LOCTITE® 515

Features and Benefits

This anaerobic-curing flange sealant for rigid machined metal flanges fills gaps up to 0.25mm (0.01") and typically provides a 30-minute fixture time.
LOCTITE® 515 is a form-in-place anaerobic-curing flange sealant that cures when confined in the absence of air between close fitting metal surfaces. It seals close fitting joints between rigid metal faces and flanges and will flex with minor flange movements. It provides resistance to low pressures immediately after assembly of flanges, and is typically used as a form-in-place gasket for pumps, thermostats, compressors, transmission housing,s and axle covers. The product is fluorescent under UV light, allowing visual inspection of the bead.
  • For machined metal components
  • Forms a perfect seal
  • Larger gap fill up to 0.01" (0.25mm)
  • Form-in-place sealant
  • Fluorescent under UV for quality control
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Technical Information

Application method Dispense System, Manual
Applications Rigid Assembly Gasketing, Sealing
Chemical basis / base Methacrylate
Color Purple
Cure type Anaerobic Cure
Fixture time 30.0 min.
Gap fill 0.25 mm
Key characteristics Fluorescent, For machined, rigid flanges, Strength: Medium Strength, Thixotropic
Lab shear strength 6.0 N/mm²
Number of components 1 Part
Physical form Gel
Recommended for use with Metal: Aluminum, Metal: Steel
Storage temperature 8.0 - 21.0 °C
Viscosity, Brookfield - HBT, @ 25.0 °C Spindle TB, speed 0.5 rpm, Helipath 700000.0 - 1700000.0 mPa·s (cP)
Viscosity, Brookfield - HBT, @ 25.0 °C Spindle TB, speed 5.0 rpm, Helipath 150000.0 - 375000.0 mPa·s (cP)