Sikalastic® EP Primer/Sealer
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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
Usage
- Versatile primer for use with Sikalastic® RoofPRO Systems
- Suitable for use on most sound substrate surfaces where both a penetrative and surface-lying effect is required
- Acceptable substrates include · sound concrete and masonary · wood and plywood · modified bitumen membrane · mineralized asphaltic cap sheet · asphalt and mastic · ferrours metals · galvanized · lead · copper · aluminum · brass · stainless steel · Sarnafil® membranes · Sikaplan® membranes
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)
Color
Red
Product Details
Chemical Base
Epoxy
Shelf Life
24 months
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 by volume
| 92% | (ASTM D-2697) |
Volatile organic compound (VOC) content
| 78 g/l | (ASTM D-2369-81) |
Adhesion in peel
Adhesion tests should be completed at a minimum of 72 hours after application. Sikalastic® EP Primer/Sealer may take 1 week to reach final adhesion strength depending on temperature and other climate conditions. Refer to adhesion test protocol on the Sika website.
Service Temperature
-22–176 °F (-30–80 °C) intermittent
Application
Mixing Ratio
Component A to Component B = 3 to 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.
Dew Point
Beware of condensation.
The substrate and uncured coating must be ≥ 5 °F (3 °C) above dew point.
Substrate Temperature
41 °F (5 °C) min. / 140°F (60°C) max.
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 | |
| 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.
Coverage
Coverage:
200 - 250 ft²/gal. on non-absorbent smooth substrates
150 - 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
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 to 1 (A:B) by 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 for 3 minutes. 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 solvents. Once cured, primer can only be removed by
mechanical means. Strictly follow solvent manufacturer’s warnings and instructions for use.