High-Temperature Flange Sealant | Sold as a Case of 24 Bottles

SONLOK 3510 is a high-performance anaerobic gasket sealant designed for form-in-place gasketing of close-fitting metal flanges. This red, thixotropic sealant develops medium strength in a short time and cures in the absence of air between metal surfaces, creating a durable, leak-resistant seal capable of withstanding high temperatures and aggressive chemicals.
Packaging: 50ml bottles, sold by the case of 24.

Manufactured by Parson Adhesives, SONLOK 3510 is engineered for demanding mechanical environments such as engines and gearboxes. Its non-slump formulation prevents migration after application, ensuring clean assembly and reliable sealing—even on vertical or complex flange geometries.

Key Features & Benefits

• Anaerobic, form-in-place gasket sealant for metal flanges
• High-temperature resistance up to 400°F (204°C)
• Excellent resistance to oils, fuels, water/glycol, and chemicals
• Thixotropic (non-slump) formulation prevents run-off
• Medium strength with dependable sealing performance
• Ideal replacement for traditional cut gaskets

Typical Applications

• Flanged connections and rigid metal joints
• Engine casings and gearbox assemblies
• Industrial machinery housings
• Applications requiring chemical and heat resistance

Comparable To

SONLOK 3510 is commonly used as an alternative to:

• Loctite® 510 Anaerobic Gasket Sealant (by Henkel Loctite)

It offers comparable high-temperature resistance, chemical durability, and form-in-place gasketing performance for metal flange assemblies.

Adhesive Properties

Composition: Dimethacrylate Ester
Color: Red
Viscosity: 188,000–500,000 cps (Thixotropic) @ 25°C
(Brookfield RVT, Spindle 7 @ 20 rpm)
Specific Gravity: 1.10
Maximum Gap Filling: >0.20 mm
Flash Point: >93°C
Solvent Content: None

Curing Properties

Handling Cure Time:
• Unprimed surfaces: 2–8 hours
• Primed surfaces: 30 minutes–4 hours

Compressive Shear Strength (ISO 10123):
• After 24 hrs @ 22°C: >7.5 N/mm² (>1,085 psi)

Lap Shear Strength (ISO 4587):
• Steel (grit blasted): 5 N/mm² (725 psi)

Tensile Strength (ISO 6922):
• Steel (grit blasted): 7.5 N/mm² (1,085 psi)

Service Temperature Range: −65°F to 400°F

Packaging & Storage

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

SONLOK 3510 delivers reliable high-temperature sealing, excellent chemical resistance, and clean form-in-place gasketing, making it a proven alternative to Loctite 510 for professional and industrial flange sealing applications—now available by the case of 24.