Sika® Aktivator-205 is a solvent-based colorless clear adhesion promoter, which reacts with moisture and deposits active groups on the substrate. These groups act as a link between substrates and primers or sealants / adhesives. Sika® Aktivator-205 is designed for the treatment of bond faces prior to application of Sikaflex® and Sikasil® adhesives and sealants.
UsageSika® Aktivator-205 is used to improve adhesion on non-porous substrates such as metals, plastics, ceramic screen prints and painted surfaces. Seek manufacturer’s advice and perform tests on original substrates before using Sika® Aktivator-205 on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Solvent-based adhesion promoter
5 ─ 40 °C
Wiping with lint-free paper towel
10 minutes A/B
2 hours A/B
12 months C
CQP = Corporate Quality Procedure
A) 23 °C / 50 % r. h.
B) for specific application, temperatur and flash-off time may be different
C) stored in sealed container in a dry place at ≤ 25 °C
Sika® Aktivator-205 contains solvent which may dull the surface finish of some freshly applied paints. Preliminary trials must be carried out.
Never apply to porous substrates since it may not dry completely and prevent the adhesive or sealant from curing.
Protect adjacent surfaces by masking where necessary.
If Sika® Aktivator-205 is accidentally splashed onto adjacent surfaces, wipe-off immediately with a clean, dry cloth.
Sika® Aktivator-205 is a moisture reactive system. In order to maintain product quality it is important to reseal the container with the inner plastic liner immediately after use. Once the surface pre-treatment operation is completed the cap has to be screwed on. Prolonged exposure to atmospheric moisture will cause Sika® Aktivator-205 to become inactive. Immediately discard Sika® Aktivator-205 if it has become opaque instead of clear. Dispose of product approx. one month after opening if used frequently or after two months in case of infrequent use. 30 ml cans are for single application only.
If used on transparent or translucent substrates such as float glass, plastics, etc., an adequate UV protection is mandatory.
Never dilute or mix Sika® Aktivator-205 with any other substrances.
It must not be used for tooling/smoothing of products or as cleaning agent.
METHOD OF APPLICATION
Surfaces must be clean, dry and free from grease, oil, dust and contaminants.
Adhesion on substrates may be improved by adding and/or combining pre-treatment processes such as scuffing and cleaning prior the activator application.
Wipe bond faces 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.
Sika® Aktivator-205 has to be applied sparingly as excess of 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 (once only).
Ideal application and surface temperature is between 15 °C and 25 °C.
Consumption and method of application depends on the specific nature of the substrates.
Tightly reseal container immediately after each use.