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Excel-Thane “MCU-250”

Chemical Family
Polyurethanes (PU)

Excel-Thane “MCU-250” is CLEAR polyurethane sealers for decorative concrete that are moisture cured, abrasion resistant, and stain resistant. Its foundation is an aliphatic (non-yellowing) isocyanate with a polyester backbone. When cured,Excel-Thane “MCU-250” is a CLEAR with a high gloss finish.

Other characteristics

Brand
Excel-Thane
Features

Abrasion Resistant, Acid Resistant, Alkali Resistant, Chemical Resistant, Cleanable, Good Brightness, High Gloss, High Performance, Oil Resistant, Solvent Resistant, Stain Resistant

Product Type

1K (1 component) Coating, Sealer, Solventborne Coating, Top Coat; 1K (1 component) Coating; Sealer; Solventborne Coating; Top Coat

Application Method
Brush, Roller, Spray
Compatible Substrates & Surfaces
Concrete
Color
Transparent
Carrier
Solvent-based
Markets
  • Building & Construction
  • Printing & Packaging
Basic Uses

EXCEL-THANE "MCU-250" and "MCU-400" CLEAR are designed to coat decorative concrete or concrete with decorative or natural aggregates. When applied at the proper thickness, these high solids and high performance sealers will minimize dirt and oil penetration. It is easily cleaned with water and detergent and provides a high gloss, bright appearance. EXCEL-THANE "MCU-250" and "MCU-400" CLEAR are extremely wear resistant compared to conventional sealers and coatings. They are resistant to most commonly encountered dilute acids, alkalis, organic solvents and oils as well as many dry chemicals. EXCEL-THANE "MCU-250" and "MCU-400" CLEAR are used as a topcoat in Excellent Coatings Decorative Aggregate Concrete Surfacing Systems. They will brighten an exposed aggregate, highlighting the color of the aggregate. In other areas where solvent containing coatings are allowed, these coatings are clear dress up top coats for other ECI Pedestrian Traffic Waterproofing Systems.

Shelf LIfe

Twelve (12) months after manufacture when continuously stored indoors in the original unopened metal containers at temperatures under 80°F.

Composition

Single component, solvent borne, clear, high performance, moisture cured polyurethanes. EXCEL-THANE "MCU- 250" and "MCU-400" CLEAR cure to yield a high gloss finish in order to maximize stain resistance. The physical properties of cured EXCEL-THANE "MCU-250" and "MCU-400" CLEAR are effective for extended periods of exterior exposure.

Cure
Moisture Cure
Limitations

Limitations: Containers that have been opened must be used within one or two days, since the product is a moisture-reactive material that will gel or set up when exposed to air. Keep lid tightly sealed when material is not in use. This material contains flammable and combustible solvents. EXCEL-THANE "MCU-250" and "MCU-400" CLEAR cure faster when applied under warm temperature and high humidity conditions and slower when applied under cool temperature and low humidity conditions.

Precaution

Personnel applying the coating should wear protective clothing and gloves, avoid contact of material with skin or eyes, and avoid breathing vapors. Mix and apply in well ventilated areas and observe normal safety precautions. Keep materials away from heat, sparks, and flames. Do not allow use of spark producing equipment during application and until all solvent vapors are gone. Post "No Smoking" signs. Store materials in a dry place at temperatures between 50°F and 85°F. THIS PRODUCT IS FOR PROFESSIONAL USE ONLY.

Installation

Surface Preparation: All surfaces to be coated must be clean, dry and free of all contaminants. It is recommended that concrete be cleaned by sandblasting or mechanically grinding. Metal surfaces must have no oxidation present prior to coating. Ceramic tile should be degreased and stripped to remove any wax on the surface and possibly sanded. Wood and aggregate should be cleaned with a detergent and rinsed with water under high pressure and allowed to dry. The appropriate primer or base coats should be used in all cases. Caution: Cured EXCEL-THANE "MCU-250" and "MCU-400" CLEAR may be slippery and may require the use of skid-resisting or texturing aggregate.

Technology
Ready-to-Use Products

Technical data

Table 1 of 1

14 rows
CharacteristicValueUnitMethod
Solids Content (By Volume)52.49 - 53.51—D-1353-78
Volatile Organic Compound (VOC) Content250.0grams/literCalculated
Weight Per Gallon9.6 - 10lbsD-1475-60
Viscosity (77°F)500 - 700cpsD-2393-80
Cure Time (77°F, 50% R.H., 5 mils, Dry to Touch, 36 hours through Cure)4 hourshours—
Coverage (8 mils, Dry Film)100.0sq ft/gallon—
Flash Pointmax. 110°FD-1310-82
Tensile Strength4500 - 5500psiD-412-80
Ultimate Elongation173.25 - 176.25%D-412-68
Hardness90.0Shore A—
Moisture Vapor Transmission (10 mils)0.2permsD-3389
Abrasion Resistance (Inch loss, C-502 Tabor Abrasion, 1000 Rev. with 1000 Gm. Weight, CS-17 wheel)Less than .001——

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