PT-799 - POLYURETHANE

PT-799 Polyurethane is a high performance, two-component, polyurethane topcoat designed for exterior use on high performance, general aviation, business jet, and commercial aircraft. This coating is also used widely for industrial, oil and gas as well as by original equipment manufacturers. PT-799 Polyurethane meets, and exceeds,MIL-PRF-85285D/E Type I, II & IV Class H. This coating is on the NAVY QPD (QUALIFIED PRODUCTS DATABASE)FOR TY I, II & IV (GLOSS ONLY). These high performance coatings have excellent resistance to hydraulic jet fluid, fuel, crude oil, impact, salt and ultraviolet rays.

PT-799 Polyurethane is extremely durable with excellent color and gloss retention. PT-799Conductive black is also available. It is formulated as an electrically conductive paint which can be used for coating and sealing non-metallic surfaces by brushing or spraying. The Conductive Coating is intended for use where an electrostatic discharge path is required for electrical continuity on non-metallic substrates.

COLORS – ALL FEDERAL STD 595C. ALSO AVAILABLE IN CUSTOM COLORS AND GLOSS RANGES.

**Safety Data Sheet information applies to ALL PT-799 products EXCEPT for the Black.**

COATING PROPERTIES & CHARACTERISTICS

• Mix Ratio, by volume: 1 part Base to 1 part Catalyst
• Reducer: PT-1003 Type I
• Recommended Dry Film Thickness: 1 mil
• Hardness: Pencil Hardness – 5H Flexibility ¼ “ Mandrel – Passes
• Salt Spray: 1000 + Hours
• Admixed Viscosity: 15 seconds, max #4 Ford
• Admixed Weight per Gallon: 10.2 lbs.
• Admixed Solids By Weight: 65%
• Theoretical Coverage: 600- 800 sq. ft.²/gal.
• Pot Life: 4 hours
• Coatings VOC: 340 g/L

SHELF LIFE

Shelf life is only applicable for materials stored in unopened and undamaged original factory filled containers.1 year when stored at 50⁰-85⁰ F.

WEATHER & CHEMICAL RESISTANCE PROPERTIES

• Salt Spray per ASTM B117 (corrosion) 1000+ hours
• Humidity (Filiform) 1000+ hours
• Lubricating Oil Conforms to MIL-L-23699 24 hrs. at 250º F
• Hydraulic Fluid Conforms to MIL-H-5606/MIL-H-83282 24 hrs. at 150º F
• JP-5 Jet Fuel Conforms to MIL-T-5625 7 Days at Room Temperature
• Skydrol 500B Conforms to MIL-C-83286B 7 Days at Room Temperature
• Methyl Ethyl Ketone soaked cloth 100+ rubs Passes
• DS2 [1,5-Dichloropentane] Passes

The Chemicals listed below were tested at:

1 drop per day for five (5) days:

• Phosphoric Acid [10%] Passes
• Isopropanol [99%] Passes
• Acetone Passes
• Ethanol [99%] Passes
• Triton X-100 Passes

MIXING INSTRUCTIONS

Shake component A and B on a paint shaker for 5 – 10 minutes for optimal results. Admix by volume:

• 1 Part Component A (Base)
• 1 Part Component B (Catalyst)
• Add the Catalyst into the Base.

Admixed material should be allowed a 15-minute induction time for best application results.

Reduce: Use reducer PT-1003 Type I, 10% by volume. MEK can be used in small quantities.

• If using PTI additives to adjust the dry and cure times of the coating, please refer to those Product Data Sheets for specific instructions for admixing the material.

APPLICATION

This product can be applied using conventional air spray equipment, HVLP spray system. Please consult with a PTI representative for specific equipment recommendations and settings.

1. Make sure pots, guns, and lines are purged and cleaned.
2. Mix both base and catalyst thoroughly and filter/strain before spray application. NOTE: It is not recommended to strain flat/matte coatings.
3. HVLP Spray Pressure: 7-10psi. Convention Equipment Spray Pressure 15-30psi
4. Always air-blow and tack wipe the surfaces to be painted. Aircraft should be grounded to prevent static.
5. Best application results: apply 3 coats: 1 fog/tack coat & 2 full coats from 0.6 – 1 mil thickness.
6. Do not allow more than 48 hours to pass before applying the second coat.
7. Recommended Dry Film Thickness is 1-2 mils. Some colors may require thicker films to achieve hiding.
8. For wet sanding or buffing of coating, wait a minimum of 13 hours but not more than 26 hours.NOTE: If paint is allowed to cure for more than 48 hours wet sanding and buffing is not possible.
9. This coating will dry to an extremely hard but flexible finish. However, it can be wet sanded and buffed.For the best results wait a minimum of 13 hours but no more than 26 hours before wet sanding and buffing. PTI recommends that you use 600 grit wet sandpaper. If the paint cures for more than 48 hours wet sanding and buffing is not possible. If you are using the PTI additives "NO POP" or "NO PEEL" to slow the curing time, add four hours to the above times (a minimum of 17 hours but not longer than 30 hours). If you are using POLYKICK™ to accelerate the dry time of this product, wet sanding

NOTE: Application of PTI products requires the use of all OSHA approved safety equipment, including proper ventilation. Additionally, PTI products require the recommended temperature/humidity conditions and film thickness ranges for optimal performance. The material, hangar, and aircraft skin temperatures should be no lower than 75⁰ F / 25⁰ C before, during and after application.

DRYING & CURING SCHEDULE

Dry times are based on the dry film thickness between 1-2 mils (25-50 microns).

Air Dry Times:

(75⁰F / 25⁰C and 50% Relative Humidity)

Set to Touch: 6 hoursDry Hard: 12-15 hours

Recoat Time: 1 hour or tack dry. You can recoat without sanding up to 72 hours after application.

Accelerated Air Dry:

Use POLYKICK™ to reduce dry hard time to one hour or less. See technical data in ADDITIVES for POLYKICK™.

NOTE: ACCELERATING DRY TIME DOES NOT REDUCE THE TIME IT TAKES TO ACHIEVE A FULL CHEMICAL CURE. FULL CHEMICAL CURE REQUIRES A MINIMUM OF 7 DAYS.

Force Dry Times:

15 minute air dry before placing the painted part in the oven. Full chemical cure requires 2 hours at 225⁰F after the coating has dried hard.