▣ PRODUCT

​

• Part of the Interzinc 22 Series of products.

​

​

▣ PRODUCT DESCRIPTION

​

• A two component, rapid recoat, fast curing solvent based inorganic zinc rich ethyl silicate primer, containing 85% zinc by weight in the dry film. Conforms to SSPC Paint 20 Level 1. Available in ASTM D520, Type II (low lead) zinc dust version as standard

​

​

▣ INTENDED USES

​

• A zinc rich primer suitable for use with a wide range of high performance systems and topcoats in both maintenance and new construction of bridges, tanks, pipework, offshore structures and structural steel work. Interzinc 22 can also be used as tank coating suitable for the carriage of different chemical cargoes (e.g. styrene) according to International Paint’s chemical resistance guide. 

  

• Provides excellent corrosion protection for correctly prepared steel substrates, up to temperatures of 1004°F (540°C) when suitably topcoated.

  

• Fast curing primer capable of application in a wide range of climatic conditions.

​

 

▣ PRACTICAL INFORMATION FOR INTERZINC 22

​

• ​Color : Green Gray

• Volume Solids : 63%

• Typical Thickness : 2-3 mils (50-75 microns) dry equivalent to 3.2-4.8 mils (79-119 microns) wet

• Method of Application : Airless Spray, Air Spray

​

​

▣ Drying Time

​

• Base Temperature : 77°F (25°C)

• Touch Dry : 10 minutes

• Hard Dry : 1 hour

• Overcoating Interval with recommended topcoats

       - ​Minimum : 4.5 hours

       - Maximum : Extended

​

​

▣ APPLICATION

​

• Mix Ratio : 3.1 part(s) : 1 part(s) by volume

​

• Airless Spray - Recommended

       : Tip Range 15-21 thou (0.38-0.53 mm)

       : Total output fluid pressure at spray tip not less than

         1593 psi (112 kg/cm²)

 

• Air Spray (Pressure Pot) - Recommended

       : Typical Pump - Graco X-Treme 40:1 or similar

       : Gun – Devilbiss MBC-510 / JGA-510(Binks 2100)

       : Air Cap - 704 or 765(Binks 66SD or B68PB)

       : Fluid Tip : E(1.88mm or D(2.2mm)) or Binks 66,67

 

• Brush : Suitable - Small areas only

 

• Roller : Not recommended

 

• Thinner : International GTA803

                    (International GTA415 or GTA138)

​

​

▣ SYSTEMS COMPATIBILITY

​

• When it is necessary for Interzinc 22 is to be overcoated by itself due to low dry film thickness the coating surface must be fresh and unweathered. A minimum of 2 mils (50 microns) d.f.t. of any subsequent coat of Interzinc 22 is needed to ensure good film formation.

• Before overcoating with recommended topcoats ensure the Interzinc 22 is fully cured (see above) and if weathering has occurred all zinc salts should be removed from the surface by fresh water washing, and if necessary scrubbing with bristle brushes.

​​

• Typical topcoats and intermediates are:

       Intercure 200         Intergard 475HS

       Intercure 420         Intertherm 50

       Intergard 25           Interseal 670HS

       Intergard 269         Intertherm 715

       Intergard 345

​

• In some cases it may be necessary to apply a mist coat of suitable viscosity to minimize bubbling. This will depend upon the age of the Interzinc 22, surface roughness and ambient conditions during curing and application. 

• Alternatively, an epoxy sealer coat, such as Intergard 269, can be used to reduce bubbling problems.

• For other suitable topcoats/intermediates, consult International Protective Coatings.

​

​

▣ STORAGE

​

• Part A 6 months minimum at 77°F (25°C).

• Part B 12 months minimum at 77°F (25°C).

• Subject to re-inspection thereafter. Store in dry, shaded conditions away from sources of heat and ignition.

​