too hard but it still retains all the chemical
resistance that all of their other aromatic
The slower-setting properties were an asset
for the way CSI planned on installing the
liner on-site. In order to form a completely
monolithic membrane in the containment
area, the liner would consist of numerous
sections of geotextile fabric adhered
together and coated with polyurea.
“Most rapid-set poly’s are done in four
seconds, but that’s just too fast for what we
were doing,” explained Kennedy. “The 380
has a 20-second gel time, that allowed us to
spray it down, let it gel, glue the fabric down
onto it, and then come back and spray on
top of it.”
p SPRAYING THE LINER
The pre-sprayed liners
are put in place prior to
the tanks being installed.
A segment of geotextile
is placed along the seam
and sprayed down with a
coat of polyurea.
Upon curing, the
previous seam has been
incorporated into the
monolithic polyurea liner.
CSI put forward an enticing solution, and
the pipeline operator, liking what it heard,
brought the company on board. However,
the project wasn’t as straightforward as CSI
Unlike the containment area in which
they sat, the storage tanks were being
completely replaced as opposed to restored.
The replacement was to take place before
CSI even arrived at the facility, rendering
it impossible for the company to install a
liner under the new tanks after they were
already situated. So, CSI had to break up the
project into two phases, initially producing
pre-sprayed liners that would then be
incorporated into the on-site installation.
(cont’d on the next page)
SPRAYFOAM insulation & roofing MAGAZINE 47