Product Data Sheet Show all documents

Sikagard®-850 AG

Permanent clear anti-graffiti and anti-flyposter coating

Sikagard®-850 AG is a permanent anti-graffiti and anti-flyposter coating for the protection of concrete, wood, masonry and metal substrates. Sikagard®-850 AG provides a clear wet-look surface that also brightens and enhances the color of the substrate. Sikagard®-850 AG is based on polyorganosiloxanes and provides excellent performance against exterior elements such as rain, sun and temperature extremes.

  • Permanent – graffiti can be removed various times without damaging the protection
  • Poster prevention – flyposter simply cannot stick on treated surface
  • No chemical agent required for cleaning
  • Cleaning requires only cold water pressure (80 to 100 bars). Alternatively, graffitis can be removed using a simple hose and rubbing down with a suitable absorbent clean cloth or stiff brush
  • Water vapour permeable
  • Low water absorption
  • Very good resistance against weathering and ageing
  • High UV resistance and gloss retention
  • Very low dirt pick-up
  • Colour enhancement – wet look
  • Can be tinted on site with pigment suitable for solvent containing product
Product Data Sheet Show all documents

Usage

Sikagard®-850 AG is used as permanent anti-graffiti and anti-flyposter coating. There is no need of a refreshing coat after the cleaning operation that can be performed many times. Typical substrates:
  • Fair faced concrete, masonry
  • Coated concrete, masonry
  • Mineral substrate previously treated with hydrophobic impregnation
 
  • Metallic surfaces (coated or not)
  • Wooden surface treated or not

Advantages

  • Permanent – graffiti can be removed various times without damaging the protection
  • Poster prevention – flyposter simply cannot stick on treated surface
  • No chemical agent required for cleaning
  • Cleaning requires only cold water pressure (80 to 100 bars). Alternatively, graffitis can be removed using a simple hose and rubbing down with a suitable absorbent clean cloth or stiff brush
  • Water vapour permeable
  • Low water absorption
  • Very good resistance against weathering and ageing
  • High UV resistance and gloss retention
  • Very low dirt pick-up
  • Colour enhancement – wet look
  • Can be tinted on site with pigment suitable for solvent containing product

Packaging

25 kg pail or 180 kg drum

Product Details

Product Information

Chemical Base

polyorganosiloxanes polymer and solvent

Shelf Life

12 months from date of production if stored properly in undamaged and unopened original sealed packaging

Storage Conditions

Store in cool (below 30 °C) and dry conditions. Protect from direct sunlight.

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

Application

Application Information

Thinner

Sikagard®-850 AG can be thinned to the desired application viscosity with white spirit.

Layer Thickness

Typical dry film thickness can range from 150 to 300 µm depending of the substrate type and roughness

Ambient Air Temperature

+8 °C min. / +35 °C max.

Relative Air Humidity

< 80 % RH

Dew Point

Temperature must be at least 3 °C above dew point.

Curing Treatment

Sikagard®-850 AG does not require any special curing but must be protected from rain for at least 4 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

Typically ~ 150 to 250 g/m² for the top coat – generally 1 coat is sufficient on a suitably prepared, uniform and primed substrate.
Application steps

APPLICATION

Primer

All surfaces but wood, must first be primed using Sikagard®-850 AG diluted with 20 to 30 % white spirit. On rough substrate, use a brush to make sure to apply the primer well in the defects of the substrate. Allow the surface to dry and become tack-free prior to apply the top coat (~2 to 3 hours depending on weather conditions).

Wood surfaces (painted and unpainted) do not require priming.

 

Top Coat

For the top coating, on small to medium surface area, apply Sikagard®-850 AG using a suitable long haired roller or brush

Generally

apply un-diluted

Application at > 25 °C or directly in the sun

dilute with < 15 % by weight white spirit

For large surface area, airless spray application can be done using air assisted airless equipment with the following characteristics:

  • Pressure:  220 to 250 bars (3200–3600 psi)
  • Hose: ~ 10 mmø (3/8")
  • Tip: 0.13° to 0.17°
  • Filter: 60 mesh

All coats shall be diluted up to 30% with white spirit. In order to achieve sufficient film build up a second top coat may be required.

As Sikagard®-850 AG is very viscous, the airless spray does not give a homegeneous finish. It is necessary to have another team back-rolling the application with a roller to ensure proper finish and film build-up.

DO NOT USE aerosol car body type, spray equipment to apply Sikagard®-850 AG.

CLEANING OF TOOLS

Clean all tools and application equipment with white spirit immediately after use. Dried material can only be removed mechanically

Clean airless equipment at regular interval as some harden silicon materials may block the equipment.

CLEANING

Graffiti Removal As a general rule, always remove any subsequent graffiti as soon as possible. Do this using cold water pressure jetting / cleaning equipment (~ 80 bars / 1 200 psi). Alternatively, the graffiti can also be removed using a simple hose and rubbing down with a suitable absorbent clean cloth.

Poster removal Posters applied with typical glues do not bond on substrates treated with Sikagard®-850 AG. Either they will fall down under their own weight or they can be easily removed with minimal effort.

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