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    HS Master 4:1

    Acrylic primer

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    Variants

    color

    art. nr.

    capacity

    quantity per carton

    grey

    1328

    0,8 l + 0,2 l

    6

    white

    6327

    0,8 l + 0,2 l

    6

    black

    6328

    0,8 l + 0,2 l

    6

    Gloss grade

    matt

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    Technical documentation

    Safety data sheet - component A Safety data sheet SDS - component B Technical data sheet TDS Catalog of products MASTER 2023

    Description

    2K high build acrylic primer for car body repairs. Basic primer with good coverage and strong filling. Features very good adhesion to aluminum and steel surfaces as well as great vertical stability.

    Advantages

    • Easy to mix and apply.
    • Short curing time.
    • Good filling properties.

    Substrates

    Acrylic Filler HS MASTER 5:1 can be applied over:

    • Steel and aluminum after flatting and degreasing.
    • Polyester glass laminates (GFK/GRP).
    • 2K polyester body fillers and putties.
    • Wash primers.
    • 2K epoxy primers.
    • Old finishes in good condition after matting and degreasing.

    Good preparation is necessary for achieving best results.

    Following sandpaper gradations are recommended:

    • by hand (dry or wet): P280÷P320 (GRP P400),
    • by machine (dry): P180÷P220.

    Important informations

    degrease

    mixing ratio
    4 : 1 + 15÷20%

    spraying viscosity
    30÷50 seconds at 20°C

    pot life for the mixture
    about 60 minutes at 20°C

    2÷3 layers
    about 80 µm for each layer

    between layers
    5 minutes

    before baking
    10 minutes

    drying time
    for total thickness of 200 µm
    about 3÷4 hours at 20°C.
    about 30 minutes at 60°C.

    P360 ÷ P500

    P600 ÷ P1000

    Application process

    Use

    For car repairs as a filling primer.

    Mixing proportion per volume

    Primer: 4 parts
    Hardener: 1 part
    Thinner: 15÷20%

    Stir thoroughly until achieving homogenous mixture.

    Spraying viscosity

    30÷50 seconds at 20°C

    Pot life

    Approx. 60 minutes at 20°C.

    Number of layers

    2÷3 layers; 80µm for a single layer.

    Parameters for RP spray gun
    Nozzle: 1,6÷2,0 mm; Pressure : 2,0-2,2 bar.

    Parameters for HVLP spray gun
    Nozzle: 1,5÷1,9 mm; Inlet pressure: 2,0 bar.

    Flash off time

    Between layers: approx. 5 minutes
    Before baking: approx. 10 minutes

    Flash off time depends on temperature and film thickness.

    Drying time

    For thickness 200 µm
    Approx. 3÷4 hours at 20°C.
    Approx. 30min at 60°C.

    Temperatures below 20°C significantly increases the drying time.

    IR drying

    150÷200µm: 10÷15 minutes under short wave.

    Do not exceed 60oC.
    Use as recommended by the equipment manufacturer.
    Wait about 10 minutes before starting the heater drying.

    Dry sanding

    Machine sanding: P360÷P500.
    Manual sanding: P280÷P320.

    Wet sanding

    Machine sanding: P600÷P1000.
    Manual Sanding: P800÷P1000.

    Further work

    2K acrylic primers can be directly over coated with:
    - 2K acrylic top coats.
    - 1K base coats.


    General notes

    - Do not exceed recommended doses of hardener!
    - The best repair results you can achieve at room temperature. Temperature in body shop and temperature of a product should be the same.
    - When working with 2K products, it is recommended to use personal protection equipment. Protect the eyes and air ways.
    - The rooms should be well ventilated.
    - Clean the guns and equipment immediately after use.

    Caution: To maintain safety, always follow the instructions given in the MSDS for the products.

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