Knowde Enhanced TDS
Identification & Functionality
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Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
Applications & Uses
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- Recommended Use
Heavy Duty Inhibitive Primers are intended for use where exterior exposure, prior to erection and enclosure, may exceed three months, or where the exposure life may be unpredictable. They are recommended for use in humid environments such as coastal areas. For long-term exterior exposure, topcoat with a quality alkyd enamel.
- Applications
- Reducer: 560X3502 (VM&P Naphtha) or560X0194 (Mineral Spirits) ifslower flash-off time is desired.
- Clean Up: 560X3502 (VM&P Naphtha) or 560X0194 (Mineral Spirits)
- Surface Preparation: Surface of substrate should be dry, clean, and in sound, paint worthy condition. The surface must be free of dirt, grease, oil, salts, loose rust, loose mill scale, and any other foreign materials or contaminants.
- Steel and Iron: The minimum surface preparation for steel and iron is Hand Tool Cleaning per SSPC-SP2. Prior to this procedure, the surface should be solvent cleaned per SSPC-SP1. For better performance, begin with SSPC-SP1 followed by SSPCSP6, Commercial Blast Cleaning. Bare metal should be primed as soon after surface preparation as possible, or before flash rusting occurs.
- Application Conditions
- Surface Temperature: 50°F - 110°F (Surface should be dry and a minimum of 5°F (3°C) above the dew point.)
- Paint Temperature: 50°F - 90°F
- Relative Humidity: Dry times are adversely affected as the relative humidity increases. Caution is encouraged when painting in very humid conditions.
- Mixing & Thinning Instructions
- Before use, mix paint thoroughly by boxing and stirring. Mechanical agitation is preferred. Be sure all settlement, if any, is well incorporated. Thinning of this product is not normally required; however, if it is deemed necessary, use 560X3502 (VM&P Naphtha). If dry spray becomes an issue during very hot weather, use 560X0194 (Mineral Spirits) to retard flash-off time.
- Note: The addition of thinner reduces viscosity, which, in turn, affects spread rate and application characteristics. If thinner is used, make sure it is well incorporated into the paint prior to application.
- Application Equipment
The following are general recommendations. Pressure and tip size may be varied due to temperature changes and for proper spray characteristics.
Thinner: Typically, not recommended. If deemed necessary, use 560X3502 (VM&P Naphtha).
See Mixing and Thinning Instructions for further information.
Airless Spray:- Pump Ratio: 30:1
- Hose: 1/4” or 3/8”
- Tip Size: .015 -.019
- Pressure: 1800 -3000 psi
- Filter: 60 Mesh
Air-assisted Airless
- Pump Ratio: 15:1 -30:1
- Fluid Pressure: 800 -1200 psi
- Air Pressure: 5 -20 psi
- Fluid Hose: 1/4” -3/8”
- Tip Size: .015 - .019
Conventional Spray:
- Gun: Graco AirPro or equal
- Fluid Nozzle: 1.4 mm
- Air Cap: 289773
- Atomization Pressure: 40 - 50 psi
- Fluid Pressure: 15 -20 psi
Brush: Natural Bristle – for small areas only.
- Hints for Better Performance
- A clean substrate is necessary for optimal performance of the primer, as direct contact of primer and steel surface is required for rust inhibition and good adhesion.
- All welds, sharp edges, angles, and other areas prone to early rusting due to insufficient coverage should be stripe-coated prior to full application in order to help prevent premature failure in these areas.
- Over-thinning of the coating material can result in an insufficient film-build, poor adhesion and overall poor appearance.
- During the spray application, use a 50% overlap with each pass of the gun. This will help ensure complete and thorough coverage, avoiding low build areas, which may corrode prematurely due to insufficient primer.
Properties
- Gloss (0-5 units at max. 60°)
- Flat
- Typical Properties
- Performance Properties
System Tested:
- Substrate: Steel
- Surface Preparation: SSPC-SP6
- 1 ct. Inhibitive Primer @ 2 mils dft
Adhesion:
- Method: ASTM D4541 Type II
- Result: 7-day cure: Passes 250 lbs/sq in
Pencil Hardness:
- Method: ASTM D3363
- Result: 7-day cure: HB-F
Direct Impact Resistance:
- Method: ASTM G14
- Result: 24-hour cure: Passes 90 lbs/sq in
- 7-day cure: Passes 90 lbs/sq in
Flexibility:
- Method: ASTM D522
- Result: 24-hour cure: Passes 1/8” bend
- 7-day cure: Passes 1/8” bend
Humidity Resistance:
- Method: ASTM D4585
- Result: Passes 120 hours @ 100°F
- Moderate lightening with no blistering.
Dry Heat Resistance:
- Method: ASTM D2485 Method A
- Result: Passes 200°F
Salt Spray Resistance:
- Method: ASTM B117
- Result: Passes 500 hours
Thermal Shock:
- Method: ASTM D2246 – 5 cycles
- Result: Passes
- Dry Time
At 4.5 Mils Wet, At 77°F (25°C) & 50% Relative Humidity
- To Touch: 30 minutes
- Tack Free: 2 hours
- To Handle: 3 hours
- To Topcoat: Overnight or 8 hours
Drying times are dependent upon film thickness, temperature and humidity.
| Value | Units | Test Method / Conditions | |
| Flash Point (Setaflash) | 105.0 | °F | - |
| HAPS / Gal Solids | 0.023 | - | - |
| Recommended Film Thickness (Dry) | 2 - 4 | mils | - |
| Recommended Film Thickness (Wet) | 3.6 - 7.3 | mils | - |
| Solids by Volume | 53.11 ± 2 | % | - |
| Solids by Weight | 74.85 ± 2 | % | - |
| Spread Rate (Recommended DFT-No Loss) | 440 - 220 | sq ft/gal | - |
| Viscosity (25°C) | 85 - 95 | KU | - |
| VOC Content (366 g/l) | 3.05 | lbs/gal | - |
| Weight Per Gallon | 12.13 | lbs | - |
Regulatory & Compliance
- Regulatory
99-Series Heavy Duty Inhibitive Primers meet or exceed the performance requirements of SSPC Paint No. 25, TT-P-636, MPI #76 and MPI # 79.
Technical Details & Test Data
- Test Results
Fireproofing:
99-Series Heavy Duty Inhibitive Primers have been tested for compatibility and adhesion with certain cementitious fireproofing materials and were found to exhibit excellent performance. They have also been tested and approved under a limited number of intumescent fireproofings with satisfactory adhesion and compatibility.
Weldability:
Independent lab tests have found no evidence 99-Series Heavy Duty Inhibitive Primers adversely affected the welding process. These primers may be welded through to yield sound welds.
Storage & Handling
- Shelf Life
Two years unopened from date of manufacture.