PPG SigmaTherm 175 is a heat-resistant modified alkyd aluminum finish that offers heat resistance up to 175°C (350°F). 

Features & Benefits

• One component
• High-brilliancy
• Spray application improves the appearance
• Heat resistant up to 175°C (350°F)
• A minimum drying time of 3 days at 20°C (68°F) should be allowed before exposure to heat
• Touch dry in 1 hour (at 20°C (68°F))
• Ready to overcoat after 16 hours (at 20°C (68°F))

Product Data

Heat-resistant modified alkyd aluminum finish.

Notes:

• Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times

Surface Preparation

Recommended Substrate Conditions and Temperatures

Substrate conditions

• Previous coat must be dry and free from any contamination

Substrate Temperature and Application Conditions

• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point

Application

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 sheet 1433 and information sheet 1434)

Air Spray

Recommended thinner

• Thinner 20-05

Volume of thinner

• 0 - 3%, 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

• No thinner should be added

Nozzle orifice

• Approx. 0.33 – 0.38 mm (0.013 – 0.015 in)

Nozzle pressure

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

Brush/roller

Recommended thinner

• No thinner should be added

Cleaning Solvent

• Thinner 20-05

Spreading Rate and Film Thickness

Overcoating interval for DFT up to 25 µm (1.0 mils)

Curing time for DFT up to 25 µm (1.0 mils)

Safety Precautions

• For paint and recommended thinners, see information sheets information sheet 1430, information sheet 1431 and the relevant Material Safety Data Sheets in the attachments section above
• This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapour, as well as contact between the wet paint and exposed skin or eyes

References

• Conversion Tables (information sheet 1410)
• Explanation to product data sheets (information sheet 1411)
• Safety Indicators (information sheet 1430)
• Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
• Safe Working in Confined Spaces (information sheet 1433)
• Directives for Ventilation Practice (information sheet 1434)
• Cleaning of Steel and Removal of Rust (information sheet 1490)
• Specification for Mineral Abrasives (information sheet 1491)
• Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)