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SPECTRASHIELD TESTING AND INSPECTION
The SpectraShield® Liner System is covered by a 10-year warranty from both
the manufacturer and applicator. Failures, as delineated in the warranty
agreement, are repaired or replaced during the warranty period.
1. The SpectraShield system is spray applied at high temperatures (150ºF)
and sets firm in a matter of seconds. Accordingly, a wet film thickness
gauge cannot be used. In lieu of wet film thickness testing, a sharp
pointed tool, such as a scribe or awl may be inserted into the just coated
area to confirm the thickness of all three layers meets or exceeds the 500mil minimum standard. This test is a destructive test, in that it creates a
holiday or void. Such testing must be performed with 10 minutes of
completion so that the repair of the holiday can be performed before the
system fully cures.
2. Adhesion testing may be performed on the first barrier coat only utilizing a
portable adhesion tester as described in ASTM D7234. Following
application of initial coat to substrate surface, mask off one or more test
areas per structure. Finish applying system’s two (2) additional coats to
structure except masked area. Remove masking, and glue portable
adhesion tester dollies to coating as per testing device recommendation.
Following adhesion curing time (typically 24 hours) testing device may be
used to measure coating adhesion to substrate. Upon testing conclusion,
repair masked area with final two coating layers per MANUFACTURER’S
RECOMMENDED REPAIR method.
3. The SpectraShield Liner System may be High Voltage Spark tested in
accordance with NACE RP0188-2006 “Discontinuity (Holiday) Testing of
Protective Coatings”, after coating application. A high-voltage spark tester
is used to determine discontinuities in the SpectraShield coating on
conductive concrete or brick surfaces. Spark testing of the SpectraShield
system should occur within 1 hour of the coating application. Surface
moisture such as condensation deposition as from an overnight
temperature change will affect the testing and would require thorough
drying before testing can resume. The spark tester should be adjusted to
the proper voltage for the coating thickness, which for a standard
SpectraShield application is 20,000 volts; for inverts the proper voltage is
5,000 volts. All detected holidays shall be marked and repaired by the
Rev 6/14
manufacturer’s recommended method. Care should be employed in the
event CIPP pipe lining is present as that material will activate the test unit.
4. ASTM C1244 Vacuum Test is a method for testing newly installed precast
manhole sections to demonstrate the integrity of the installed materials
and the construction procedures. The test method is used for testing
concrete manhole sections utilizing mortar, mastic, or gasketed joints. This
test method is intended to be used as a preliminary test to enable the
installer to demonstrate the condition of the concrete manholes prior to
backfill. This test method is not designed for coating adhesion evaluation.
5. Visual inspection may be performed by the Project Engineer or Inspector,
and any deficiencies in the finished system should be marked and
repaired according to the manufacturer’s recommended method.
Rev 6/14