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Lakeshore LX-5 Structural Epoxy

Two-part toughened epoxy adhesive · high-shear · −55 to +180 °C

Part numbers
LX-5-50, LX-5-400, LX-5-BULK
Category
Structural adhesive
Model
LX-5

LX-5 is a two-part, toughened epoxy for structural bonding of metals, composites and ceramics. It cures at room temperature to a high-shear, impact-resistant bond line and holds its strength from −55 to +180 °C, suiting it to aerospace, automotive and general industrial assembly.

Performance data
Lap-shear strength (steel)31 MPa
T-peel strength8 N/mm
Tensile modulus2.9 GPa
Elongation at break4.5%
Glass transition (Tg)82 °C
Service temperature−55 to +180 °C
Mix ratio (A:B)2:1 by volume
Pot life (100 g, 23 °C)45 min
Bond strength by substrate & method
PropertyValueUnitMethod
Lap-shear (aluminium)26MPaASTM D1002
Lap-shear (steel)31MPaASTM D1002
Lap-shear (CFRP)22MPaASTM D1002
T-peel8N/mmASTM D1876
Impact (block shear)18MPaASTM D950
Strength development vs cure temperature
Cure profile
1010023120Full-strength (%)Cure temperature (°C)
Chemical & environmental resistance
ExposureResistanceNotes
Water / humidityExcellentNo loss after 1000 h at 40 °C / 95% RH
Mineral oils & fuelsExcellentFull retention after 30-day immersion
Dilute acids / alkalisGoodMinor softening above pH 12
Ketones & chlorinated solventsLimitedNot recommended for continuous exposure
UV / weatheringGoodSlight chalking; overcoat for appearance
Application notes

Abrade and solvent-degrease both faying surfaces. Dispense through a static mixer, apply within the 45-minute pot life and clamp to a 0.10–0.20 mm bond line. Handling strength is reached in 10 hours at 23 °C; a 60-minute post-cure at 80 °C develops full strength and raises the glass transition.

Standards & references
Lap-shear method
ASTM D1002
T-peel method
ASTM D1876
Block-shear method
ASTM D950
Safety data sheet
SDS-LX5-EN
Product specifications and information are subject to change without notice, and State & Lake assumes no liability for errors, omissions, or the suitability of products for any specific application.
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