DeFelsko PosiTest AT v.4.0 - Manual (Page 4)

Page 5
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 gener-
ated.
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
Many adhesives cure faster and provide a stronger bond when cured
with heat. Similarly, cold environments may cause a longer cure time and weak-
er bond strength.
Step 3: Test Area Separation Step 3: Test Area Separation
Drilling Template
Cutting Instructions
1.
Cut through the coating around the edges of the dolly with the included cut-
ting tool, removing any excess adhesive.
2. Clear away any debris from the cutting process.
- Cutting may induce coating surface flaws such as microcracking that
may alter test results.
- For coatings with strong lateral bonding it is recommended to cut
completely through the coating down to the substrate.
The decision of when to cut around a dolly is dependent on the standard,
specification or contractual agreement to which the test is to comply. The primary
purpose for cutting through the coating is to isolate a specific diameter test area.
When the decision to cut into the coating has been made, it is recommended to
cut all the way through to the substrate. As a minimum, it is suggested to carefully
cut away excess adhesive from the dolly application process. This typically
prevents a larger area of coating from being pulled away from the substrate,
resulting in a higher pull-off pressure.
When testing very thick coatings, an optional drilling template may be preferred.
NOTE:
NOTE: