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Brent,
Are you
insulating the inside of your sub against the cold? If so why the
syntactic foam instead of another type? That isocyanurate tends to out gas
in think, might want to be carful of that in a closed
environment.
Brian
I
have two local friends, that spray polyurea coatings commercially.
One sprays in on there steel dock weldments and other items. The brand they
use is TurboLiner. At the moment I plan to have them spray the interior
of my sub after all the syntactic foam is cured.
http://www.turboliner.com/turbo_liner_vs_others.html
"Polyurea
is a type elastomer that is
derived from the reaction product of an isocyanate
component and a synthetic resin blend component through step-growth polymerization.
Practical
uses
Truck bed linersPolyurea truck bed
liners form a durable, water and air-tight, permanent liner for the exterior
of pick up trucks, dump trucks and steel containers. These durable, easy to
clean and abrasion resistant liners protect utility trucks from their harsh
duty environments. They also protect against rust and corrosion from damaging
trucks and containers. Polyurea liners can also be applied in varied thickness
to meet any specific application demand. Sprayed on truck bed liners are
available in many colors and can be wrapped over the top edge of the truck bed
to provide added protection from impact and abrasion.
Pipe and pipeline coatings and
liningsPolyurea coatings and linings are increasingly being used
to protect steel pipes from corrosion. Polyurea has demonstrated its ability
to last longer than paint and maintenance services and costs are reduced.
Polyurea is a great protective coating system for pipes that are insulated
with polyurethane foam. Polyureas are also being used to line the inside of
water and sewer pipes for infrastructure rehabilitation work.
Bridge coatingPolyurea's ability to
outlast paint and fight off corrosion is a major reason these systems are
being specified for bridge deck and structure coating by State DOT's around
the nation. The most common applications of polyurea coatings on bridges are
over steel and concrete.
Joint fill / caulkPolyurea is being
successfully used as a multi-purpose joint fill, caulking and sealant
material. It can provide a flexible, durable, weather-tight and traffic
resistant seal for all types of building joints, such as expansion joints and
control joints in masonry floors, perimeter joints, panels and doors, water
reservoirs, etc. It has excellent crack-bridging properties with high
elongation and tensile strength. The fast cure time and insensitivity to
moisture allows for a quicker installation with a wider application window.
Proper surface preparation and substrate condition is always
necessary.
Holding tanks
Tank coatingsPolyurea coatings protect
steel tanks from corrosion, chemicals, and other natural weather and jobsite
elements. With proper surface preparation, substrate condition, formulation
choice, primers, and installation procedures, polyurea goes on fast and stays
on long. Polyureas are great for extending the life of older tanks and can
offer limited structural characteristics as well. These systems can be applied
during primary construction or in a retrofit environment. With their fast cure
times they are ideal for retrofit since down time is significantly minimized
compared to some competing materials.
Tank liningsPolyurea linings are
resistant to many chemicals and industrial liquids. With their fast
application advantages and ability to adhere to properly prepared substrates,
polyureas are ideal for new storage tank primary lining and rehabilitation
projects.
Waste water treatment liningsFast
cure, chemical and abrasion resistant, concrete primary and secondary
containment linings.
Aquarium liningAquariums have also
found benefits with polyurea. The ability to form to properly prepared custom
shaped walls and themed ornaments make this system desirable. A spray applied,
water resistant liner, available in a variety of colors with rapid return to
service installation is why facility owners are turning to
polyurea.
Landscape & water
containmentLandscape designers and contractors have found similar
benefits with polyurea. Polyurea is often used to contain water for ponds and
pool decorations to form a primary containment liner. Use of geotextile
material is common when applying polyurea over dirt. Proper surface condition
is vital when applying over concrete and most other
substrates.
MarineAbove the water line and below,
polyurea can be very effective in protecting steel, aluminum, and fiberglass
in a variety of water sport and commercial marine applications. From sound
attenuation for fishing canoes, to fish hold liners, to hull protection and
bilge liners, polyureas are used in many abrasion, chemical and corrosion
resistant marine applications. "
http://en.wikipedia.org/wiki/Polyurea
Sounds
like a good product for coating concrete submarines as
well.
Another brand of polyurea
coatings is http://www.xtremeliners.com/
There
is also some interesting polyurea data here in this PDF.
http://www.kta.com/knowledge/PACE2005/Polyurea%20Coatings%20CLO.pdf
Regards,
Szybowski
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