PPG - Amercoat 71 TC is a Two-component, polyamide-cured epoxy tiecoat that is suitable for use with a wide range of topcoats for immersion and non-immersion services.

Best Uses:

• Forms durable coating systems with a wide range of topcoats for immersion and non-immersion services
• Excellent adhesion to steel, shop primer, galvanized steel and non-ferrous metals
• Suitable as tiecoat over DIMETCOTE

Substrate conditions

• Steel; blast cleaned to ISO Sa 2½ or SSPC-SP-10, blasting profile 25 – 50 µm (1.0 – 2.0 mils)
• Previous suitable coat must be dry and free from any contamination
• Refer to application instructions for the particular DIMETCOTE for any other special topcoating requirements Note: Apply primer as soon as possible after surface preparation to prevent any contamination.

Galvanized steel and aluminum

• Galvanized steel must be free from grease, salts and any contamination
• If galvanizing has been exposed to exterior weathering for 6 months or more, remove zinc corrosion products by mechanical means (like power sander or a light blast).
• Aluminum must be dry and free from any contamination
• A light blast with fine abrasive is required

Note: Apply primer as soon as possible after surface preparation to prevent any contamination.

Substrate temperature and 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)
• Relative humidity during application should not exceed 85%

INSTRUCTIONS FOR USE

Mixing ratio by volume: base to hardener 80:20 (4:1)

• The temperature of the mixed base and hardener should preferably be above 15°C (59°F), otherwise extra thinner may be required to obtain application viscosity
• Add hardener to base and continue stirring until homogeneous
• The thinner should be added after mixing the two components
• Adding too much thinner results in reduced sag resistance

Air spray

Recommended thinner

THINNER 91-83

Volume of thinner

0 - 10%, depending on required thickness and application conditions

Nozzle orifice

1.8 – 2.2 mm (approx. 0.070 – 0.087 in)

Nozzle pressure

0.40 - 0.60 MPa (approx. 4 - 6 bar; 58 - 87 p.s.i.)

Airless spray

Recommended thinner

THINNER 91-83

Volume of thinner

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

Nozzle orifice

Approx. 0.38 – 0.53 mm (0.015 – 0.021 in)

Nozzle pressure

20.7 MPa (approx. 207 bar; 3003 p.s.i.)

Brush/roller

Recommended thinner

THINNER 91-83

Volume of thinner

0 – 10%

Note: Typically 40-50 microns (1.6-2.0 mils) dry film thickness can be applied in one coat

Cleaning solvent

THINNER 90-53

Note: All application equipment must be cleaned immediately after use