Sikagard®-850 AG

• CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating
• Adhesion, Water Permeability and Water Vapour Diffusion tests EN 1542, EN ISO 7783, EN 1062-3, Sikagard®-850 AG, Applus, Test report No. 17/14156-666

EN 1504-2: Surface protection product for concrete - Coating

Polyorganosiloxanes polymer and solvent

12 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 +30 °C. Always refer to packaging.

< 140 g/l (calculated)

Sikagard®-850 AG must be thinned to the required application viscosity with white spirit. Refer to application instructions.

Dry film thickness (DFT) ~150 to 300 µm

These figures are theoretical and do 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.

+8 °C min. / +35 °C max.

< 80 %

Substrate and ambient temperature must be at least +3 °C above dew point

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

Note:Generally, 1 coat is sufficient on a suitably prepared, uniform and primed substrate.

Top coat: ~150 to 250 g/m²

These figures are theoretical and do 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.

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

IMPORTANT

Existing coatings must be tested to confirm their compatibility with Sikagard®-850 Activator and Sikagard®-850 AG.

PRIMER

IMPORTANT

On rough substrates, use a brush to apply primer and make sure the primer covers all the surface including voids.

IMPORTANT

Allow the primer surface to dry and become tack-free before applying the top coat (~2–3 hours depending on weather conditions).

IMPORTANT

Allow Sika MonoTop mortars to cure for 3–5 days before applying primer.

Substrate without existing coating (including Sika MonoTop® products)

1. Dilute Sikagard®-850 AG with ~50 % (by weight) of white spirit.
2. Apply the diluted product evenly over the prepared substrate using a brush or fleece roller at the required consumption rate.
3. The primer must be continuous and pore free.

Substrate with existing coating

1. Apply Sikagard®-850 Activator evenly over the prepared substrate using a brush or fleece roller at the required consumption rate. Refer to Product Data Sheet.
2. The primer must be continuous and pore free.

Substrate with hydrophobic impregnation

1. Dilute Sikagard®-850 AG with ~50 % (by weight) of white spirit.
2. Apply the diluted product evenly over the prepared substrate using a brush or fleece roller at the required consumption rate.
3. The primer must be continuous and pore free.

Wood (coated and uncoated)

Does not require priming

TOP COAT

Application by brush or fleece roller (long-haired)

Note:Dilute Sikagard®-850 AG with ~30 % (by weight) of white spirit over Sika MonoTop® mortars.

1. Dilute Sikagard®-850 AG with ~20 % (by weight) of white spirit.
2. If required, mix the coloured pigment into the diluted product until fully dispersed and a uniform colour is achieved.
3. Apply the diluted product evenly over the prepared substrate.
4. The coating must be continuous, pore free and to the required surface finish.
5. Protect Product from heavy rain or rain showers until dry to prevent surface damage

Application by airless spray

IMPORTANT

Do not use aerosol car body type spraying equipment.

Note: The airless spray may not give a smooth or acceptable finish. It may be necessary to back-roll the coating with a roller to ensure a suitable finish and film build-up.

Requirement: Airless spraying characteristics:

• Pressure: 220 to 250 bar (3200–3600 psi)
• Hose diameter: ~10 mm (3/8")
• Tip: 0,13° to 0,17°
• Filter: 60 mesh

1. Dilute Sikagard®-850 AG with ~30 % (by weight) of white spirit.
2. If required, mix the coloured pigment into the diluted product until fully dispersed and a uniform colour is achieved.
3. Spray apply the Product in a continuous operation and at a speed to achieve a consistent thickness.
4. The coating must be continuous, pore free and to the required surface finish.
5. Protect Product from heavy rain or rain showers until dry to prevent surface damage.

• Clean all tools and application equipment with white spirit immediately after use. Hardened material can only be mechanically removed.
• Clean airless spray equipment at regular intervals to prevent harden silicon particles blocking the spraying tip.

Graffiti removal

IMPORTANT

Do not use rotating nozzle on high-pressure cleaning equipment.
As a general rule, always remove graffiti as soon as possible using either of the 2 options:

1. Cold-water high-pressure jetting / cleaning equipment (~80 bar / 1200 psi) from a distance of ~10 cm from the substrate.
2. Cold-water low pressure washing and rubbing down with a suitable absorbent clean cloth or a soft scrubbing brush.

Poster removal
Posters applied with water-based paste glues, do not bond on substrates treated with Sikagard®-850 AG. They will either fall under their own weight or can easily be removed with minimal effort.