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NONSTANDARD PRODUCT
DESCRIPTION
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CORRO-DUR
255 is formulated for effective field application by
brush, roller or plural component heated airless sprayer. The
CORRO-DUR 255 formulation
is based on the unique CORRO-DUR 258 resin system which may be
applied to damp or wet surfaces. This resin system is toughened
with *Kevlar fibers to give superior chip resistance and is pigmented
with select hard ingredients to further enhance wear resistance.
The cured film is glossy with a slight texture resulting from
the fiber reinforcement. Related products have been employed for
underwater application and have been subjected to both radiation
and DBA testing with excellent results. The resin system used
has excellent resistance to commodities such as hydrocarbon oils
and fuels, mineral acids like sulphuric acid at 98% concentration
and alkalies.
The solvent-free formulation avoids
the objectionable odor and explosion hazards of epoxy solvents.
Absence of solvents also assures compliance with all present and
proposed air pollution regulations and prevents common service
problems caused by shrinkage or water sensitivity of residual
entrained solvent residues.
*trademark E.I DuPont de Nemours Co.
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USES
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| SECONDARY
CONTAINMENT |
Excellent chemical
and impact resistance properties are ideal for tank linings,
pits, etc. |
| SURFACE
REINFORCEMENT |
Kevlar fiber enhancement
adds physical strength to Corro-Dur 255 excellent chemical strength. |
| WASTEWATER
TREATMENT |
Reinforcing, smoothing
and protecting worn concrete damaged by exposure to chemical
or municipal waste systems. |
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APPEARANCE
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| COLORS
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Gray
( slight yellowing ) |
| FINISH
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Gloss
with slight texture. |
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PHYSICAL PROPERTIES
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| VECHILE
TYPE |
Epoxy / Aliphatic
Polyamines |
| PIGMENTATION
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Color/ Fibrous reinforcing
/ Inert extender |
| CLEANER
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M.E.K or Lacquer
thinner, |
| MIXING
RATIO |
1.5/1.0 ( Volume)
or 1.87/1.00 by weight |
| INDUCTION
TIME |
Not required. |
| POT
LIFE |
Approx. 30 minutes
/ 77°F (25°C) |
| SOLIDS
BY VOLUME |
100 % |
| REC.
DRY THICKNESS |
12-24 mils (3-6mm)
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| DRY
TME (TOUCH) |
Approx.
4 Hrs/77°F (25°C) |
| DRY
TIME (HARD) |
Approx. 15 Hrs/77°F(25°C)
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| APPLICATION
METHOD |
Roller |
| SHELF
LIFE |
12 Months minimum.
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| VOC
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Zero. |
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SAFETY INFORMATION
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| FLASH
POINT |
Over 200°F
or 90°C (Closed Cup) |
| STORAGE
CONDITIONS |
Normal, Freezing
OK |
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SURFACE PREPARATION
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Steel
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For heavy duty applications
it is always preferable to abrasive blast in order to assure
maximum performance. CORRO-DUR
255 is extremely tolerant of compromised surface
preparation where tight rust of existing coating residues
must be overcoated. The solvent-free formula of CORRO-DUR
255 allows applications over existing coatings
without softening or swelling, in fact, even Styrofoam may
be successfully coated with this material. To ensure adhesion
over previously epoxy coated surface by abrasive blasting
or other means to provide an anchor profile.
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Concrete
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New surfaces must be abrasive
blasted or acid etched to remove the superficial layer of
laitance. Treat existing coatings as for steel. A pretreatment
of Corro-Dur 180 concrete sealer
can help seal the underlying concrete surfaces
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Underwater
Surfaces
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Abrasive blast to remove marine
growth and corrosion then apply by roller within 45 minutes
of surface preparation.
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As with all solvent-free coatings,
ensure a dust free surface prior to application, especially if
blasting or mechanical grinding is part of the surface preparation
process.
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APPLICATION
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CORRO-DUR
255 is supplied in two
gallon (7.6 liters) units. 1.33 gallons (5Liters) of epoxy base
are filled into a two gallon plastic pail and 0.67 gallons (2.51)
of curing agent are filled into a one gallon steel can to yield
a 2/1 mixing ratio. Stir the curing agent into the base preferably
using a mechanical mixer. Once mixing is complete, start application
immediately - CORRO-DUR 255 does
not require a "sweat-in" or induction time. Potlife is about 30
minutes at 77°F(25°C), small amounts of epoxy solvent may be added
if the mixture begins to thicken noticeably towards the end of
its working life. Apply CORRO-DUR 255
using brush or roller. Underwater application is best made using
rollers or paint pads after surface preparation by air/abrasive
or high pressure water blasting to remove loose surface contamination
and marine biological fouling.
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TEMPERATURE
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Temperature will exert a considerable influence on the rate of
curing of chemically cured coatings such as CORRO-DUR
255. In broad terms expect each 10°C, (18°F), rise
or fall in temperature to half or double dry times and pot lives.s.
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TRANSPORTATION
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USDOT, IATA & IMO "Non-regulated"
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