Tectyl 894 Class II

Tectyl 894 Class II is a semi-firm, water-displacing, and lubricating corrosion preventive compound with environmentally compliant VOC levels. It’s QPL approved under Military Specification MIL-PRF-16173E, Grade 3, Class II and complies with MIL-P-116J, Type P-3 requirements. This product represents Daubert Chemical Company’s eco-friendly option within their military-grade corrosion protection solutions.

Key Specifications

• Military Specification: MIL-PRF-16173E, Grade 3, Class II
• Secondary Compliance: MIL-P-116J, Type P-3
• VOC Content: Not exceeding 2.8 lbs/gallon (340 grams/liter) – distinctive of Class II products
• Liquid Appearance: Amber
• Dry Film Color: Amber
• Film Type: Semi-Firm

Physical Properties

• Non-Volatiles by Weight: 66.2% (higher than Class I’s 57.5%)
• Non-Volatiles by Volume: 62.2% (higher than Class I’s 53.4%)
• Specific Gravity: 0.87 (slightly higher than Class I’s 0.85)
• Weight per Gallon: 7.24 lbs (heavier than Class I’s 7.09 lbs)
• Viscosity: 17.8 cSt @ 100°F (lower than Class I’s 41 cSt)
• Flash Point: 105°F (same as Class I)
• Dry Film Thickness: 0.7 mils (thicker than Class I’s 0.4 mils)
• Coverage: 1,329 sq.ft/gallon (greater than Class I’s 1,215 sq.ft/gallon)

Performance Characteristics

• 100% Relative Humidity (ASTM D-1748): 4,800 hours (identical to Class I)
• Salt Spray Testing (ASTM B-117): Not applicable for Grade 3 products
• Indoor Protection Duration: 2 years (same as Class I)
• Outdoor Protection Duration: 2 months (same as Class I)
• Cure Time: 24 hours (same as Class I)

Class I vs Class II Comparison

The key differences between Tectyl 894 Class I and Class II are:

1. VOC Content:
   • Class I: 3.01 lbs/gallon
   • Class II: 2.45 lbs/gallon (more environmentally compliant)
2. Solids Content:
   • Class II has higher non-volatiles by both weight (66.2% vs 57.5%) and volume (62.2% vs 53.4%)
3. Film Properties:
   • Class II creates a thicker dry film (0.7 mils vs 0.4 mils)
   • Class II offers slightly better coverage (1,329 sq.ft/gal vs 1,215 sq.ft/gal)
4. Viscosity:
   • Class II has lower viscosity (17.8 cSt vs 41 cSt @ 100°F), making it potentially easier to apply by spray

Despite these differences, both formulations deliver identical protection durations:

• 2 years indoor
• 2 months outdoor

Application Methods

• Preferred Method: Dipping
• Alternate Methods: Brush or spray application
• Temperature Recommendation: 50-95°F (10-35°C) for both ambient and product
• Specialized Equipment:
  • Pumps with minimum ratio of 15:1
  • Tungsten carbide nozzles (0.011″ to 0.017″)
  • Specific hose configurations depending on pump ratio

Removal

Both Class I and Class II versions can be removed using:

• Mineral spirits
• Citrus-based cleaners

Environmental Considerations

The primary advantage of Tectyl 894 Class II is its reduced environmental impact through lower VOC emissions, making it the preferred choice in regions with strict VOC regulations while still delivering the same level of corrosion protection as its Class I counterpart.

Tectyl 894 Class II represents an environmentally conscious alternative within Daubert’s military-approved corrosion preventive compounds, balancing regulatory compliance with effective protection for critical metal surfaces in both storage and transit applications.