Paint Flux

Alumakote™ Paint Flux

Liquid aluminum brazing flux engineered for automated spray applications in high-volume heat exchanger production. NMP-free formulation with minimal nozzle clogging and superior post-braze appearance.

558–572°C
Active Range
400–500
Typical Viscosity (cP)
10–40%
Flux Content
3
Formulations

Product Overview

Alumakote™ Paint Flux is a water-based liquid brazing flux designed for automated spray application onto aluminum heat exchanger components. The organic water carrier system eliminates NMP (N-methyl-pyrrolidone), improving operator safety and environmental compliance.

Three distinct formulations address different production environments: the standard version for most CAB applications, the Cesium variant for magnesium-bearing alloys, and the Binder formulation as a concentrated spray mix. All versions are optimised for minimal nozzle blockage and even flux distribution across complex fin and tube geometries.

Key Features

  • Minimal nozzle clogging — optimised for continuous spray lines
  • Consistent flux distribution across fins and tubes
  • Clean burn-off — no post-braze residue issues
  • NMP-free organic water carrier system
  • Enhanced post-braze appearance and corrosion resistance
  • Low settling — extended pot life in spray systems
  • Cesium variant available for Mg-bearing aluminum alloys
  • Application rate: 0.1–0.5 g/m

Formulations — Technical Comparison

Property Alumakote™ Standard Alumakote™ Cesium Alumakote™ Binder
TypeLiquidLiquidLiquid (concentrate)
Active Temperature Range564–572°C558–568°CPremix — see datasheet
Application MethodAuto-dispense / SprayAuto-dispense / SpraySpray
Viscosity500–2,000 cP500–2,000 cPConcentrate
Flux Content10–40%10–40%—
Cesium FluorideNoYesNo
NMP-FreeYesYesYes

Physical Properties (Standard Formulation)

PropertyValue
AppearanceWhite opaque liquid
pHNeutral
Boiling Point100°C (212°F)
Specific Gravity @ 25°C1.04
Density1.01–1.02 g/cm³
Typical Viscosity400–500 cP
Application Rate0.1–0.5 g/m
Carrier SystemOrganic water-based (NMP-free)

Chemical Composition

ComponentRoleNotes
Potassium Aluminum Fluoride (KAlF₄)Primary flux agentRemoves oxide layer during brazing
Cesium Fluoride (CsF)Optional additiveCesium variant only — Mg-bearing alloys
Carrier / BinderVehicleNMP-free organic water carrier

Packaging

1 lb 10 lb 20 lb 50 lb 10 kg 13 kg 20 kg 25 kg 55 gal drum 200 L drum

All sizes supplied in plastic containers or drums as indicated. Custom fill volumes available on request.

Request Technical Data Sheet

Full TDS, SDS, and spray application guidelines available on request.

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