DOLPH AC-43 is a clear, air-drying insulating finishing varnish based on polyurethane. AC 43 dries very quickly and can be applied via coating, dipping and spraying. Its good coating performance and glossy finish ensure that it offers excellent protection against moisture, abrasion and chemicals. Due to its extremely high thermal resistance, still thermal class F (155°C), AC 43 is used for applications with higher thermal demands The internal varnishing of electric motors and the varnishing of transformers are classic applications. It is also suitable for a wide range of electrical engineering and electronic applications. Motor housings, field coils, solenoid coils, conductor rails, terminal boxes, collector rings, fuse tubes, collector connections, control coils, printed circuit boards.

Features & Benefits

  • Quick drying
  • Toughness and flexibility
  • Good penetration
  • Heat resistant
  • Fast cure cycles
  • Solderable
  • Acid and alkali resistant
  • UL Systems to 180°C
Color/Appearance Light-Dark Amber
Flash point 54°F
Density @ 77°F (25°C) Lbs/gal 7.0 - 8.0
Dielectric Strength, ASTM D-115, volts/mil Dry 2,000
Dielectric Strength, ASTM D-115, volts/mil Wet 1,200
Film Build, mils/side, ASTM D-115 1 - 1.5
Thinner (Solvent) T-200X
Viscosity @ 77°F (25°C) Brookfield Viscometer CPS 20 - 70
Packaging 1 Gal. Can
Weight 8.0
Air Drying Time on Copper Strip, ASTM D 115, minutes Set to Touch 10
Air Drying Time on Copper Strip, ASTM D 115, minutes Tack Free 60
Viscosity Dolph’s viscosimeter @ 77°F 15 – 20 sec.
VOC content, ASTM D 6053, lbs/gal 4.3