Sikagard®-850 Clear

• CE marking and Declaration of Performance (Ref. 31191591) based on EN 1504-2:2004 Products and systems for the protection and repair of concrete structures — Surface protection systems for concrete — Coating.
• Adhesion after thermal compatibility EN 13687-1:2002 (100 cycles of freeze and thaw with de-icing salts) and EN 13687-2:2002 (10 cycles of thunder shower) - Applus Laboratories, Spain, Report Nber 21/32304762.
• Cleaning test as per SILKO procedure (v2:2019 § 4.2) and 20 cycles of cleaning - Applus Laboratories, Spain, Report Nber 21/32306190.

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 +35 °C. Always refer to packaging.

~0,92 g/cm³

~580 mPa·s (at +20 °C)

~430 mPa·s (at +40 °C)

~350 g/L (calculated)

When applied to bare mineral surface, Sikagard®-850 Clear may provide a wet look effect. To reduce/eliminate this effect, the following build-up is recommended:

Sikagard^®-552 W Aquaprimer + Sikagard^®-850 Activator + Sikagard®-850 Clear.

Note "a" of Table 5 of EN 1504-2: When the capillary absorption to water is <0.01 kg/m²*h^0.5 the diffusion of chloride ions is not to be expected

Conforms to Class I (<5 m)

No bubbles, cracks or surface defects after weathering.

Tests were performed after 100 cycles instead of 50 cycles as requested by EN 1504-2

~140 to 270 μm (wet film thickness)

+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.

Anti-graffiti and anti-poster protection is achieved as soon as the coating has dried out (~24 hours).

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

Top coat: ~125 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 Clear.

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 (mineral) without existing coating or hydrophobic impregnation (including Sika MonoTop® products)

1. Apply Sikagard®-850 Primer evenly over the prepared substrate at the required consumption rate. Refer to Product Data Sheet.

2. The primer must be continuous and pore free.

Substrate (mineral or wood) with existing coating / lasure

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

Substrate with hydrophobic impregnation

1. Prime with Sikagard®-850 Primer evenly over the prepared substrate at the required consumption rate. Refer to Product Data Sheet.
2. The primer must be continuous and pore free.

Wood (uncoated)

No priming is required

TOP COAT

IMPORTANT

If applied over a primer or activator, refer to appropriate drying time / waiting time to overcoating.

Application by brush or medium to long hair roller

1. If required, mix the coloured pigment into the product until fully dispersed and a uniform colour is achieved.
2. Apply the Product evenly over the surface.
3. The coating must be continuous, pore free and to the required surface finish.
4. Protect the freshly applied coating 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. If required, mix the coloured pigment into the product until fully dispersed and a uniform colour is achieved.
2. Spray apply the Product in a continuous operation and at a speed to achieve a consistent thickness.
3. The coating must be continuous, pore free and to the required surface finish.
4. Protect the freshly applied coating 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 hardened 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 two 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 Clear. They will either fall off under their own weight or can easily be removed with minimal effort.

Kindly discard them properly in a recycling center (in accordance with local requirements).