Quantum 4599 Primer Sealer Base White Quart
Quantum Quantum
  • Quantum 4599 Primer Sealer Base White Quart
  • Quantum 4599 Primer Sealer Base White Gallon

Quantum 4599 Primer Sealer Base

Quantum 4599 Primer Sealer Base is the base component of a two-part, fast-drying primer sealer system that can be used as a spot primer on a finished, primed surface to seal underlying products where breakthrough has occurred, or as a finish primer on prepared fiberglass and gelcoat surfaces where fairing and surfacing are not required. Overcoat with Quantum 99 Polyurethane Topcoat for a smooth, glossy finish and improved topcoat durability.

Quantum 4599 is easy to mix at a 4:1 ratio with Quantum 99 Spray Activator (required, sold separately), and easy to apply by HVLP or conventional spray gun, with excellent flow and leveling properties. This fast drying primer system can be overcoated with Quantum Quantum 99 Polyurethane Topcoat after 1 hour - without sanding.

Available in White, in Quart and Gallon sizes. Note: Requires Quantum 99 Spray Activator.

$59.92 / qt
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Tech Spec Product Info User Generated Content

Quantum 4599 Primer Sealer Features

  • Easy to use, fast-drying, non-sanding primer.
  • Ideal for filling porosity.
  • Can be overcoated with Quantum99 Topcoat in as little as 1 hour @ 72°F
  • Provides a quick turnaround time—prime and paint in 1 day.


  • Components: Two. Quantum 99 Urethane Spray Activator sold separately.
  • Mix Ratio: 4:1 (4 parts Quantum 4599 Base to 1 part Quantum 99 Spray Activator)
  • Induction Period: 10 minutes. Allow mixed base and activator to stand
  • Color: White
  • Finish: Satin
  • Application Method: HVLP or conventional spray equipment (see details below)
  • Spray Application: Apply in 1 to 2 uniform coats to desired smoothness and coverage.
  • Dry Time to Sand: Sanding is not required up to 72 hours @ 72°F prior to topcoat application. 4599 can be nib sanded in 45 min. @ 72°F
  • Overcoat Time to Overcoat: After 1 hour @ 72°F, 4599 can be overcoated with Quantum 99 Polyurethane Topcoat.
  • VOC Content (Admixed): <420 g/L
  • Volume Solids (Admixed): 42.5 +/- 2%
  • Viscosity (Admixed): 16'' Zahn #2
  • Pencil Hardness: 2H
  • Coverage @ 1 mil (no loss): 675 sq.ft./gallon
  • Coverage @ 3 mils (no loss): 225 sq. ft./gallon
  • Shelf Life: 2 years from date of manufacture.
  • Surface Cleaner: Quantum SR-002 Surface Prep Cleaner
  • Reducer: Quantum 99 Spray Reducer

Surface Preparation:

  • All surfaces: Use water, a mild abrasive detergent and a scouring pad to degrease surfaces prior to sanding.
  • Gelcoat/fiberglass: Abrade with 180-220 grit sandpaper.
  • Wood: Abrade with 180-220 grit sandpaper.
  • Previously painted surfaces: If no corrosion byproducts are present, abrade with 180-220 grit sandpaper to remove gloss.
  • Metal: Prime with Quantum 45 Chromated Epoxy Primer or Quantum Epoxy Surfacing Primer (both sold separately) prior to 4599 Primer Sealer application.
  • NOTE: Quantum 4599 Primer Sealer is not recommended for direct-to-metal (DTM) application
  • Solvent clean prior to application. Use Quantum Surface Prep Cleaner (sold separately) to remove contaminants.

Spray Equipment

  • Refer to the manufacturer's directions for gun recommendations.


Spray Gun Type  Nozzle Size  Air Pressure 
Conventional Siphon Feed  1.2 - 1.4 mm  28-32 psi 
Conventional Gravity Feed  1.2 - 1.4 mm  28-32 psi 
Conventional Pressure Feed  0.8 - 1.2 mm at 8-10 oz./min.  28-32 psi 
HVLP Gravity Feed  1.2 - 1.4 mm  8-10 psi at cap 
HVLP Pressure Feed  0.8 - 1.2 mm at 8-12 oz./min.  8-10 psi at cap 
Caution: Application of these product systems requires recommended temperature/humidity conditions and film thickness ranges. The material, hangar, and substrate temperature should be no lower than 45°F before, during, and after application. Do not apply paint materials to surfaces less than 5°F above the dew point, or to surfaces warmer than 125°F. Substrate temperature should be minimum 45°F to maximum 125°F.

Please refer to the Primer Sealer Base Tech Data sheet for details regarding surface preparation and application.

BRAND: Quantum
Number Of Parts: Two Part
Type: Primer
5.0 1

High Build


I have used a lot of other products but found this primer to be a great high build primer that levels great and easy to sand for there top coat.

Puget Sound Small Boats

Tacoma Wa


Quantum 4599 Primer Sealer Base



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