THE SCIENCE THAT STOPS CORROSION®

Self-Leveling® Gray (HT7725-8) and Self-Leveling® Gray FR (HT7725-8FR)

  • Two-component polyurethane sealant designed to form a watertight and flexible environmental barrier
  • High viscosity formulation enables controlled self-leveling with minimal drip or runoff
  • Fast-curing sealant with excellent cohesion that allows for clean removal when required
  • Available in a flame-retardant (FR) formulation for applications requiring enhanced fire protection
  • Non-hazardous, zero VOC formulation suitable for aviation and industrial environments
COMMON USES: • Seat tracks • floor panel seams • gap filling • and locations where traditional damming methods are not feasible

Product Specifications

Injectables
Self Leveling® Gray
Self Leveling® Gray FR
Part Number - 50cc
HT7725-8-50
HT7725-8FR-50
Part Number - 200cc
HT7725-8-200
HT7725-8FR-200
Color, properly mixed
Gray
Gray
Reaction Ratio - by volume
100 : 100
100 : 100
Shelf Life - in original packaging and stored above at 55°F/13°C
Six months
Six months
Storage Temperature
> 55°F/13°C
> 55°F/13°C
Service Temperature Guide (RTCA DO-160G, Section 5, 2 cycles)
-85°F to 275°F/-65°C to 135°C
-85°F to 275°F/-65°C to 135°C
Application Temperature
> 55°F/13°C
> 55°F/13°C
Fire Retardant per 14 CFR, PART 25-Subpart D, § 25.853 Compartment interiors & § 25.855 Cargo or baggage compartments Appendix F, Part I, (a)(1)(ii) (12 sec vertical test)
Passed
Cure Characteristics — All testing completed at 77°F (25°C) * : Working Life (ADTM 6016)
< 6 minutes
< 2 minutes
Cure Characteristics — All testing completed at 77°F (25°C) * : Tack-Free Time (AS5127/1 Section 5.8)
≈ 100 Minutes
≈ 60 minutes
Cure Characteristics — All testing completed at 77°F (25°C) * : Hardness at 24 hrs (ASTM D2240)
> 35; Shore "OO"
> 70; Shore "OO"

A Self-Leveling Gray Sealant for Gap Filling and Moisture Protection

Self-Leveling Gray HT7725-8 is a two-component polyurethane sealant engineered to provide a reliable, watertight, and flexible barrier in applications where controlled self-leveling is required. Its optimized high viscosity allows the sealant to flow into gaps and cavities while minimizing drip, making it ideal for confined or hard-to-dam areas.

For applications requiring additional fire protection, Self-Leveling Gray HT7725-8 is also available in a flame-retardant (FR) formulation HT7225-8FR. This option maintains the same self-leveling performance and cohesive strength while meeting more stringent flammability requirements commonly found in aviation interiors and other regulated environments.

Designed for fast cure and ease of application, HT7725-8 demonstrates strong cohesive properties and forms a durable moisture barrier that helps reduce corrosion in assemblies exposed to water, humidity, vibration, and operational wear. When inspection or maintenance is required, the sealant can be removed cleanly with little to no residue, helping reduce labor time.

  • Forms a watertight environmental seal that protects assemblies from moisture and debris
  • High viscosity, self-leveling behavior enables effective gap filling with minimal runoff
  • Flame-retardant option available for applications with elevated fire safety requirements
  • Fast cure characteristics support reduced downtime during maintenance operations
  • Flexible polyurethane seal maintains performance under vibration and temperature variation

Self-Leveling Gray HT7725-8 is commonly used for filling seat tracks and sealing between floor panels, particularly in applications where traditional damming methods are impractical. The sealant is supplied in a standard 50cc cartridge and is compatible with standard dispensing equipment.

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