PU Primer #153 White + Catalyst #4
PU PRIMER #157 WHITE is a polyurethane pigmented undercoat based on flexible saturated polyesters and selected pigments. A two-component material with outstanding characteristics and elasticity.
Major Uses : PU PRIMER #157 WHITE is primarily used for car refinishing and PVC basecoats. Film obtained is hard and flexible, even in high thickness of application (100 – 200 microns) and their characteristics remain unchanged even after ageing. It is also excellent for outdoor steel furniture, steel trenches, railings and steel gates.
CHARACTERISTICS & PHYSICAL PROPERTIES :
Appearance – Liquid White
Specific Weight – 1.50 kg/L
Viscosity – 150 – 180” FC # 4
Flash Point – 21ºC
Non-Volatile (Wt.%) – Base: 66, Catalyst: 30
Application condition – Air temperature 5 – 35ºC Relative Humidity 85% max.
Application Method – Brush, Spray or Roller
Recommended Catalyst – Catalyst #042
Thinner – PU Thinner #105/205
Mixing Ratio (%V) – Base 100, Cat. 50, Thinner 25-30
Pot Life – 3 – 4 hours
Drying time (20ºC) – Dust-free 20 – 30 min., Touch-free 35 – 45 min.,
Recoat 2 – 3 hrs., Hard 24 – 36 hrs.
Coverage – 5 – 7 m2/L
Recoating – Minimum of 30 min. – max. 3 hrs. sanding with sandpaper grit 180-240 is recommended before subsequent coat.
SURFACE PREPARATION :
The surface should be cleaned, free from oil, grease and other contaminants. It should be grit blasted to Sa 2 ½. If sandblasting is not possible, wire brushing or cold phosphate is recommended. The temperature of the substrate should be min. 100C and 30C min. above the dew point of the air. All damage of shop primer and contaminants from storage and fabrication should be thoroughly cleaned prior to final painting.
OTHER METALS, GALVANIZED STEEL AND ALLOYS:
Thorough degreasing and light are abrasive to remove all contamination and to provide proper adhesion.
The surface to be primed must be cleaned thoroughly with a suitable solvent to ensure that no traces of compound that will interfere in the adhesion of the primer. If possible. Light sanding is required to attain a better anchorage.
Remove all traces of oil, grease and other contaminants. Remove salt and other foreign matters by high-pressure freshwater, remove all loose debris and laitance by abrasive of by power tool blasting. Touch up full film thickness.