Sold as a Case of 24 Bottles

SONLOK 3577 is a medium-strength, high-performance anaerobic thread sealant engineered for the locking and sealing of metal threaded pipes and fittings. Designed to cure rapidly in the absence of air between close-fitting metal surfaces, this sealant provides immediate low-pressure resistance after assembly and long-term sealing performance once fully cured.

Manufactured by Parson Adhesives, SONLOK 3577 is ideal for sealing against gases, water, LPG, hydrocarbons, oils, and a wide range of chemicals. Its excellent thixotropic properties prevent migration of the sealant before and during curing, ensuring clean application and reliable sealing—especially on coarse threads and stainless steel without the need for surface activation. This product is supplied in 50ml bottles and sold as a case of 24, making it well suited for commercial, industrial, and maintenance operations.

Key Features & Benefits

• Medium-strength anaerobic thread sealant for metal pipes and fittings
• Yellow color for easy visual identification
• Rapid cure with immediate low-pressure resistance
• Excellent sealing against gases, water, oils, fuels, and chemicals
• Thixotropic formulation prevents run-off and migration
• Suitable for coarse threads and stainless steel without activator
• High resistance to vibration and temperature extremes

Typical Applications

• Locking and sealing threaded metal pipes and fittings
• Gas, water, and fluid handling systems
• LPG and hydrocarbon line sealing
• Industrial plumbing and mechanical assemblies
• Stainless steel threaded connections

Adhesive Properties

Composition: Methacrylate Ester
Color: Yellow
Viscosity: 24,000 – 80,000 cps @ 25°C
(Brookfield RVT, Spindle 3 @ 20 rpm)
Specific Gravity: 1.09
Flash Point: >100°C
Solvent Content: None

Curing Properties

Handling Cure Time: 10–30 minutes
Functional Cure Time: 2–4 hours
Full Cure Time: 24 hours

Torque Performance (ISO 10964):
• Breakaway Torque (M10 steel): 11 N·m (100 lb·in)
• Prevail Torque (M10 steel): 6 N·m (50 lb·in)
• Break Loose Torque (Pre-torqued to 5 N·m): 17 N·m (150 lb·in)
• Max Prevail Torque (Pre-torqued to 5 N·m): 17 N·m (150 lb·in)

Compressive Shear Strength (ISO 10123):
• Steel pins & collars: >5 N/mm² (>725 psi)

Service Temperature Range: −65°F to 180°F

Physical Properties

• Coefficient of Thermal Expansion: 80 × 10⁻⁶ (ASTM D696)
• Thermal Conductivity: 0.10 W/(m·K) (ASTM C177)
• Specific Heat: 0.30 kJ/(kg·K)

Chemical Resistance

(% Initial Strength Retained)

Application Instructions

• Ensure surfaces are clean, dry, and free of contaminants
• Apply a 360° bead to the male threads, leaving the first thread free
• Work sealant into threads and voids as needed
• Apply a 360° bead to the female threads
• Assemble and tighten to specification

Packaging & Storage

• Package Size: 50ml bottles
• Selling Unit: Case of 24 bottles
• Store unopened containers in a cool, dry place
• Ideal storage temperature: 46°F to 82°F (8°C to 28°C)
• Do not return unused material to the original container

SONLOK 3577 Anaerobic Thread Sealant delivers reliable sealing, controlled strength, and excellent chemical resistance, making it a trusted solution for metal pipe and fitting assemblies in demanding industrial environments—now conveniently packaged in case quantities of 24.