Product Data Sheet Show all documents

Sika® Bonding Primer

Two-component waterbased epoxy primer.

Sika® Bonding Primer is a two-component, water-based epoxy primer to consolidate substrates and enhance the adhesion of SikaRoof MTC®, Sikalastic®, Sikafloor® and Sikagard® products

  • Fast curing - overcoat possible after 1 - 2 hours
  • Long pot life - up to 12 hours
  • Low odour - water-based product
  • Consolidates dusty or friable surfaces
  • Uniforms the absorbency of the substrate
  • Enhances adhesion to a broad range of substrates
  • Easy application by brush or roller
Product Data Sheet Show all documents

Usage

Versatile primer for use with:
  • SikaRoof® MTC
  • Sikalastic® roofing systems
  • Sikafloor® balcony waterproofing systems
  • Sikagard® hygiene coatings
  • Suitable for use on concrete, masonry, tiles, insulation foams, bituminous surfaces, plaster, cementitious renders, screeds and mortars.
 

Advantages

  • Fast curing - overcoat possible after 1 - 2 hours
  • Long pot life - up to 12 hours
  • Low odour - water-based product
  • Consolidates dusty or friable surfaces
  • Uniforms the absorbency of the substrate
  • Enhances adhesion to a broad range of substrates
  • Easy application by brush or roller

Packaging

1.0 l (~1.03 kg) unit

0.8 l component A
0.2 l component B

5.0 l (~5.16 kg) unit4 l component A
1 l component B
15.0 l (~15.546 kg) unit12 l component A
3 l component B

Product Details

Product Information

Composition

Epoxy, waterborne and polyamine curative

Shelf life

24 months from date of production

Storage conditions

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.

Density

~1.03 kg/l  (23 °C)

(EN ISO 2811-1)

 

Application

Application Information

Mixing ratio

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

Ambient air temperature

+5 °C min. / +40 °C max.

Relative air humidity

80 % r.h. max.

Substrate temperature

+5 °C min. / +40 °C max.

Dew point

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

Substrate moisture content

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).

Waiting time to overcoating

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

Substrate temperatureMinimum waiting time

Maximum waiting time

+10 °C4 hours approx.

7 days

+20 °C2.5–3.5 hours approx.

7 days

+30 °C1 hour approx.

7 days

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

Substrate temperatureMinimum waiting time

Maximum waiting time

+10 °C24 hours approx.

7 days

+20 °C8 hours approx.

7 days

+30 °C

6 hours approx.

7 days

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

Consumption

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

Note: For metal substrates apply 1x Sikalastic® Metal Primer (0.20 kg/m2 approx.) 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.
Application steps

SUBSTRATE PREPARATION

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.

 

APPLICATION

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.

CLEANING OF EQUIPMENT

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

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