Sikalastic®-500 Acrylic Primer AP

Water-based acrylic

12 months

The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C.

Always refer to packaging.

80 % maximum

Beware of condensation. The substrate and uncured applied roof material must be at least +3 °C above dew point to reduce the risk of condensation on the surface finish.

≤ 6 % parts by weight.

The substrate must be visibly dry with no standing moisture.

The following test methods can be used: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene sheet).

30 minutes

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

0.2–0.3 kg/m²  per coat

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.

GENERAL

• Substrates must be free of standing water (no puddles) clean and free of all contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.

• All dust, loose and friable material must be completely removed from all surfaces before application of the Product, and associated system products, by industrial vacuuming equipment.

• To confirm adequate surface preparation and Product adhesion, carry out a small trial before full application together with adhesion tests.

CEMENTITIOUS SUBSTRATES

• Substrate must be sound with a minimum tensile adhesion strength of 1.5 N/mm², clean, dry and free of all contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.

• New concrete must be cured for at least 28 days and have a tensile strength > 1.5 N/mm².

• Cementitious substrates must be prepared mechanically using substrate preparation equipment to remove cement laitance and achieve an open textured gripping surface profile suitable for the product 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 joints, 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 Sikalastic®-500 Acrylic Primer AP.

BRICK AND STONE

• Mortar joints must be sound and flush pointed.

• Replace loose bricks, stone and mortar.

• Thoroughly clean the surface by power washing and allow to dry.

UNGLAZED CERAMIC TILES

• Ensure all tiles are securely fixed.

• Replace any broken, loose or missing sections.

• Thoroughly clean the surface by power washing and allow to dry.

CLAY TILES

• Ensure all tiles are securely fixed.

• Replace any broken, loose or missing sections.

• Thoroughly clean the surface by power washing and allow to dry.

Product is supplied ready to use

IMPORTANT

Avoid over-mixing to minimise air entrainment. 

Before application, mix for at least 1 minute or until the liquid is uniform.

Note: Use an electric single or double paddle mixer (300–400 rpm) with spiral paddle for mixing.

IMPORTANT

Protect from rain

After application, the product must be protected from heavy rain or rain showers until dry to prevent surface damage.

1. Apply Sikalastic®-500 Acrylic Primer AP to the clean substrate with roller or brush.
2. Allow to dry until clear film appears.
3. Primer is dry when all milkiness disappears.
4. In the case of very porous substrates apply a second coat.
   Note: Always confirm waiting / overcoating times have been achieved and the surface is totally dry without pinholes before applying successive coats of products. Remove surface water between coating applications.