Sika Concrete Primer is primarily formulated for sealing cementitious substrates to reduce the incidence of pin-holing before Sika Decothane roofing or balcony systems are applied. The rapid curing performance allows overcoating of Sika Liquid Applied Membrane (LAM) roofing systems after 30 minutes.
Primer on cementitious substrates for use with exterior applications of:
Cementitious substrates must be prepared mechanically using suitable abrasive blast cleaning or planing / scarifying equipment to remove cement laitance and achieve an open textured gripping surface profile suitable for the product system thickness. High spots can be removed by grinding. Weak cementitious substrates must be removed and surface defects such as blow holes and voids must be fully exposed. Repairs to the substrate, filling of cracks, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor, Sikadur and Sikagard range of materials. Products must be cured before applying Sika Concrete Primer.
All dust, loose and friable material must be completely removed from all surfaces before application of the product and associated system products, preferably by vacuum extraction equipment.
Prior to mixing all parts, mix separately Part A (resin) using an electric single paddle mixer or other similar equipment. Add Part B (hardener) to Part A and mix part A + B continuously for 3 minutes until a uniformly consistent mix has been achieved. When Parts A and B have been mixed. Using a forced action / rotating pan / electric double paddle mixer / trough type or other similar equipment (free fall mixers must not be used).
Gradually add the required granulometry of dried quartz sand and if required Sika Extender T. Mix for a further 2 minutes until a uniform mix has been achieved. To ensure thorough mixing, pour materials into another container and mix again to achieve a smooth consistent mix. Excessive mixing must be avoided to minimise air entrainment. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing. Mix full units only. Mixing time for A + B + quartz sand = 5 minutes.
Prior to mixing all parts, mix separately Part A (resin) thoroughly using an electric single paddle mixer (300–400 rpm) or other similar equipment. Add Part B (hardener) to Part A and mix Part A + B continuously for 3 minutes until a uniformly consistent mix has been achieved. To ensure thorough mixing pour materials into a clean container and mix again for at least 1 minute to achieve a smooth consistent mix. Excessive mixing must be avoided to minimise air entrainment. During the final mixing stage, scrape down the sides and bottom of the mixing container with a straight edge trowel or spatula at least once to ensure complete mixing. Mix full units only. Mixing time for A+B = ~4 minutes.
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
Follow data sheet instructions to apply.
Sika Concrete Primer is used within the following Sika systems:
See Data Sheets tab for System sheet downloadable PDF.
|Solvent based polyurea
|Brush, Roller, Squeegee
|~0.13 kg/m² per coat
|Wet Film Thickness (WFT):
|Dry Film Thickness (DFT):
Sika® Concrete Primer is designed for fast curing. High temperatures combined with high air humidity will increase the curing process. Mixed material in opened containers must be applied immediately.
In opened containers, the material will form a film after ~1 hour.
|After 30 minutes at 20°C. Apply an additional coat if more than 24 hours pass before coating.
|Cleaner / Thinner:
|Clean all tools with Thinner C
|12 months from date of production if stored properly in original, unopened and undamaged sealed container in a cool, dry location away from direct sunlight
|Available in 4.5 Litres