Activator 420 GL | Adhesion Activator for Glass and Non-Porous Surfaces
Activator 420 GL is a specially formulated adhesion promoter for pre-treating specific surfaces such as glass, plastics, and metals to improve the bonding strength of U-Seal and SiMP-Seal adhesives. It is suitable for applications in the automotive and transportation industries (buses, trucks, trains).
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Float glass and ceramic-coated glass (frit)
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Metals such as steel, stainless steel, aluminum, copper, electroplated steel, etc.
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Surface and paint coatings (epoxy and polyester-coated steel sheets)
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Cut surfaces of PU or MS-based adhesives for replacement
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Plastics
Application
Activator 420 GL is used to clean and enhance adhesion on various non-porous surfaces, particularly glass and ceramic-coated glass, metals, ceramics, plastics, and painted surfaces. For automotive applications, please refer to NPT’s application guidelines for the procedure on automotive glass. Activator 420 GL can be used to improve adhesion on surfaces such as:
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Float glass and ceramic-coated glass (frit)
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Metals such as steel, stainless steel, aluminum, copper, electroplated steel, etc.
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Surface and paint coatings (epoxy and polyester-coated steel sheets)
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Cut surfaces of PU or MS-based adhesives for replacement
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Plastics
Technical Data
|
Appearance |
Liquid |
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Color |
Transparent |
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Chemical nature |
Adhesion promoters in solvent dispersion |
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Density [g/cm3] |
ca. 0,7 |
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Flash off [min] (23°C and 50% RH) |
≥ 10* |
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VOC content [% w/w] (NPT method 78) |
ca. 95 |
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Application |
By cloth or abrasive sponge |
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Application temperature [°C] |
From +5 to +35 |
*Surface activation time Maximum 2h
Instructions for Use
Ensure thorough cleaning of the surface. Dip a lint-free cloth or soft sponge into Activator 420 GL to wipe the surface, removing impurities, and allow it to dry for 10 minutes, no longer than 2 hours. If adhesive application has not been performed within 2 hours, the surface can be re-activated by applying a second treatment of Activator 420 GL, up to one additional application. Ensure the activator is completely dry and non-tacky before proceeding with bonding. Activator 420 GL has a consumption rate of approximately 40 ml/m². Close the bottle immediately after use. If the Activator 420 GL bottle is left open in the air for an extended period, the liquid may become cloudy and lose its effectiveness, in which case do not use the cloudy material. Ensure the bottle is tightly sealed after each use to prevent this. Use within one week after opening. Preliminary testing is recommended before application on surfaces, including tests for pressure cracking. Do not use Activator 420 GL to remove or treat U-Seal or SiMP adhesives.
Cleaning Instructions
Clean used tools with acetone or solvent. When the material is uncured, it can be wiped off with paper or cloth. Once cured, the product can only be removed mechanically. Avoid direct skin contact by wearing latex, rubber, or polyethylene gloves. If contact with skin occurs, remove immediately and wash with soap and water.
Storage Instructions
Activator 420 GL can be stored for 12 months in its original (unopened) packaging at temperatures between 10°C and 25°C in a cool, dry place. Storage temperature should not exceed 25°C for extended periods. Keep away from damp areas, direct sunlight, and heat sources.
