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Product Data Sheet

Aromatic Urethane 520

DESCRIPTION

Aromatic Urethane 520 is a single component moisture cured, elastomeric urethane coating.

USAGE

These urethane coatings are designed as general purpose waterproofing coatings. They are used over a variety of surfaces to provide weather durability, wear resistance, and waterproofing.

LIMITATIONS

Urethane 520 should not be applied to the exterior of refrigerated tanks.

WEATHERABILITY

Excellent durability, good color stability and chalk resistance.

CHEMICAL RESISTANCE

Good salt and solvent resistance. Fair resistance to acid and alkali.

PRIMER

Contact Southeastern Coatings for primers

MIXING

Mix with a INDCO type folding mixer (use extension for 55 gallon (208 L) drums) before application to assure uniform color and consistency.

APPLICATION

Apply by brush or roller as received. Thinning up to one pint per gallon (.5 L/3.8 L) is permissible if viscosity increases. For spray application, use as received. For cold weather application, keep material stored above 65ºF (18ºC).

TECHNICAL DATA

Color:	White, Oyster, and Gray
Tensile: ASTM D-412 Strength: Elongation: Permanent Set at Break:	2,200 psi Min. (155 kg/m`²`) 350% Min. Less than 20%
Tear Resistance:	ASTM D-624 Die C 280 Lb/In (50 kg/cm)
Hardness Cured	ASTM D-676 80 ± 5 Shore A
Water Vapor Permeability:	ASTM E-96 Method B, 100% R.H. Difference 0.02 Perm Inches (.5 mm)
Flammability:	ASTM E-108 (UL790) Class A
Toxicity	Contains flammable solvents and an isocyanate prepolymer. Threshold limit is 100 parts solvent vapor per 1 million parts air. Use only in ventilated areas or with fresh air supplied face masks if in a confined area. Avoid breathing vapors or spray mist. Contains an isocyanate polymer, which may be irritating to the skin or toxic if inhaled. Any material contacting skin should be neutralized by washing with generous quantities of soap and water.
Adhesion:	Excellent adhesion to polyurethane foam, single ply, metal, and other surfaces. Some surfaces may require bonding primer
Coverage:	Sq.ft./Gal./Mil. 1128 Minimum (21 m`²`/L/mm)
Solids: (Method 4041 Fed. Std. 141)	Weight: 79.1% Minimum Volume: 70.3% Minimum
V.O.C.:	Maximum volatile organic compounds content is 255 grams per liter.
Flash Point:	ASTM D-56 65ºF (18ºC)
Storage Stability:	Black 6 months and colors 3 months from date of manufacture when stored in sealed containers below 75ºF (24ºC). U-6801 is produced on a "by order" only, allow time for production when ordering.
Thinner & Cleaner:	Use T-5116
Cure:	Applied coating will cure in 24 hours with 70ºF (21ºC) and 40% relative humidity. Lower temperatures and humidity will require longer times to cure.
Clean Up:	Clean spray equipment with T-5130 thinner.