PPG SigmaRite 37 G-1, a green temperature indication paint that indicates potential dangerous hot spots. SigmaRite 37 G-1 maintains its deep green colour up to 260°C (500°F), fades after 3 weeks at 280°C (536°F), shows perceptible colour change after 18 hours at 315°C (599°F), and changes to white in 3 hours at 400°C (752°F).

Features & Benefits

• Indicates potential dangerous hot spots
• Good weathering resistance
• Maintains its deep green colour up to 260°C (500°F)
• Fades after 3 weeks at 280°C (536°F)
• Shows perceptible colour change after 18 hours at 315°C (599°F)
• Changes to white in 3 hours at 400°C (752°F)
• Colour change is irreversible

Product Data

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

• Steel; blast cleaned to a minimum of ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Suitable primer (DIMETCOTE 11) must be dry and free from any contamination

Substrate Temperature & Application Conditions

• Surface temperature during application should be between 5°C (41°F) and 60°C (140°F)
• Surface temperature during application should be at least 3°C (5°F) above dew point
• Ambient temperature during application and curing should be between 5°C (41°F) and 50°C (122°F)

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

Air spray

Recommended thinner

• THINNER 21-06

Volume of thinner

• 0 - 5%, 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

• THINNER 21-06

Volume of thinner

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

Nozzle orifice

• Approx. 0.33 – 0.48 mm (0.013 – 0.019 in)

Nozzle pressure

• 15.0 - 18.0 MPa (approx. 150 - 180 bar; 2176 - 2611 p.s.i.)

Brush/roller

Recommended thinner

• THINNER 21-06

Volume of thinner

• 0 – 2%

Cleaning Solvent

• 21-06

Spreading Rate and Film Thickness

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

Notes:

• Adequate ventilation must be maintained during application and curing
• Drying and curing times are dependent on air and steel temperature, applied film thickness, ventilation and other environmental conditions

Safety Precautions

• This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapor, as well as contact between the wet paint and exposed skin or eyes
• Since improper use and handling can be hazardous to health and cause of fire or explosion, safety precautions included with Product Data/Application Instruction and Material Safety Data Sheet must be observed during all storage, handling, use and drying periods

References

• 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)