PPG AquaCover 20 (also known as Sigma Aquacover 20), is a one-component waterborne, high-build zinc phosphate primer/coating, based on acrylic dispersion. A fast-drying primer/coating with excellent adhesion to pre-treated steel. It can be overcoated with most waterborne acrylics, solvent-borne epoxy coatings and alkyd paints, as well as certain solvent-borne, two-component products.

Top Features & Benefits

• One-component waterborne, high-build zinc phosphate primer/coating, based on acrylic dispersion
• Useful for when solvents are not permitted because of health and safety reasons
• Fast drying - touch dry in just 30 minutes
• Anti-corrosive
• Can be overcoated with most waterborne acrylics, solvent-borne epoxy coatings and alkyd paints, as well as certain solvent-borne, two-component products
• 570+ colour options including RAL and BS shades

Product Data

Basic data at 20°C (68°F)

Notes:

• Refer to tables below for information regarding spreading rate and film thickness, overcoating intervals and curing times

Preparation & Application

Recommended Substrate Conditions & Temperatures

Substrate conditions

• Steel; blast cleaned to ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Steel; pretreated according to ISO-St3
• Shop primed steel; sweep blasted or power tool cleaned to SPSS-Ss or SPSS-Pt2

Substrate Temperature & Application Conditions

• Substrate temperature during application and curing should be above 5°C (41°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
• Relative humidity during application and curing should not exceed 75%

Instructions For Use

Stir well before use

• The temperature of the paint should preferably be above 15°C (59°F), otherwise extra thinner may be required to obtain application viscosity
• Too much tap water results in reduced sag resistance
• Must be protected from freezing at all times during storage and/or transport

Application

Air spray

Recommended Thinner

• Tap water

Volume of thinner

• 5 - 10%, depending on required thickness and application conditions

Nozzle orifice

• 1.8 – 2.0 mm (approx. 0.070 – 0.079 in)

Nozzle pressure

• 0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)

Airless spray

Recommended Thinner

• Tap water

Volume of thinner

• 0 - 5%, depending on required thickness and application conditions

Nozzle orifice

• Approx. 0.46 – 0.53 mm (0.018 – 0.021 in)

Nozzle pressure

• 12.0 - 15.0 MPa (approx. 120 - 150 bar; 1741 - 2176 p.s.i.)

Brush/roller

• Long haired brush or polyether roller with rounded edges

Recommended Thinner

• Tap water

Volume of thinner

• 0 - 5%

Cleaning solvent

• Tap water and THINNER 70-05

Cleaning procedures

• Pulsator filter and tip filter must be taken out of the equipment and cleaned properly
• The following tables illustrate the cleaning procedure of the spray equipment when changing from spraying with solventborne paint to waterborne paints (table 1) and from waterborne paints to solvent-borne paints (table 2)

Additional Data

Note:

• Surface should be dry and free from any contamination

Safety Precautions

Although this is a waterborne paint, care should be taken to avoid inhalation of spray mist, as well as contact between the wet paint and exposed skin or eyes.