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• Recommended substrate conditions & temperatures
• System specification
• Instructions for use
• Safety precautions

Recommended Substrate Conditions & Temperatures

Substrate conditions of carbon steel for insulated and non-insulated service:

• Must be free of oil, dirt, grease and all other contaminants, especially salts
• Round off all rough welds and sharp edges
• Remove weld spatter
• Recommended is dry abrasive blast cleaning to SSPC-SP 6, Commercial Blast (ISO-Sa 2) with a 25 to 50 µm (1.0 to 2.0 mils) profile

Substrate conditions of stainless steel for insulated and non-insulated service:

• Must be free of oil, dirt, grease and all other contaminants, especially salts
• Round off all rough welds and sharp edges. Remove weld spatter
• Small surfaces may be cleaned with a chlorinated-free solvent
• Large surfaces may be cleaned utilizing a high or low pressure wash or steam cleaning with an alkaline detergent (such as Prep 88), followed by a freshwater rinse
• Water used should be potable grade or better and should be checked to assure minimal salt content
• Do not use any chemical additives in the rinse water
• Note: Do not use chlorinated solvents on stainless steel surfaces

Substrate temperature and application conditions:

• Substrate temperature during application should be between 10°C and 66°C
• Substrate temperature during application should be at least 3°C above dew point
• Relative humidity during curing should be above 20% and below 90%

System Specification

Non-insulated service: carbon and stainless steel:

• PPG HI-TEMP 1027 HD: minimum 200-250 µm (8-10 mils) DFT continuous application using multiple spray passes
• Refer to application guide for additional details
• Designed for single coat application, specified thickness can also be built up in 2 coats
• Compatible PPG HI-TEMP topcoats to their respective maximum service temperatures: PPG HI-TEMP 500 or PPG HITEMP 1000

Insulated service: carbon steel:

• PPG HI-TEMP 1027 HD: minimum 250-300 µm (10-12 mils) DFT continuous application using multiple spray passes
• Refer to application guide for additional details
• Designed for single coat application, specified thickness can also be built up in 2 coats

Insulated service: stainless steel:

• PPG HI-TEMP 1027 HD: minimum 250-300 µm (10-12 mils) DFT continuous application using multiple spray passes
• Refer to application guide for additional details
• Designed for single coat application, specified thickness can also be built up in 2 coats

Instructions For Use

For comprehensive application instructions please see the Application Guide in the 'Data Sheets' section above.

Mixing ratio by volume: base to hardener 2:1:

• Pre-mix each component with a pneumatic air mixer at moderate speeds to homogenize the container
• Add hardener to base and agitate with a power mixer for 1–2 minutes until completely dispersed

Air spray:

• No thinner is recommended

Nozzle orifice:

• 1.8 – 2.2 mm

Nozzle pressure:

• 13.8 MPa (approx. 138 bar; 2002 p.s.i.)

Brush/roller:

• Spray application is recommended but when spray painting is not possible, brush or roller may be used
• The coating should be applied with a suitable brush or short nap roller, brush and roll only in one direction

Recommended thinner - application to ambient substrate below 66°C:

• Thinner 21-06 (AMERCOAT 65)

Volume of thinner:

• Up to 5% thinner can be added if desired

Cleaning solvent:

• Thinner 21-06 (AMERCOAT 65)

Spreading rate and film thickness:

• DFT 250 µm (10.0 mils): 2.6 m²/L
• DFT 300 µm (12.0 mils): 2.2 m²/L

Curing time for DFT up to 250 µm (10.0 mils):

• Dry to recoat/topcoat: 6 - 8 hours @ 20°C
• Dry to handle/ship: 18 hours @ 20°C
• Minimum re-coating/top-coat time mentioned refers to compatible topcoats
• PPG HI-TEMP 1027 HD can be re-coated with itself without considering a minimum over coating time
• Drying times are dependent on air and steel temperature, applied film thickness, ventilation and other environmental conditions
• Relative humidity of < 50 % will reduce curing speed and increase time to full cure
• For insulation, the drying times have to be doubled from dry to handle time to ensure sufficient solvent evaporation

Pot life (at application viscosity):

• 6 - 8 hours @ 20°C

Safety Precautions

• The product is for use only by professional applicators in accordance with information in this product data sheet and the applicable safety data sheet (see 'Data Sheets' section above)
• All use and application of this product should be performed in compliance with all relative federal, state and local, health, safety and environmental regulations or in compliance with all pertinent local, regional and national regulations as well as good safety practices for painting, and in conformance with recommendations in SSPC PA 1, 'Shop, Field and Maintenance Painting of Steel'