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SKIPPER 5 MOISTURE METER USER GUIDE
DIAGNOSIS
Your Skipper 5 can be used to diagnose trapped mois-
ture which can contribute to osmosis in GRP boats and
rot and decay in wooden boats and wooden components.
The Skipper 5 is also essential in monitoring drying out
of hulls and other boat components prior to remedial
treatment.
Osmosis in GRP
Use Scale 3 G.R.P. when checking GRP boats.
Osmosis is a general term used to categorise a condition
where GRP degrades under water. This degradation is
caused by water penetrating the gel coat and react-
ing chemically with uncured resins, binders and other
elements in the GRP lay-up. Once reaction takes place,
pressure builds up and eventually blisters form.
Osmosis is most often found on the underwater area of
the hull or immediately above the waterline. If the Skip-
per 5 gives a high reading, it may indicate osmosis. It is
recommended that the immediate area is thoroughly
examined for blistering or other evidence of osmosis.
(Note that some anti-foulings may give elevated read-
ings due to the presence of conductive material in its
composition. In these circumstances, it is suggested
that the anti-fouling be removed and further testing
carried out on the area.)
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