is thoroughly mixed, apply approximately 1.4 gallons (5.3 L) per 100 square feet
(9 m2) in one heavy or two light coats. The primer should be rolled or brushed evenly onto the
surface, completely coating the membrane. After applying final application of primer, immediately
broadcast with kiln-dried silica sand (0.4-0.8 mm) at a rate of 50 lbs./100 sq. ft. (2.3 kg/ m2).
Cured SmartFlash EP Primer may be disposed of in standard landfills. This is accomplished by
thoroughly mixing all components. Note: Uncured SmartFlash EP Primer Resin is considered a
hazardous material and must be handled as such, in accordance with local, state and federal
regulations. Do not throw uncured resin away.
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