PPG - Sigmazinc 19  is a one-component, zinc-rich epoxy primer with good anti-corrosive properties.

Features

• Good anticorrosive properties, the dry film contains 90% zinc by weight
• Designed for repair of two-component zinc epoxy primers and zinc silicate primers
• Can be used as a reconditioner for aged, derusted, galvanized steel
• Dries at temperatures down to –10°C (14°F)
• Dry heat resistance 125°C (260°F)with peaks up to 175°C (350°F)
• The superimposed system must be unsaponifiable
• Quick-drying, can be overcoated after a short interval

Recommended Substrate Conditions and Temperature

Substrate Conditions

• Steel; blast cleaned to ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Aged hot-dip galvanized steel with rusty spots; thoroughly derusted to ISO-St3 or ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Zinc rich epoxies and zinc silicates must be dry and free from any contamination

Substrate Temperature

• Substrate temperature during application at -10°C (14°F) is acceptable; provided the substrate is free from ice and dry
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point

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.
• Adding too much thinner results in reduced sag resistance. Adequate ventilation must be maintained during application and curing (please refer to INFORMATION SHEETS 1433 and 1434).

Air Spray

Recommended thinner:

PPG Thinner 91-79

Volume of thinner:

20 - 25%, depending on required thickness and application conditions

Nozzle orifice:

1.5 – 3.0 mm (approx. 0.060 – 0.110 in)

Nozzle pressure:

0.2 - 0.3 MPa (approx. 2 - 3 bar; 29 - 44 p.s.i.)

Airless Spray

Recommended thinner:

PPG Thinner 91-79

Volume of thinner:

20 - 25%, depending on required thickness and application conditions

Nozzle orifice:

Approx. 0.43 mm (0.017 in)

Nozzle pressure:

10.0 - 15.0 MPa (approx. 100 - 150 bar; 1451 - 2176 p.s.i.)

Brush/Roller

Recommended thinner:

PPG Thinner 91-79

Volume of thinner:

0 – 3%

Cleaning Solvent

PPG Thinner 90-53