Sika Concrete Primer Lo-VOC

Moisture-cure polyurethane

12 months

Store dry between 41 °F and 77 °F (5–25 °C). Condition material to 50–77 °F (10–25 °C) before using for ease of application

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

80 % R.H. max.

Not for use on surfaces with condensation.
Air, substrate and uncured coating must be ≥ 5 °F (3 °C) above dew point.

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

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

45 minutes

30–45 minutes at 77 °F (25 °C) and 50 % R.H.. Lower temperatures will extend cure time.

Membrane resin should be applied within 24 hours of primer application. Maximum primer exposure is 72 hours. Primer exposed longer than 72 hours, primer exposed to water during curing and exhibiting a chalky appearance, must be re-primed. Deteriorated primer must be
mechanically removed before primer reapplication

350 ft2/gal. on non-absorbent smooth substrates.
300 ft2/gal. on prepared, dry concrete.
200 ft2/gal. on absorbent gypsum and cementitious cover boards.
Note: Rough, porous, or absorbent surfaces will require additional primer and
will reduce 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.
Plywood - Should be clean and smooth, APA and exterior grade, not less than 1/2” thick, and spaced and supported according to APA guidelines. Joints should be sealed with Sikaflex® 2c or 1a and detailed, and may need embedded fabric reinforcement. Maximum moisture content 4%.
Existing Coatings - Should be cleaned and mechanically abraded to provide a contaminant free, open textured surface. Followed by a solvent wipe or mop as allowed by state and local regulations. After solvent flashes off proceed with Sikalastic® Primer application.

No mixing necessary.

Apply by medium nap phenolic core roller or squeegee and backroll ensuring an even and consistent coverage. Ensure all excess material is removed by back rolling with no pooling or puddling of resin. Allow coating to cure ~45 minutes or until tackfree before proceeding with subsequent system. Primer must be overcoated within 72 hours, if this window is missed the primer must be abraded and solvent wiped followed by an additional coat of Primer before proceeding.

Removal
Remove liquid uncured resin immediately with dry cloth and do solvent cleanup. Once cured, resin can only be removed by mechanical means.
 

Clean all tools and application equipment with appropriate solvent immediately after use. Hardened and/or cured material can only be removed mechanically