| Product: | PERMA-SEAL® FLEXIBLE RESIN
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| Client: | Halifax Shipyard
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| Treatment Date: | August, 1995
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| Outcome: | No leakage since treatment
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Halifax Shipyard's graving dock, or dry dock as it is also known,
is a major facility in Maritime Canada for the repair of commercial vessels.
The historic dry dock was first built over 100 years ago and has been
regularly upgraded and enlarged.
During a recent refit, the electrical contracting firm of Black & McDonald
Limited of Halifax installed new electrical conduits in a channel in the
sides and bottom of the concrete dock. Some replacement concrete that
covered the new conduits wasn't agitated properly, causing poor bonding
with the original material in some areas and honeycombs or voids in the
new concrete. The result was saltwater leakage into the ducts whenever
the dry dock was flooded, according to Arnold Booth, electrical
superintendent for Black & McDonald.
Rather than tear everything out and start again, they called PERMACRETE®
whose specialists suggested their own crack repair process be carried
out using PERMACETE®'s THERMO-JET™ technology and PERMA-SEAL®,
a specially-formulated repair material that is pressure-injected to
ensure penetration through the entire wall, from bottom to top, from
the inside out. PERMA-SEAL® fills the crack and all capillaries,
thermally fusing to the concrete.
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In this case, PERMASEAL® was applied to affected areas while they
were still wet. "It seems to have worked," says Booth. "They've had
a number of different ships in there since the repairs."
Booth says he is very impressed by the PERMACRETE® solution.
"I wasn't sure the repair could be done without tearing everything out,"
he says. "They saved me money."
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