*Sika Concrete Primer Formerly Quick Cure Primer

Please note, this product is now discontinued. Contact our Technical Team on 01462 421333 to discuss a suitable alternative.

Sika Concrete Primer is a two component, rapid curing, high solids, solvent based polyurea primer for cementitious substrates.

Depending on the system, this product has been superseded with Sika Sikafloor 155WN, Sika Sikafloor 151 and Sikafloor 150.

Best Uses

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.

• Very good bond strength to substrate
• Reduces the likelihood of outgassing from susceptible substrates
• Helps to stabilise substrates
• Easy to apply
• Can be filled with quartz sand and used as a scratch coat

Primer on cementitious substrates for use with exterior applications of:

• SikaRoof MTC
• Sikalastic roofing systems
• Sikafloor balcony waterproofing systems

Application

Preparation
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.

Scratch coat
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.

Primer
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.