Product Data Sheet Safety Data Sheet Show all documents

Sikagard®-850 AG

Permanent clear anti-graffiti and anti-flyposter coating

Sikagard®-850 AG is a 1- part, polyorganosiloxane-based, permanent anti-graffiti and anti-flyposter clear coating. It protects concrete, wood and masonry substrates from rain, sun and temperature extremes.

  • Permanent – graffiti can be removed many times without damaging the protection or requiring a refresher coat
  • Poster prevention – flyposter does not bond onto treated substrate
  • Clear wet-look finish
  • Brightens and enhances the substrate colour
  • No chemical agents required for cleaning
  • Cleaning requires only cold-water pressure (80 to 100 bar) or cold-water low pressure washing and rubbing down with a clean cloth or scrubbing brush
  • Water vapour permeable
  • Low water absorption
  • Very good resistance against weathering and ageing
  • Good resistance to UV exposure
  • Retains gloss finish
  • Applied by brush, roller or
  • Very low dirt pick-up
  • Can be tinted on site with pigment
Product Data Sheet Safety Data Sheet Show all documents

Usage

As a permanent anti-graffiti and anti-flyposter coating for:
  • Fair faced concrete, masonry
  • Coated concrete, masonry
  • Mineral substrates previously treated with a hydrophobic impregnation
  • Wooden surfaces (coated or uncoated)
Suitable for: Moisture control (Principle 2, method 2.3 of EN 1504-9)  

Advantages

  • Permanent – graffiti can be removed many times without damaging the protection or requiring a refresher coat
  • Poster prevention – flyposter does not bond onto treated substrate
  • Clear wet-look finish
  • Brightens and enhances the substrate colour
  • No chemical agents required for cleaning
  • Cleaning requires only cold-water pressure (80 to 100 bar) or cold-water low pressure washing and rubbing down with a clean cloth or scrubbing brush
  • Water vapour permeable
  • Low water absorption
  • Very good resistance against weathering and ageing
  • Good resistance to UV exposure
  • Retains gloss finish
  • Applied by brush, roller or
  • Very low dirt pick-up
  • Can be tinted on site with pigment

Packaging

25 kg container or 180 kg drum

Refer to current price list for packaging variations

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • 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

 
Product Information

Chemical Base

Polyorganosiloxanes polymer and solvent

Shelf Life

12 months from date of production

Storage Conditions

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.

Density

~0,939 kg/l (at +20 °C)

(DIN 51757)

Flash Point

~+54 °C

(ISO 3679)

Solid Content

> 90 %

Volatile organic compound (VOC) content

< 140 g/l (calculated)

Product Declaration

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

System Structure

System part

Product

Primer for coated mineral surfaces

Sika® Primer-790

Sikagard®-850 AG thinner

White spirit

Colouring pigment

Suitable for solvent - based products

Protective coating

Sikagard®-850 AG

Application

Application Information

Thinner

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

Layer Thickness

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 or wastage etc

Ambient Air Temperature

+8 °C min. / +35 °C max.

Relative Air Humidity

< 80 %

Dew Point

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

Curing Treatment

No special curing requirements, but must be protected immediately from rain for at least 4 to 5 hours at +20 °C.

Applied Product Ready for Use

Final dryingup to ~24 hours at +20 °C for thick film build-up
Full cure~7 days
Consumption

Consumption

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 or wastage etc. 1 coat is sufficient on suitably prepared, uniform and primed substrates.
Application steps

APPLICATION

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 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.

Mineral uncoated substrates (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 with a brush or fleece roller.

Mineral coated substrates

Apply Sika® Primer-790 evenly over the prepared substrate with a brush or fleece roller.

Wood (coated and uncoated)

Does not require priming

TOP COAT

Important: Do not use aerosol car body type spraying equipment

Application by brush or fleece roller

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 with a brush or long-haired fleece roller.

 

Application by airless spray

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. Apply the diluted product evenly over the prepared substrate with spraying equipment.

CLEANING OF TOOLS

  • 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.

CLEANING

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).
  2. Cold-water low pressure washing and rubbing down with a suitable absorbent clean cloth or 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 they can be easily removed with minimal effort.

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