Product Description
Masonsil Impregnating Agent is used for the colourless, water repellent impregnation of absorbent mineral building materials. The product's high alkali resistance makes it suitable for application to highly alkaline building materials such as fresh concrete, plaster, calcium silicate brick, fibrous cement, expanded concrete. It is also effective as water-repellent treatment for all other porous building materials, e.g. brick, natural and cast stone, silicate paints. Masonsil Impregnating Agent can be used as primer for silicone resin paints, emulsion paints and synthetic resin plaster. The low molecular weight of the form supplied enables the product to penetrate deeply into the building material. It can even be applied to slightly damp materials.

Typical Product Data

Active substance content	100% w/w
Viscosity (DIN 53015, at 23 ° C)	10 - 70 mPa
Density (DIN 51757, at 20 ° C)	1.1 g/ml
Colour value (DIN 6162)	max 4
Density lbs/gal	8.2
Warrant Period (months)	6

Instructions for Use
In the form supplied Masonsil Impregnating Agent is unsuitable for use as a water repellent. It has to be thinned. Suitable solvents are anhydrous aliphatic or aromatic hydrocarbons and alcohols.
The solubility and stability of Masonsil in aromatic free solvents such as: Exxsol D 30, D 40, D 60, Isopar G, L (Esso Chemie), Shellsol T (Shell Chemie), EC-Solvent 160/200 (EC Erdö lchemie). By using one of these formulations with mild odour are possible.
We recommend an active siloxane content of approx. 6 % w/w. in the final impregnating solution which can be achieved by thinning as follows:
-1 part w/w Masonsil
-17 parts w/w Solvent
which roughly corresponds to 1 part by vol. Masonsil 22 parts by vol. solvent depending on the density of the solvent used.
The ready-to-use impregnating agent can be applied in one or more coats to the dry and absorbent building material. It should be applied generously and evenly and a second coat should be applied while the first is still wet. Large surfaces should be treated by "flooding" (spraying and allowing the solution of impregnating agent to run down the surface like a curtain).
It is also possible to apply the product by brushing or dipping. Adjacent surfaces such as doors and windows, non-absorbent surfaces, etc. should be covered to avoid contact with the impregnation solution.
The quantity of impregnating agent required depends on the absorbtivity of the building material. In practice, it can vary between 0.1 and 1 l/m2. 1 l Masonsil (thinned for use) is sufficient to treat:

fibrous cement	concrete	calcium silicate brick	plaster	brickwork	expanded concrete
10.0 - 15.0 m2	3.0 - 5.0 m2	2.0 - 3.0 m2	1.5 - 2.5 m2	1.5 - 2.5 m2	1.0 m2

Preliminary trials are recommended to determine the suitability and effect of the impregnating solution and the quantities required.

Handling and Safety
Material Safety Data sheets are available upon request.

Storage
Should be stored in the original unopened container at above freezing temperatures, 4 - 27ºC.