Product Data Sheet
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Sikalastic® EP Primer/Sealer

Two-component, Universal Primer.

Sikalastic® EP Primer/Sealer consists of two components: an epoxy resin (Part A), and an activator (Part B). In its wet mixed state, it is red in color.

  • Low odor, low VOC formulation
  • Compatible with most common substrate and flashing materials
  • Corrosion protection in industrial and marine environments
  • Enhances adhesion to a broad range of metallic substrates
  • Protects against migration of volatile bitumen or plasticizers
  • Easy application by brush or roller
Product Data Sheet
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Usage

Versatile primer for use with:
  • Sikalastic® RoofPRO Systems
  • Sikalastic® DeckPRO Systems
Suitable for use on most sound substrate surfaces where both a penetrative and surface-lying effect is required.  

Advantages

  • Low odor, low VOC formulation
  • Compatible with most common substrate and flashing materials
  • Corrosion protection in industrial and marine environments
  • Enhances adhesion to a broad range of metallic substrates
  • Protects against migration of volatile bitumen or plasticizers
  • Easy application by brush or roller

Packaging

1 gal. kit (0.75 gal. Part A, 0.25 gal. Part B)

4 gal. kit (3.0 gal. Part A, 1.0 gal. Part B)

Product Details

Product Information

Chemical Base

Epoxy

Shelf Life

12 months in original, unopened and undamaged sealed containers

Storage Conditions

Store dry between 40 °F and 95 °F (2–35 °C)

Condition material to 50–77 °F (10–25 °C) before using for ease of application.

Solid Content

92 % by volume

(ASTM D-2697)

Volatile organic compound (VOC) content

78 g/l

(ASTM D-2369-81)
Technical Information

Service Temperature

-22–176 °F (-30–80 °C) intermittent

 

Application

Application Information

Mixing Ratio

Component A : Component B = 3:1 (by volume)

PREMIX PART A BEFORE MIXING PARTS A & B TOGETHER.

Ambient Air Temperature

41 °F (5 °C) min. / 95 °F (35 °C) max.

Relative Air Humidity

80 % R.H. max.

Substrate Temperature

41 °F (5 °C) min. /  140°F (60°C) max.

Dew Point

Beware of condensation.
The substrate and uncured coating must be ≥ 5 °F (3 °C) above dew point.

Substrate Moisture Content

≤ 4 % moisture content Test method: Sika®-Tramex meter
No rising moisture according to ASTM (Polyethylene-sheet).

Pot Life

45 minutes

Waiting / Recoat Times

Before applying any recommended Sikalastic® resin on Sikalastic® EP Primer/Sealer, allow:

Ambient temperature

Mimimum waiting time

Maximum waiting time

Touch dry

50 °F

12 hours

72 hours

8 hours

68 °F

9 hours

72 hours

4 hours

88 °F

6 hours

72 hours

3 hours

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Ideally, membrane resin will be applied within 24 hours of primer application. Maximum primer exposure is 72 hours. Primer exposed longer than 72 hours, and primer exposed to water during curing and exhibiting a chalky appearance, must be reprimed. Deteriorated primer must be mechanically removed before primer reapplication.

 
Consumption

Coverage

Coverage:

250 ft²/gal. on non-absorbent smooth substrates.
200 ft²/gal. on prepared, dry concrete.
75-100 ft²/gal. on mineral surfaced modified bitumen.


Note: Rough, porous, or absorbent surfaces will require additional primer and will reduce yield.
Application steps

SUBSTRATE PREPARATION

All substrate surfaces shall be clean, dry and sound. Acceptable substrates include: sound concrete and masonry, wood and plywood, modified bitumen membrane, mineralized asphaltic cap sheet, asphalt and asphalt mastic, ferrous metals, galvanized, lead, copper, aluminum, brass, and stainless steel. Reference separate System Data Sheet for specific surface preparation requirements.

MIXING

Mix ratio is 3:1 (A:B) by weight and volume. PREMIX PART A BEFORE MIXING PARTS A & B TOGETHER.  Add Part B into Part A and mix with a mechanical mixer (Jiffy) at low speed. Avoid adding air into the primer during mixing. When fully mixed, the primer should be free from streaks and of a uniform red color. Do not break down kits into smaller quantities.

APPLICATION

Apply by brush or phenolic resin core roller at the recommended rate. Correct amount of primer will saturate the substrate and leave a slight film on the substrate top surface. Apply evenly without puddling.

CLEANING OF TOOLS

Remove wet primer with MEK, xylene, or oxygenated solvents. Once cured, primer can only be removed by
mechanical means. Strictly follow solvent manufacturer’s warnings and instructions for use.

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