5500 EX Medium Set PolyUrea/Polyaspartic

5500 EX Medium Set is an 87% solids, two-component aliphatic MDI polyurea-aspartic blend formulated for:

  • Extended working time compared to fast-set products.
  • High gloss, high-build finishes with exceptional clarity.
  • Non-yellowing and UV-resistant performance.
  • USDA compliance for incidental food contact.

Unique Characteristics

  • Ease of Use: Extended working time for easier application in larger areas.
  • Customizable: Tintable with ASTC pigments and available in low-odor versions.
  • Non-Skid Options: Incorporate ASTC’s “SSR” aggregate for additional safety.
  • Durability: High-build protection for floors with superior elongation and flexibility.



Advantages

  • UV stable and non-yellowing.
  • High stain resistance, including resistance to plasticizer migration from tires.
  • Excellent chemical and abrasion resistance.
  • Superior adhesion to concrete and existing topcoats.
  • Waterproof and elastomeric properties for robust performance.
  • Quick turnaround for floor applications.

Applications

5500 EX is ideal for:

  • Decorative concrete floor finishes.
  • Industrial, commercial, and residential floor coatings.
  • Clear topcoats for color chips and quartz.
  • Kitchen floors, slabs, stairs, and pedestrian walkways.
  • Exterior applications requiring UV stability.

Preparation

  1. Concrete Curing: Ensure a 28-day cure period.
  2. Surface Cleaning: Remove all contaminants, including oils, wax, and curing agents.
  3. Profile Creation: Abrade the surface to create a rough profile of 2-3 mils (ASTM D4259).
  4. Moisture Testing: Ensure moisture vapor transmission (MVT) does not exceed 3 lbs per 1,000 sq ft per 24 hours.

Priming

  • Self-Priming: 5500 EX can be applied directly to concrete.
  • Optional Primers: Use ASTC’s 6000 Series Epoxy Primer, 7001 Pen Prime, or 8000 CMW as needed.




Application

  1. Mixing:
    • Combine components A and B at a 1:1 ratio using a jiffy mixer.
    • Mix for 1-2 minutes without incorporating air.
    • Add pigments if required, ensuring uniform dispersion.
  2. Coating:
    • Apply with a notched squeegee and back-roll with a 1/4”-3/8” nap roller.
    • Maintain a thin coat (5-10 mils) for best results.
  3. Recoat Timing:
    • Recoat within 1-2 hours or after light sanding if exceeded.

General Physical Characteristics

Characteristic

Details

Solids

87%

Hardness (ASTM D2240)

Shore A 85, Shore D 50

Gel Time

20 minutes at 75°F

Elongation

50-60%

Compression Strength

24 hrs: 11,200 psi; 7 days: 14,100–19,000 psi

UV Resistance

Excellent

Pot Life

25 minutes at 75°F

Special Considerations

  • Cold Conditions: Use 5500 Fast Set for applications below 50°F.
  • Hot Conditions: Use 5500 HH or HHH in environments above 85°F with high humidity.
  • Chemical Resistance: Resistant to a wide range of chemicals, including acids, ethanol, and motor oil.




Chemical Resistance Chart

Chemical

24 hrs

7 days

10% Acetic Acid

+

Yellowing

100% Ethanol

+

+

Sulfuric Acid (50%)

+

+

Motor Oil

+

+

Brake Fluid

+

Slight Blister

Mustard

Yellowing

Limitations

  • Avoid application on wet surfaces or in environments with high moisture vapor drive.
  • Not all tires are tested for plasticizer staining.
  • Store kits in a cool, dry environment away from sunlight.
  • For professional applicators only. Refer to the MSDS before use.

Pigment Color Chart

Medium Gray
Medium Gray
Pearl Gray
Beige
Beige
Camel Tan
Whisper Gray
Whisper Gray
Charcoal
Charcoal
Fog Gray
Fog Gray
Mocha
Mocha
Flake Gray
Light Gray
Wheat
Wheat
Grizzly Gray
Grizzly Gray
Safety Red
Safety Red
Portland Gray
Portland Gray
Safety Yellow
Black
Black
White
White