Waterborne Primer Surfacer
An air-dry, waterborne primer
designed for maximum performance
and process throughput.
This innovative waterborne primer
combines optimal throughput
capability with superior adhesion
and corrosion resistance properties,
making it the ideal choice for use
with the Aquabase® Plus basecoat
system. Currently available in gray;
white and black options will be
• Dry to handle immediately after flash
• Dry to sand in 30 minutes after final coat flashes
• Superior leveling properties
• Easy to sand
• 24 hour pot life
• No need for sealer if topcoated with waterborne basecoat
• Significant time savings over conventional primer surfacers
• Built-in rust inhibitor provides superb corrosion resistance
• Excellent topcoat adhesion
• Suitable over properly prepared metal, plastic, E-coat, and OEM or refinish paints.
• Full SG-Shade capability available soon
• Air-dry capability reduces need to heat the spray booth, thereby saving on energy costs
Frequently Asked Questions
Question: What is the recommended use of P950-5505?
Answer: P950-5505 is a waterborne primer-surfacer recommended for small to medium size spot repairs.
Question: Can P950-5505 be used direct-to-metal?
Answer: Yes. P950-5505 applied over properly prepared metal will provide an optimal level of adhesion and corrosion resistance. Proper film build of P950-5505 is critical when applying direct-to-metal, therefore a minimum of 2.5 mils is required after sanding and prior to top coat.
Question: How can waterborne primer be used over bare steel without causing rust?
Answer: P950-5505 contains a flash rust inhibitor and can be applied directly over properly cleaned and sanded steel.
Question: Can P950-5505 be used direct-to-plastic?
Unprimed Plastic: An appropriate Nexa Autocolor adhesion promoter is required for application of P950- 5505 to unprimed plastic substrates.
Primed Plastic: P950-5505 can be applied directly to properly cleaned and sanded primed plastic substrates.
Question: What is the recommended spray gun* setup for P950-5505?
Answer: Fluid Tip Size: 1.6 – 1.9 mm.
Air Pressure: HVLP: 10 PSI at the cap.
Compliant: 25 – 35 PSI at the gun.
*Note: P950-5505 must be applied using a spray gun designed for use with waterborne products.
Question: What is the reduction of P950-5505?
Answer: P950-5505 is reduced with P980-5000 Thinner at 10% by weight or 13% by volume. Reduction accuracy is critical, therefore it is recommended to reduce by weight using a mixing scale. Reducing by weight is NOT the same as reducing by volume! P935-1250 Adjuster is not recommended for use with P950- 5505. Note: for proper agitation, thoroughly hand shake P950-5505 prior to reduction.
Question: How is P950-5505 applied?
Answer: P950-5505 is applied similar to a urethane primer-surfacer, with 3 - 5 wet coats, achieving a dryfilm of 0.8 – 1.0 mil per coat. P950-5505 must be blown dry to a matte finish between coats similar to how waterborne basecoat is dried using auxiliary air amplifiers. Note: Applying “heavy” coats will slow the process by increasing the flash between coats and final dry time. P950-5505 optimal speed performance is best achieved through the application of medium coats.
Question: What is the recommended dry time before sanding?
Answer: After the final coat of P950-5505 has completely flashed to a matte finish, air dry for 30 minutes before sanding. Note: humidity will affect dry times.
Question: Can P950-5505 be force dried with heat?
Answer: Yes, but due to the quick air-dry characteristics of P950-5505 force drying with heat is not necessary.
Question: Can a guide coat be used on P950-5505?
Answer: Yes. It is recommended to use the dry powder type guide coats. Using 1K lacquer or enamel guide coats will negatively affect sanding characteristics.
Question: What grit sandpaper is recommended?
Answer: Finer grit sandpapers are recommended, starting with 220 grit or finer sandpaper. Sanding cutthrough areas can easily be addressed by re-applying P950-5505 and re-sanding. P950-5505 eliminates the need for aerosol cut-through primers.
Question: Can P950-5505 be wet sanded?
Answer: Yes. Once completely dried after 30 minutes, P950-5505 can be wet sanded. Water will not soften or remove dried P950-5505.
Question: What cleaners are recommended for use with P950-5505?
Answer: P950-5505 can be cleaned with P850-1402, SXA330 or SWX350. The use of glass cleaners and other ammonia-based cleaners are not recommended.
Question: Can P950-5505 be used as a sealer/spot sealer?
Answer: No. P950-5505 is a primer-surfacer and NOT a sealer.
Question: Can basecoat be applied directly to sanded P950-5505?
Waterborne Basecoat: Yes. Waterborne basecoat can be applied directly to sanded P950-5505. For optimal performance, a sealer is recommended.
Solventborne Basecoat: No. Sanded P950-5505 must be sealed before applying Solventborne basecoat.
Question: What is the pot life of P950-5505?
Answer: 24 hours when stored in sealed, plastic containers. P950-5505 is a 1K primer and requires no activation.
Question: Can I keep P950-5505 in my spray gun overnight?
Answer: No. While P950-5505 has a 24 hour pot life when stored in sealed, plastic containers, it is not recommended that P950-5505 remain in a spray gun overnight. For best practice, it is recommended that spray guns be cleaned after use with P980-8212 Aquabase Plus gun wash.
Refer to P950-5505 Waterborne Primer Surfacer technical data sheet RM3170 for additional information.