Urethane Primer Surfacer A premium acrylic urethane primer surfacer designed as a high build easy sanding primer surfacer that resists sand scratch swelling and shrinkage. 2K Urethane Primer has excellent adhesion and flex proper- ties. The resins utilized in this formula offer excellent color holdout and are ideal for urethane top coats and base coat clear coat systems. Part # Description Size 8441 Urethane Primer- Buff Gallon 8442 Urethane Primer- Buff Quart 8443 Urethane Primer- Gray Gallon 8444 Urethane Primer- Gray Quart 8141 Urethane Primer Standard Catalyst Quart 8142 Urethane Primer Standard Catalyst 1/2 Pint 8143 Urethane Primer FAST Catalyst Quart
Substrates • Fully cured finishes - Sand with 240 - 320 grit paper • Steel, Galvanized & Aluminum - Sand with 80 - 180 grit paper • Fiberglass & SMC - Sand with 150 - 240 grit paper • Always clean surface prior to application with 5900 or 5911 wax & grease remover. Mixing Full Body Primer Medium Build Primer Sealer 4 parts Urethane Primer 4 Primer 4 Primer 1 part Urethane Catalyst 1 Catalyst 1 Catalyst 1/2 Urethane Reducer 2 Urethane Reducer Set up Tech Info Tip/Needle: 1.5mm to 1.8mm Spot Air Pressure: 35 - 45 psi / HVLP 5 to 10 psi at cap Overall Air Pressure: 45 - 55 psi / HVLP 5 to 10 psi at cap HIgh Build Sealer Viscosity (#2 Zahn) 20-25 sec. 16-18 sec. Film Build: 2.5 - 4.5 mils 0.8 -1.2 mils Coverage: 555 @ 1 mil 308 @ 1 mil Application Apply 2 to 3 medium wet coats to fill sand scratches, minor imperfections, and build low areas. Allow 10-15 minutes between coats. As a sealer apply 1 full wet coat. Drying Sand Standard Catalyst 2-4 hours Fast Catalyst 1 -2 hours Recoat Cure 3 hours before recoating with additional primers, sealers or color topcoat. Recoat within 12 hours. Pot Life 3 - 4 hours
Physical Data Volume Solids RTS
34.6% @ 4:1 19.21% @ 4:1:2 4.8 lb./g as primer 5.8 lb./g as sealer
VOC RTS:
Humidity Resistance: Salt Spray Test: Lead & Chromate Levels
Excellent Excellent
Lead & Chromate Free
Master Tips If shop or substrate temperature is below 60°F, urethane accelerator recommended. Curing process of isocyanate products are severely inhibited below 60°F. Primer should be recoated or topcoated within 12 hours. If not topcoated within 12 hours, sand with 500 grit paper before recoating with primer, sealer, or color topcoat. Retarders - Recommended only in severe heat and humidity. Flex Agent - Recommended when repairing flexible substrates OFF the vehicle.
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