Sikalastic® Rapid Cementitious Primer

Two-component Polymethylmethacrylate (PMMA) Resin and catalyst

Unopened products have a shelf life of at least 12 months.

Store products sealed in their original airtight container and in a cool, dry and frost-free place.  Direct sunlight on the containers should be avoided, including on site.  After removing some of the contents, reseal the containers so they are airtight.

Reference should also be made to the storage recommendations of the material safety datasheet.

1.08 g/cm³ White

+3°C min / +35°C max

The relative humidity must be ≤90%

Beware of condensation.  Surface temperature during application and cure must be a minimum of 3°C above dew point.

The substrate temperature must not be less than +3°C if a topping is applied to the surface.  Reaction problems can occur at lower temperatures.

+3°C min / +50°C max

The surface to be coated must be dry and ice-free.
The surface must be protected from moisture until the coating has hardened.

Substrates such as new concrete containing residual moisture can be coated provided they have set sufficiently and the substrate is properly prepared.

The material in opened containers should be applied immediately.

At 20°C, 3% catalyst the pot life is approximately 10 minutes

Note: Times are approximate and will be affected by changing ambient conditions.

Higher temperatures or greater proportions of Sikalastic® Rapid Catalyst will reduce reaction times, while lower temperatures and smaller proportions of Catalyst will increase reaction times.

The following table indicates the recommended amount of Sikalastic® Rapid Catalyst required to adjust the curing reaction to the temperature.

Substrate temperature in °C; required amounts of Sikalastic® Rapid Catalyst in % w/w (guide)

Return-to-service times are provided as a guide only and may vary as a result of conditions.  Newly installed balconies should be protected from exposure to heavy traffic by overlaying with an appropriate protective covering.  This is particularly critical where early access is needed by other construction related traffic.  Sika Liquid Plastics will not be held responsible for damage to balcony surfaces that results from failures to adequately protect newly laid areas. 

For further advice, consult Sika Liquid Plastics Technical Customer Services

Once the primer has hardened, apply a second layer and top with a little quartz sand (0.1-0.2 kg/m² at 0.2mm – 0.6mm) while the primer is still wet.  The sand topping creates the necessary key (roughness) for application of the mortar.

Never apply the topping to the first coat of primer.

The substrate must be sound, dry and free from loose or adhesion inhibiting material.  Paint, cement laitance,surface dressings, dirt and grease, etc., must always be removed completely.  Normally this will be achieved by shot blasting, milling or grinding (although any successful method is acceptable depending on the area being treated) and then vacuum and clean off the residue.  High Pressure water jetting can work, in so far as removing some forms of contamination, but may, depending on the substrate, add more moisture to the substrate which will need time to dry out.

Please refer to the Sikalastic® Rapid Method Statement for further information on substrate preparation.

The primer must only be applied to a prepared substrate.   Please refer to the Sikalastic® Rapid Method Statement for further information on substrate preparation.

Use a twin-paddle stirrer to mix the product.

First stir the tub contents thoroughly.
Then add the Sikalastic® Rapid Catalyst while stirring the resin at the slow speed setting and mix for 2 minutes.  Make sure that the product on the base and sides of the container is mixed in.

At product temperatures <10°C the product should be stirred for 4 minutes,as the catalyst will take longer to dissolve.

Sheepskin roller
Brush (only for areas not accessible with roller)
Use the sheepskin roller to apply an even film-forming coat of primer.  Avoid creating puddles of primer.
Once the coating has cured, apply a second coat to cover any defects (bubbles, areas not fully coated).

If work is interrupted or when it is completed, clean the tools thoroughly with Sikalastic® Rapid Cleaner within the pot life of the material (approx. 10 minutes).  This can be done with a brush.  Do not use the tools again until the Cleaner has evaporated fully.
Simply immersing the tools in the Cleaner will not prevent the material hardening.