2K Primer BF9930

Product Features

This product is a two-component fast-drying primer that offers excellent protection and adhesion for general metal substrates. It dries quickly and is easy to sand, making it particularly suitable for quick repairs and full vehicle refinishing as a protective undercoat.

Product Mixing Rates

BF9930 2K Primer 4
BF7750 4:1 2K curing agent 1
BF6610 Thinner 2±20%

Instruction

  • Before use, mix thoroughly according to the ratio, adjust viscosity to 16-18 seconds/4 cups at 25°C, spray 2 coats, with a film thickness of 25-45μm.

  • Flash dry for 10-15 minutes at 70-80°C, bake for 60 minutes, or air dry for 6 hours at 25°C.

  • The usable time after mixing the paint is 6 hours at 25°C.

Cautions

  1. It is not advisable to apply too thick a coat at once; each layer requires a certain flash-off time.
  2. To ensure the best spraying results, please use the corresponding hardener and thinner.
  3. The coating must be completely dry before sanding, otherwise issues like sandpaper sticking or sanding marks may occur.

Technical Data

Inspection items Technical indicators Inspection method
Material Status in Containers Easy to stir evenly without foreign matter GB/T 3186
Fineness, μm ≤30 GB/T 1724
Viscosity, Coated-4 cup,25°C,s ≥80 GB/T 1723
Solids content (120°C, 2h)% ≥60 GB/T 1725
Storage Stability, Grade Precipitability ≥ 8 grade and crusting ≥ 10 grade GB/T 6753.3
Viscosity, Coated – 4 cup, 25°C, s 16-18 GB/T 1723
Dryness Surface Drying , 25°C ≤20min GB/T 1728
Completely dry, 25°C ≤6h
Drying, 70-80°C ≤30min
Hardness, pencil hardness tester ≥H GB/T 6739
Adhesion, Grid method, Grade ≤1 GB/T 9286
Adhesion between layers Great
Flexibility,mm 1 GB/T 1731
Impact strength,cm 50 GB./T 1732
Grindability(20 times) Easy sanding, non-stick sandpaper GB/T 1770
Waterproof,240h Non-foaming, non-wrinkling, non-falling GB/T 5209
Nitrogen resistance No biting, no bleeding GB/T 13493.4.18
Damp heat resistance(120h),Grade ≤1 GB/T 1740
Acid resistance(0.05mol/1 H2SO4),24h No foaming, no peeling, slight discoloration allowed GB/T 9274
Alkali resistance (0.1 mol/1 Na0H),24h No foaming, no peeling, slight discoloration allowed GB/T 9274
Salt Spray Resistance Series A (240h),

Series B (168h), Grade

 ≤1 GB/T 1771

Package and Storage

The standard  packing: 4kg or 20kg.

The product shelf life is 1 year at 25°C. Expired products can be used if tested, at your own risk.