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Dura-Coat PU400

technical data sheet

DESCRIPTION AND RECOMMENDED USES: Dura-Coat PU400 is an odorless, cross-linked, waterborne aliphatic urethane coating, containing no volale solvents, isocyanate, or other hazardous materials. Recommended for interior and exterior topcoat applications including, metallic structures, storage tanks, high-traffic use such as sport floors or high-traffic retail environments. It cures at room temperature, and it exhibits rapid hardness development and early water resistance. It offers a unique balance of toughness, aesthetics, and abrasion resistance. Dura-Coat PU400 topcoat comes in clear gloss and several colors. It is extremely weatherable and abrasion-resistant and will retain its appearance for long periods in a variety of environments. For use over NRX primer, Dura-Coat epoxies, or properly prepared surfaces, in areas subjected to UV.
The aliphatic nature of this product offers excellent non-yellowing properties.

  • Odorless, safe and non-toxic
  • Contains no volale solvents, isocyanate or other hazardous materials
  • Rapid hardness development
  • Fast drying; allows mulple applicaons in a single day
  • Resistant to water, common household chemicals and cleaners
  • Excellent adhesion to epoxy primers and acrylic coangs
  • Outstanding UV resistance and gloss retenon Non-staining or yellowing
  • Excellent flexibility, abrasion, and scuff resistance

Packages

  • Size 1 GL | Reorder # PU400-1GL
  • Size 5 GL | Reorder # PU400-5GL

Product information

PropertyDescription
Single component with a cross-linker addive
Packaging5 gal | 1 gal
ApplicationAirless spray, brush, roller, etc.
Solids Content and VOCs32% solids by volume; zero VOC. Density: 1.28 kg/litre (10.8lb/US gal)
Coverage A two-coat applicaon (over primer) is required in most applicaons 9.2m² /l @ 1.2mils (60 microns) DFT
Shelf Life36 months from the date of producon if stored properly in original, unopened and undamaged sealed packaging
Storage CondionsStore in sealed containers at 42–95°F (5–35°C)

Technical data

PropertyTest DescriptionResults
Application TemperatureN/A12°C/59°F to 30°C/86°F
Initial Set Time@ 70°F/20°C2 hours
Recoat Time@ 70°F/20°C4 hours
Normal foot traffic@ 70°F/20°C10-12 hours
Ultimate Cure@ 70°F/20°C7 days
GlossASTM D523, 60°88-90 (high gloss finish); 8-10 (ma finish)
Adhesion to Steel/ConcreteASTM D4541>870 psi or 6 MPa
Abrasion ResistanceASTM D4060 (CS17, 1 kg, 1K)<29 mg loss
Mar-Scratch ResistanceASTM D51789080
Scratch Resistance200 scrubs with a weighted abrasive pad90 (100=no change in gloss)
Shoe Heel ResistancePendulum Scuff Test, 10=no scuff marks9 (pass)
Gloss Availability N/ATwo versions: Gloss and Matt

Application sheet

NOTE: Refer to Detailed Applicaon and Safety Instrucon Procedures. Product Training is Mandatory before applying Dura-Coat PU400.
 
Surface Preparation:
  • New concrete must be cured for a minimum of 28 days before applying Dura-Coat PU400. The substrate must be above 12°C (54°F) and must be free of all dirt, waxes, previously applied coangs, oil, grease, laitance, and any foreign maer that may interfere with the bond of the primer to the prepared substrate. Cracks and surface defects should be repaired before the application of the primer. Concrete surfaces to be coated should be mechanically cleaned to provide a clean tooth for the primer application. If acid-etching is the method of choice for the preparation of the concrete surface, the etched surface must be thoroughly flushed and dried for 24 hours before the application of the primer.
  • Dura-Coat PU400 adheres very strongly to epoxy coangs of all types. The epoxy floor to receive Dura-Coat
  • On metallic substrate, proper surface preparaon is crical to the long-term performance of this product. The exact requirements for surface preparaon vary with the severity of the application, expected service life, and the inial substrate conditions. NRX primer is recommended when abrasive blasting is not possible. Optimum preparation will provide a surface thoroughly cleaned of all contaminants and roughened to an angular profile between 75-125 μm (3-5 mil). This is normally achieved by initial cleaning and degreasing and then abrasive blasting to a cleanliness of White Metal (SSPC-SP10) or Near White Metal, followed by removal of residual abrasive blast residues from the surface to be coated.
 
Application:
  • Dura-Coat PU400 may be applied with a roller, spray or brush. A spray technique offers the best performance for film consistency and appearances. Maintain uniform thickness throughout surface. Remove excess before drying.
  • Air spray: suggested equipment, or equivalent: Nozzle size 1.8- 2.0 mm and atomizing air 2.8-3.2 bar.
  • Airless spray: Tip orifice is 0.013 to 0.017″, atomizing pressure: 2000 psi.
  • Roller application: It must be noted that every contractor has his/her own technique for applying a clear coating to obtain an attractive and defect-free finish. Ideally a lint-free 9 mm nap roller is used to apply Dura-Coat PU400. On larger jobs, we recommend using a commercial 18″ roller.
  • Apply the coating, with a minimum pressure, in a uniform consistent pattern in a one pass application to provide an even coat. DO NOT ALLOW THE FRESH EDGE OF THE COATING TO DRY. If the coating begins to “clarify” (begins to change from milky white to clear), the coating is curing. Do not roll back into this coating at this stage, as this will create lap marks, hazing, and other differences in the cured coatings appearance. Also avoid heavy applications and puddling. Two to three coats at a coverage rate of 300-500 sq. ./U.S. gallon is recommended depending on the porosity of the surface being coated. Allow 4 hours drying me between coats or 12-16 hours for traffic.

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