Sikalastic®-504 Primer

12 months

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.

8.46 lb./gal. (1.01 kg/l)

Theoretical Coverage: 500 sq. ft./gal.

The volume mixing ratio is 1 part Part-A Black Liquid to 1 part Part-B White Liquid.

Sikalastic®-504 Primer should be applied the following way:

1. Apply Sikalastic®-504 Primer via a sprayer (Hudson-type agricultural, conventional pressure, or airless) at an application rate of 500 ft²/gal.
2. Use a 3–4 foot arc pattern.
3. Allow Sikalastic®-504 Primer to stand for a minimum of 15 minutes.
4. Clean EPDM with a commercial power washer (between 2000–3500 psi). When Cleaning the EPDM, it should be done slowly and close to surface in order to remove mica and inorganic release agents. In general, during the pressure washing of a roof, one part of Sikalastic®-504 Primer is diluted with 300 parts of water.
5. Rinse thoroughly with power washer. The rinse step may be done at a faster pace than the cleaning step. The final rinse water should be clear with no bubbles present.
6. The EPDM will range from muddy brown to black after washing with Sikalastic®-504 Primer.
7. When the surface is dry, coating can begin.