TEKNOCRYL PRIMER 25-11
Primer
TEKNOCRYL PRIMER 25-11 is a one-pack fast drying acrylic primer.
Paint is mainly suitable for use on zinc-coated surfaces but it has good adhesion to most of the substrates. Very suitable on surfaces which are exposed to moisture or dampness. Very good adhesion to most of the metal surfaces. Good anticorrosive properties and also very good water and alkali resistance.
Surface preparation
Remove from the surfaces any contaminants that might be detrimental to surface preparation and application. Remove also water-soluble salts by using appropriate methods. The surfaces are prepared according to the different materials as follows:
STEEL SURFACES: Remove mill scale and rust by blast cleaning to preparation grade Sa 2½ (standard ISO 8501-1). Roughening the surface of thin-plate improves the adhesion of the paint to the substrate.
ZINC SURFACES: Hot-dip-galvanized steel structures that are exposed to atmospheric corrosion can be painted if the surfaces are sweep blast-cleaned (SaS) till matt all over. Suitable cleaning agents are, e.g. aluminium oxide and natural sand. It is not recommended according to standard ISO 12944-5 to paint hot-dip-galvanized objects that are subjected to immersion strain. Painting of hot-dip-galvanized objects that are subjected to immersion strain must be discussed separately with Teknos.
ALUMINIUM SURFACES: Treat the surfaces with RENSA STEEL washing agent. Surfaces that are exposed to weathering are also roughened up with sweep blast-cleaning (AlSaS) or sanding.
OLD PAINTED SURFACES SUITABLE FOR OVERCOATING: Any impurities that might be detrimental to the application of paint (e.g. grease and salts) are removed. The surfaces must be dry and clean. Old, painted surfaces that have exceeded the maximum overcoating time are to be roughened as well. Damaged parts are prepared in accordance with the requirements of the substrate and the maintenance coating.
The place and time of the preparation are to be chosen so that the prepared surface will not get dirty or damp before the subsequent treatment.
Additional instructive information for surface preparation can be found in standards EN ISO 12944-4 and ISO 8501-2.
Prefabrication primer: KORRO PVB, KORRO E epoxy, KORRO SE zinc epoxy and KORRO SS zinc silicate prefabrication primers can be used, when required.
Application
Stir thoroughly before use.
Apply preferably by airless spray as only this method provides the recommended film thickness in a single operation. Suitable airless nozzle size 0.015". Brush can be used for touching up and painting small areas.
Application conditions
The surface to be treated must be dry. During the application and drying period the temperature of the ambient air, the surface and the paint shall be above 0°C and the relative air humidity below 80%. Additionally, the temperature of the surface to be treated and the product must be at least +3°C above the dew point of the ambient air.
Storage
The storage stability is shown on the label. Must be stored tightly closed and kept cool.
KORRO PVB, KORRO E epoxy, KORRO SE zinc epoxy and KORRO SS zinc silicate prefabrication primers can be used, when required.
| Solids | abt. 48 % by volume |
|---|---|
| Total mass of solids | abt. 736 g/l |
| Volatile organic compound (VOC) | abt. 460 g/l |
| Gloss | Matt |
| Practical spreading rate | The values depend on the application technique, surface conditions, overspray, etc. |
| Drying time – forced drying | 80°C / 20 min |
| Drying time - overcoatable | 1 h |
| Thinner | TEKNOSOLV 1639 |
| Clean up | TEKNOSOLV 1639 |
| Colours | Grey. |
| Safety markings | See safety data sheet. |