RECOMMENDED SUBSTRATE CONDITIONS AND TEMPERATURES

Substrate conditions

• Steel; blast cleaned to ISO Sa 21⁄2 or SSPC-SP-10, blasting profile 25 – 50 μm (1.0 – 2.0 mils)
• Suitable coating (zinc silicate primer) must be dry, free from any contamination and zinc salts
• Stainless steel; degreased and sweep blast (SSPC SP-16) cleaned to roughness of 40 – 70 μm (1.5 – 2.8 mils) with non-

ferrous abrasive
Note: The maximum continuous dry heat temperature when power tool treated surface (ISO-St3) is 400°C

Substrate temperature and application conditions

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

SYSTEM SPECIFICATION

• Suitable Primers : PPG Ethyl Silicate Zinc Primers
• Do not use HI-TEMP 1027 or 222G as primer
• Direct to stainless steel with suitable surface treatment
• INSTRUCTIONS FOR USE
• Power agitate to uniform consistency
• Application with airless equipment is possible, but be careful not to apply more than specified thickness
• When applying more than one coat, it is recommended that the total dry film thickness of SIGMATHERM 540 does not

exceed 80 μm (3.1 mils)

Air spray

Recommended thinner

No thinner should be added

Nozzle orifice

1.5 – 2.0 mm (approx. 0.060 – 0.079 in)

Nozzle pressure

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

Brush/roller

• For Roller application the best results will be obtained by using fine foam type rollers

Cleaning solvent

THINNER 21-06