Sika® Bonding Primer

Water-based epoxy with a polyamine curing mechanism

24 months from date of production

The Product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +25 °C. Always refer to packaging.

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

+5 °C min. / +40 °C max.

80 % max.

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

+5 °C min. / +40 °C max.

The Product can be applied on substrates with a moisture content of ≤ 6 %.

The substrate must be visibly dry with no standing water.

The following test methods can be used to determine the substrate moisture content:

• Sika®-Tramex meter
• CM-measurement
• Oven-dry-method

Before applying SikaRoof® MTC, Sikalastic® or Sikafloor® products on Sika® Bonding Primer, allow:

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

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

~0,15 kg/m²/coat. Apply in 1 or 2 coats.

This figure 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.

IMPORTANT

Reference must be made to the Sika Method Statement: Sika® Bonding Primer

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.

• New concrete must be cured for at least 10 days.

• Prepare substrates using grinding equipment, high pressure power washer, manual or mechanical wire brushes.
• Damaged, weak or loose substrates must be removed and repaired with compatible materials.
• To confirm adequate surface preparation and Product adhesion, carry out a small trial before full application together with adhesion tests as required.

IMPORTANT

Over mixing must be avoided to minimise air entrainment.

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

Note:Mix full units only.

Mechanical mixing

Add Part B to Part A and mix Part A+B continuously for a minimum 3,0 minutes

Manual mixing

Note:The 1 l unit can be mixed manually.

Add Part B to Part A and mix Part A+B continuously for a minimum 3,0 minutes using a spatula or flat mixing stick.

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

Fleeced roller / brush application

1. Confirm product application conditions: substrate moisture content, substrate, air and product temperatures, relative humidity and dew point (Refer to Application Information).
2. Pour the mixed Product onto the surface.
3. Apply the Product evenly over the surface with a short-piled roller or brush. The consumption is specified in the Application Information.
4. Back roll the surface in two directions at right angles with a short-piled roller.
5. The primer must be continuous and pore free.

Airless spray application

1. Confirm product application conditions: substrate moisture content, substrate, air and product temperatures, relative humidity and dew point (Refer to Application information).
2. Spray apply the product in a continuous cross-spray operation and at a speed to achieve a consistent thickness and the required surface finish. The consumption is specified in the Application Information.
3. The primer must be continuous and pore free.

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