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Sika® Aktivator-205 LUM

Sika® Aktivator-205 LUM

Transparent solvent-based, detectable adhesion promoter for non-porous substrates

Sika® Aktivator-205 LUM is a solvent-based 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 LUM is designed for the treatment of non-porous bond faces prior to the application of Sikaflex® and Sikasil® adhesives and sealants. Sika® Aktivator-205 LUM fluoresces under long-wave UV light for a limited period of time. This feature is used for in-process control.  

  • Enhanced adhesion on various substrates
  • Visible under UV-light
  • Short flash-off time
  • Easy to use
  • Transparent
 
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PRODUCT BENEFITS

  • Enhanced adhesion on various substrates
  • Visible under UV-light
  • Short flash-off time
  • Easy to use
  • Transparent
 

Areas of Application

Sika® Aktivator-205 LUM 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 LUM 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 ensuring adhesion and material compatibility.  

Advantages

  • Enhanced adhesion on various substrates
  • Visible under UV-light
  • Short flash-off time
  • Easy to use
  • Transparent
 

Product Details

Typical Product Data
Chemical base

Solvent-based adhesion promoter

Color (CQP001-1)

Colorless, clear

Application temperature

5 ─ 40 °C

Application method

Wiping with lint-free paper towel

Consumption

20 ml/m2

Flash-off time

minimum

maximum

10 minutes A/B

2 hours A/B

Shelf life

12 months C

CQP = Corporate Quality Procedure

A) 23 °C / 50 % r. h.

B) for specific application, temperature and flash-off time may be differentC) stored in sealed container in a dry place at ≤ 25 °C
Technical Information

IMPORTANT NOTE

Sika® Aktivator-205 LUM 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 LUM is accidentally splashed onto adjacent surfaces, wipe-off immediately with a clean, dry cloth.

 

Sika® Aktivator-205 LUM 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 LUM to become inactive. Immediately discard Sika® Aktivator-205 LUM 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 infrequest use.

Never dilute or mix Sika® Aktivator-205 LUM with any other substances.

It must not be used for tooling/smoothing of products or as cleaning agent.

If used on transparent or translucent substrates such as float glass, plastics, etc., an adequate UV protection is mandatory.

DETECTION OF THE LUMINESCENCE

Sika® Aktivator-205 LUM can be visualized by using a light source with a wavelength of 320 to 420 nm as in-line control. By reducing foreign light such as sunlight or artificial light during the detecting process the quality of the detection can be increased significantly.

Note: The luminescent effect will degrade with time.

Application

Application Information

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.

Application

Wipe bond faces with a clean, lint-free paper towel moistened (not wet) with Sika® Aktivator-205 LUM. 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 LUM 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.

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