DeFelsko PosiTest AT-M Manual De Instrucciones página 3

Coating Preparation
1. Lightly roughen the coating using the included abrasive pad.
As coating abrasion may introduce flaws, it should only be
used when necessary to remove surface contaminants, or
when the bond strength between the glue and the coating is
insufficient.
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-M 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 most coatings. 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 smooth
coatings, 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.
Glue & Dolly Application
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