Sika® Bonding Primer

Epoxy, waterborne and polyamine curative

24 months from date of production

The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +25 °C.
Higher storage temperatures may reduce shelf life of product.
Reference shall also be made to the storage recommendations within the safety data sheet.

Component A : Component B = 4 : 1 (by volume)

+5 °C min. / +40 °C max.

80 % r.h. max.

Beware of condensation.
The substrate and uncured coating must be ≥ 3 °C above dew point.

+5 °C min. / +40 °C max.

Visible damp free (maximum 18 % wood moisture equivalent)
≤ 6 % pbw moisture content Test method: Sika®-Tramex meter
≤ 4 % CM - measurement or Oven-dry-method
No rising moisture according to ASTM (Polyethylene-sheet)

Before applying any recommended SikaRoof® MTC, Sikalastic® and Sikafloor® products on Sika® Bonding Primer, allow:

Before applying Sikagard® products on Sika® Bonding Primer allow:

Note: Apply an additional coat if more than 24 hours pass before coating.

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

Apply in one to two coats, with a consumption of 0.10 kg/m² approximately per coat depending upon surface roughness and absorption.

Note: For metal substrates apply 1 x Sikalastic® Metal Primer (0.20 kg/m² approximately) instead of Sika® Bonding Primer (please refer to Sikalastic® Metal Primer Product Data Sheet for further information).

These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.

The surface must be sound, of sufficient strength, clean, dry and free of dirt, oil, grease and other contamination. The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum pull off strength of 1.5 N/mm².

All surfaces to be coated should be thoroughly cleaned by conventional means.
Inspect the substrate.
Spalling, flaking or damaged areas should be repaired using compatible materials to match surroundings or replaced as necessary.
If in doubt apply a test area first.
Tiles have to prepared mechanically, glazing has to be removed.
Grinding may be necessary to level the surface.
For detailed information regarding substrate quality / preparation and primer chart please refer to Method Statement.

Prepare Sika® Bonding Primer by adding component B into component A container, mix with an electric drill until a homogeneous light green colour is achieved and the product is free of streaks. The 1 L packaging can be mixed by spatula or flat stick.
Sika® Bonding Primer can be applied by short-piled roller, brush or airless spray.
Allow primer to dry sufficiently (see table waiting time / overcoating) before overcoating.

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