
Sikalastic®-502 Primer
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Two component, liquid applied, solvent based Epoxy primer with unique penetrating characteristics.
- Substrate Penetrating
- Low Viscosity
- Quick Cure/Re-coat Time
Usage
Versatile primer for use with Sikalastic®-500 RoofCoat SystemsSuitable for use on:
- Concrete
- Metal
- Wood
- Polyurethane Elastomeric Surfaces
Advantages
- Substrate Penetrating
- Low Viscosity
- Quick Cure/Re-coat Time
Packaging
2 gal. (7.6 L) kit and 10 gal. (37.8 L) kit
Part A: 1 gal. (3.8 L), 5 gal. (18.9 L)
Part B: 1 gal. (3.8 L), 5 gal. (18.9 L)
Color
Part A: Black
Part B: White
Product Details
Chemical Base
Two component epoxy
Shelf Life
12 months in unopened container
Storage Conditions
Keep containers closed and store in a dry, cool place away from direct sunlight, heat, sparks, open flame, and moisture. Keep material stored above 65 °F (18 °C). Open containers should be blanketed with dry nitrogen before resealing.
Density
Part A: 1.30 kg/l
Part B: 1.89 kg/l
Solid Content
90 % by weight | (ASTM D-2369) |
84 % by volume | (ASTM D-2697) |
Volatile organic compound (VOC) content
93.9 g/L | (ASTM D-2369-81) |
Viscosity
|
Application
Mixing Ratio
Part A : Part B = 1:1 (by volume)
Ambient Air Temperature
41 °F (5 °C) min. / 104 °F (40 °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
60–90 minutes (at 75 °F (24 °C) and 50 % R.H.) |
Waiting / Recoat Times
Allow primer to cure completely prior to applying membrane resin.
Full cure: 4 hours at 68°F.
Ideally, membrane resin will be applied within 24 hours of primer application.
Maximum primer exposure is 48 hours. Primer exposed longer than 48 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
1 gal/300 sq. ft. on non-absorbent smooth substrates.
1 gal/200 sq. ft. on prepared dry concrete.
Note: Rough, porous, or absorbent surfaces will require additional primer and will reduce
yield.
MIXING
Sikalastic®-502 Primer should not be diluted under any circumstance. The volume mixing ratio: 1 Part B white liquid to 1 Part A black liquid. Premix Part A and part B components separately using low speed (400–600 rpm) mechanical mixer and Jiffy paddle at slow speed to obtain uniform color (typically 30 sec), making sure to scrape the solids from the bottom and the sides of the pail. Add Part B to Part A pail. Mix the combined material thoroughly until a homogenous mixture and uniform color is obtained (typically 3 min.)
APPLICATION
Remove all contaminants, oil and grease from substrate. Sikalastic®-502 Primer should be applied at the rate of 1 gal. (3.8 L) (mixture of part-A & part- B)/200–300 ft2 (18.6–27.9 m). It can be applied using an airless sprayer, brush, or phenolic resin core roller. Allow Sikalastic®-502 Primer to become tack free before applying the coating. If Sikalastic®-502 Primer is allowed to dry completely, re-prime the surface before proceeding. Sikalastic®-502 Primer is sensitive to heat and moisture. Higher temperatures and/ or high humidity will significantly accelerate the cure time and decrease pot life. Use caution in batch sizes and thickness of application. Low temperature and/or low humidity extend the cure time.