Sikalastic® P 255

Fast-curing polyurethane-based adhesive primer.

15 months

Store dry at 41–77 °F (5–25 °C) in a cool, clean, dry area.

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

630 cps*

* Cold temperatures will increase viscosity.

99%

30 min
 

Tested at 73° F (23° C) and 50% relative humidity. Warm temperatures will shorten pot life; plan work accordingly.

2−3 hours at 73 °F (23 °C) and 50% R.H.

250 - 300  ft²/gal

See preferred Sika Deck Coating Solution for total system yield.

Surface must be clean, sound and dry. Remove dust, laitance, grease, curing compounds, bond inhibiting impregnations, waxes and any other contaminants. All projections, rough spots, etc. should be dressed off to achieve a level surface prior to the application.

Concrete - Should be cleaned and prepared to achieve a laitance and contaminant-free, open textured surface by blast cleaning or equivalent mechanical means (CSP- 3 per ICRI guidelines). Sweep and vacuum any remaining dirt and dust with a wet/dry vacuum. Removing residual dust will help ensure a tenacious bond between the primer and substrate.

Before mixing, precondition both components to a temperature of approximately 70° F (21° C). Add entire contents of Part B to Part A. Mix both components with a slow-speed drill for a minimum of 3 minutes. Scrape down sides and bottom of mixing vessel, then mix again for 2 minutes. Keep the mixing paddle submerged during mixing to avoid adding air into the mixture.

1. Apply with medium nap phenolic core roller or squeegee at a rate of 250–300 ft2/gal (6.4–7.37 m2/L) or approximately 4 wet mils (0.1 mm).
2. Apply primer only to those areas that will be coated within 12 hours with ensuing base coat.
3. Minimum curing temperature is 40° F (4° C). Protect primed areas from rain and moisture.
4. Base coat may be applied over primer in 2–4 hours, depending on temperature and humidity. However, the primer must be tack-free prior to application of base coat.
5. Working time is approximately 30 minutes at 70° F (21° C). higher temperatures will shorten working time.

Please see the preferred Sika Deck Coating Solution for total system and aggregate surface preparation and application.