Liquid Urethane Rubber |
U-66 January 2002 Supersedes 07/00 |
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DESCRIPTION: |
U-66 Series Liquid
Applied Urethane Rubber compounds are weatherable, fire retardant, two
component elastomers. | ||||||
USAGE: |
Intended for use on
roofs, mechanical room floors, walking and traffic decks where excellent
weathering, fire retardance, toughness, fast cure and good solvent
resistance are needed. Suitable substrates include concrete, plywood,
sprayed in place polyurethane foam and metal. | ||||||
STANDARD COLORS: |
U-6601 Oyster, U-6602
Pewter, U-6616 Shale, U-6618 Adobe. | ||||||
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WEATHERABILITY: |
Excellent durability
and chalk resistance, light colors are subject to slight yellowing.
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CHEMICAL RESISTANCE: |
Good salt, acid and
solvent resistance. Fair alkali resistance. Excellent hydrolytic stability
to 160ºF (71ºC). | ||||||
TENSILE: |
ASTM
D-412
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HARDNESS: |
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TEAR RESISTANCE: |
ASTM D-624 Die
C
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WATER ABSORPTION: |
ASTM D-471
Max.
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WATER VAPOR PERMEABILITY: |
ASTM E-96 Procedure B.
Max.
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TOXICITY: |
Contains solvents
which require normal precautions in handling materials of this type. Part
B contains approximately 3% isocyanate which is toxic if heated in a
confined area or inhaled as particulate matter. Consequently, a
particulate matter respirator is required for spray application and
containers of Part B should not be warmed above 120ºF (48ºC).
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ADHESION: |
Adheres well to wood,
sprayed-in-place polyurethane foam, neoprene, Hypalon® coatings and
GacoFlex primers. See primer recommendations below (or Primer Recommendation
Chart), for specific surfaces. The GacoFlex primer-sealer system is
recommended to minimize blistering when coating over porous concrete. U-66
series coatings can be re-coated when set to touch or as much as a week
between coats may be allowed, as long as the surface is clean and dry. Use
neoprene primer over U-66 to assure adhesion of Hypalon® topcoats, when
used. | ||||||
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COVERAGE: |
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SOLIDS: |
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V.O.C.: |
Conforms to V.O.C.
regulations. V.O.C. content is 210 grams per liter. | ||||||
FLASH POINT: |
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STORAGE STABILITY: |
Part A and B, 1 year
at 50 to 80ºF (10ºC to 27ºC). | ||||||||||
THINNER: |
T-5116 for brush,
roller or spray. T-5118 for troweling. | ||||||||||
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PRIMER: |
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MIXING INSTRUCTION: |
Examine both
components to determine that they have not solidified. Stir Part A to
suspend any settled pigment. Combine equal volumes of Part A and Part B.
Mix thoroughly (power mixing is mandatory for quantities over two
gallons). | ||||||||||
POT LIFE: |
Pot life varies with
the temperature of the material; including the temperature at which the
material is stored. As a general guide, pot life can be expected when
material temperatures are as follows:
Pot life can be extended twice as long at each temperature with the addition of T-5130 thinner, up to a maximum of 15% by volume. Brush, roll or notch trowel as mixed. Thin as needed, however, do not thin more than one pint per gallon. For spray application, thin if necessary with T-5116. Apply with conventional spray gun or with airless spray equipment. When thinning for trowel application at temperatures above 80ºF (27ºC), use T-5118 trowel thinner to prevent rapid skin formation on the surface. Up to 15% thinning is allowable to compensate for increasing viscosity which will occur at the end of pot life. Thoroughly clean spray equipment with T-5130 thinner. Circulate through lines and gun until residual U-66 is removed. Flush with clean thinner. See General Instructions GW-3-1 for safety and storage notes, and GW-3-3 for complete application details. When application is to surfaces with a temperature between 30ºF and 50ºF (-1°C and 10°C), mix Part A and Part B which have been warmed to 60ºF (16°C) minimum and let mixture stand for 15 minutes before application. This will cause a viscosity increase so that up to one pint of thinner will be required for application. Do not apply U-66 materials to surfaces below 30ºF (-1ºC). | ||||||||||
CURE: |
Applied coating will
set in eight hours at 70ºF (21ºC) and can be used for light foot traffic
after 24 hours cure. For vehicle traffic, an additional 24 hours is
necessary.
A special accelerator, U-5651, is available to increase the rate of cure. Up to ¼ ounce per gallon (7 ml per 3.78 L) in Part A may be used to double cure rate; pot life will be reduced accordingly. Do not use more than ¼ ounce per gallon (7 ml per 3.78 L) in Part A, because using more than the optimum quantity interferes with curing. |