Sika Aktivator-205
At a glance
- Improves the adhesion of Sika
- Short cure time
- Easy to use
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Sika Aktivator-205 is a solvent-based, colourless adhesion promoter which reacts with moisture and deposits active groups on the substrate. These groups act as a bonding link between substrates and primers, adhesives or sealants. Sika Aktivator-205 is designed for the treatment of bonding surfaces prior to the use of Sikaflex adhesives and sealants.
Sika Aktivator-205 is used to improve adhesion on non-porous substrates such as metals, plastics, ceramic screen prints and painted surfaces.
Features of Sika Aktivator-205
- Enhanced adhesion on a wide range of substrates.
- Short flash-off time.
- Easy to use.
- Transparent.
Directions for use
We advise applying the activator to a clean and dry surface, free from all traces of grease, oil, dust and contaminants. Wipe the bonding surfaces with a clean, lint-free paper towel moistened (not wet) with Sika Aktivator-205. Never dip the towel into the activator. Only wipe the surface with a clean side of the towel. Do not moisten the same paper towel twice and change it frequently. Caution: Sika Aktivator-205 has to be applied sparingly as excess activator could lead to adhesion failure. If the pre-treated area is not bonded within the maximum flash-off time, the activation process has to be repeated (only once). The ideal application and surface temperatures are between 15 °C and 25 °C. Consumption and method of application depend on the specific nature of the substrates. Tightly reseal the container immediately after each use.
Specifications
Contents: 30 ml, 250 ml, 1 L
Chemical base: solvent-based adhesion promoter
Colour: transparent
Curing mechanism: moisture curing
Specific gravity (uncured): 1.3 kg/l
Non-sag properties: good
Application temperature: 5-40 °C
Consumption: 20 ml/m2
Flash-off time (min.): 10 minutes (23 °C / 50 % RH)
Flash-off time (max.): 2 hours (23 °C / 50 % RH)
Shelf life: 12 months (stored in sealed container in upright position in a dry place ≤ 25 °C)
Product properties
The key technical properties clearly listed in one place.
- Article number
- LIJ001417
-
The chemical base describes the chemistry of an adhesive, sealant, resin or coating, such as epoxy, polyester, polyurethane, (methyl)methacrylate or a hybrid polymer. It affects curing, flexibility and adhesion. Products with the same chemical base are not necessarily suitable for the same applications.
- solvent-based adhesion promoter
-
The period for which an unopened product remains usable under the specified storage conditions. Check whether the period starts from the manufacturing date or another date. Shelf life may be shorter after opening, especially for products sensitive to air or moisture.
- 12 months
-
Sag resistance describes how well a paste, sealant or coating stays in place after application without running or slumping. It matters on vertical surfaces, in thick adhesive joints and for overhead repairs.
A product may be thixotropic: it becomes easier to work when stirred or spread, then thickens again at rest. This makes application easier without the material immediately running down the surface. Sag resistance is not the same as viscosity; behaviour after application also matters.
- Good
-
The curing mechanism explains how a product develops its final strength or shape. The main mechanisms are:
- Two-component reaction (2K): a chemical reaction begins once components A and B are mixed. Mixing ratio and working time are important.
- Moisture curing (often 1K): the product reacts with moisture in the surrounding air. Temperature, humidity and film thickness affect the process.
- UV curing: light of the appropriate wavelength triggers the reaction. Areas that are not exposed to the light may not cure fully.
- Physical drying: water or solvent evaporates. This is different from chemical curing.
Some products use more than one mechanism, so the correct application conditions depend on the particular system.
- Moisture-curing
-
Consumption or coverage describes how much product is needed for a given surface area. Consumption may be stated in g/m² or kg/m², while coverage is often given in m²/L or m²/kg. A consumption of 0.2 kg/m² means a theoretical 200 grams per square metre. Actual use depends on film thickness, substrate absorbency, application method and waste.
- 20 ml/m²
- Net contents
- 1 L, 250 ml, 30 ml
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