Hercules 15-808 Megaloc Thread Sealant – 1 Pint

The Hercules 15-808 Megaloc Thread Sealant is a high-performance, multi-purpose compound formulated for sealing threaded connections in metallic and plastic piping systems. Reinforced with DuPont™ Kevlar® fibers, the compound provides superior tensile strength, hydraulic integrity, and long-term flexibility under temperature and pressure variations. Megaloc forms a non-hardening, non-separating, and leak-resistant joint suitable for a wide range of industrial, mechanical, and plumbing applications involving both gas and liquid service.

Details

• Manufacturer: Hercules (Oatey Company)
• Model Number: 15-808
• Product Name: Megaloc Thread Sealant
• Product Type: High-performance pipe joint compound
• Container Type: Metal can with brush-in-cap applicator
• Container Size: 1 pint (473 mL)
• Physical Form: Liquid paste
• Color: Blue
• Odor: Odorless
• Net Weight: Approx. 1.0 lb
• Composition:
  • Petroleum-Based Lubricating Oil
  • Kaolin
  • Talc
  • Magnesium Carbonate
  • Poly(p-phenylenediamine terephthalamide) (Kevlar® Fiber)
  • Titanium Dioxide
  • Amorphous Fumed Silica
• Service Temperature Range: -50°F to 400°F (-46°C to 204°C)
• Application Temperature Minimum: -25°F (-32°C)
• Flash Point: 212°F (100°C)
• Viscosity: 30,000 cP
• VOC Content: 4 g/L
• Flammability Rating: 1 (low)
• Pressure Ratings:
  • Hydraulic: up to 12,000 PSI
  • Gas: up to 2,600 PSI
• Applicable Materials: Aluminum, Black Iron, Brass, Copper, Galvanized Steel, Stainless Steel, Monel, Glass, Fiberglass, PVC, CPVC, ABS, Polyethylene, and Nylon Plastic
• Curing Characteristics: Non-hardening, remains flexible and stable under pressure
• Corrosion Resistance: Provides thread protection and prevents oxidation
• Toxicity: Non-toxic, non-hazardous
• Environmental Compliance: Non-flammable, non-volatile, lead-free, heavy-metal-free

Technical Application

Hercules Megaloc is designed for sealing threaded connections in piping systems carrying water, air, steam, natural gas, LPG, and other compatible industrial fluids. The inclusion of Kevlar® fibers reinforces the sealant, providing mechanical strength within the thread structure and preventing extrusion under pressure. It can be used on both metallic and plastic fittings, ensuring consistent sealing performance without thread distortion. The compound’s non-hardening properties allow for disassembly and reassembly without galling or damage to threads, even after extended service. Megaloc applies cleanly with a natural bristle brush and can be tested immediately after application without cure delay. It remains stable under temperature cycling and high-pressure conditions, maintaining seal integrity in dynamic service environments.

Specifications

• Type: Non-hardening, reinforced thread sealant
• Base Material: Petroleum oil and mineral filler blend with Kevlar® fibers
• Color: Blue
• Viscosity: 30,000 cP
• Flash Point: 212°F
• VOC Level: 4 g/L
• Service Temperature: -50°F to 400°F
• Pressure Ratings: 12,000 PSI (liquid), 2,600 PSI (gas)
• Formulation Additives: DuPont™ Kevlar® fiber reinforcement
• Application Range: Metallic and plastic threaded fittings
• Application Temperature: As low as -25°F
• Cleanup: Wipes clean with a dry rag; no solvent required
• Compliance: Non-flammable, non-toxic, lead-free, heavy metal-free, and non-hazardous

Summary

The Hercules 15-808 Megaloc Thread Sealant delivers high-performance sealing for professional-grade piping systems across plumbing, industrial, and mechanical installations. Reinforced with Kevlar® for tensile stability, it provides immediate leak-proof sealing across a wide pressure and temperature range without hardening or separation. Suitable for use on both metal and plastic connections, Megaloc maintains flexibility, resists corrosion, and allows for service disassembly without thread damage, ensuring long-term reliability in demanding environments.