DeFelsko PosiTest AT-A Pull-Off Adhesion Tester Bedienungsanleitung Seite 5

2. To promote the bond between the dolly and the coating,
degrease the area of the coating to be tested using alcohol or
acetone to remove any oil, moisture or dust.
NOTE:
Ensure that any alternative abrasion techniques,
degreasers or adhesives do not alter the properties of the coating.
Test by applying a small amount of degreaser or glue to a sample
area and observing effects.
Glue Selection
The glue included in the PosiTest AT-A kit has been selected due
to its versatility. This glue has minimal impact on a variety of
coatings and has a tensile strength exceeding the maximum
performance capabilities of the pressure system under ideal
conditions. Other glues may be preferred based on requirements
such as cure time, coating type, working temperature and pull-off
strength. Quick curing one-part cyanoacrylates (super glues) may
be sufficient for painted surfaces, but two-part epoxies are
preferred for porous or rough coatings.
Dolly Application
1. Mix the glue per manufacturer's instructions and apply a
uniform film of glue on the base of the dolly.
2. Attach the dolly to the prepared coating test area.
NOTE:
If the coated surface to be tested is overhead or vertical,
a means to hold the dolly in place during the cure time may be
required, i.e. removable tape.
3. Gently push down on the dolly to squeeze out excess
adhesive. Do not twist or slide the dolly back and forth on
the coating as air bubbles may be generated.
4. Carefully remove excess adhesive from around the
edges of the dolly with included cotton swabs.
5. Allow to cure per the adhesive manufacturer's instructions.
Glue & Dolly Application
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