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LOCTITE 480 is a black, rubber toughened ethyl cyanoacrylate adhesive formulated for bonding metals, plastics and rubbers.
It is a single component, low viscosity liquid that cures rapidly when exposed to atmospheric moisture.
The adhesive offers improved flexibility, high peel strength and enhanced resistance to shock and impact compared to standard cyanoacrylates.
It has a specific gravity of approximately 1.05 and a viscosity range of 100 to 200 mPa·s at 25°C, ensuring reliable bonding performance in thin bond gaps.
After full cure, it delivers strong mechanical strength along with good thermal and electrical insulation properties.
LOCTITE 480 is a one-part ethyl cyanoacrylate adhesive designed for industrial bonding applications where impact resistance and flexibility are required. The uncured material appears as a black liquid and does not require mixing before use. It is rubber toughened to improve peel strength and resistance to shock loading. Polymerization begins when the adhesive is exposed to atmospheric humidity and confined between mating surfaces. Handling strength develops quickly under normal conditions at 22°C and 50% relative humidity, while full chemical and solvent resistance continues to develop for up to 24 hours.
The product has a specific gravity of approximately 1.05 at 25°C. Viscosity measured at 25°C is typically between 100 and 200 mPa·s by both cone and plate and Brookfield methods. Cure speed varies depending on the substrate, bond gap and ambient humidity. Typical fixture times at 22°C and 50% relative humidity are 60 to 120 seconds for degreased steel, 10 to 30 seconds for aluminum, 50 to 150 seconds for zinc dichromate, less than 20 seconds for neoprene and nitrile rubber, 20 to 50 seconds for ABS, 50 to 100 seconds for PVC, 30 to 90 seconds for polycarbonate and 20 to 60 seconds for phenolic materials. Thinner bond lines accelerate cure speed, while larger gaps reduce curing rate. Activators may be used to speed curing in larger gaps, although ultimate bond strength may be affected and evaluation is recommended.
After curing for 24 hours at 22°C, the adhesive exhibits a coefficient of thermal expansion in accordance with ISO 11359-2, thermal conductivity of approximately 0.1 W/(m·K), and a glass transition temperature of about 150°C. Electrical properties include volume resistivity around 10 × 10¹⁵ ohm·cm, surface resistivity of approximately 10 × 10¹⁵ ohms, dielectric breakdown strength of about 25 kV/mm, and a dielectric constant of approximately 2.65 to 2.75 with a dissipation factor below 0.02 across frequencies of 0.1 kHz to 10 kHz.
Mechanical performance after 24 hours at 22°C shows lap shear strength values of 22 to 30 N/mm² on grit blasted steel, 14 to 22 N/mm² on etched aluminum, 8 to 15 N/mm² on zinc dichromate, 6 to 20 N/mm² on ABS, 4 to 20 N/mm² on PVC, 5 to 15 N/mm² on polycarbonate, 5 to 20 N/mm² on nitrile, and 5 to 15 N/mm² on neoprene and phenolic substrates. Tensile strength on grit blasted steel typically ranges from 12 to 25 N/mm², while tensile strength on Buna-N rubber ranges from 5 to 15 N/mm². After only 30 seconds cure at 22°C, Buna-N tensile strength can reach at least 1.8 N/mm². Following 24 hours cure at 22°C and an additional 48 hours at 120°C, lap shear strength on grit blasted steel can achieve values of at least 18 N/mm².
Environmental resistance testing indicates the adhesive retains strength after exposure to motor oil at 40°C, gasoline, ethanol, isopropanol and Freon TA at room temperature. Heat and humidity exposure at 95% relative humidity and 40°C results in gradual strength reduction over time, while polycarbonate substrates show strong retention under similar conditions. Hot strength testing demonstrates progressive strength reduction as temperature increases toward 150°C.
For optimal bonding performance, surfaces should be clean and free from grease or contamination prior to application. The adhesive performs best in thin bond gaps of approximately 0.05 mm. Excess adhesive can be removed using suitable cleanup solvents such as nitromethane or acetone. The product should be stored in its original unopened container in a dry location at temperatures between 2°C and 8°C. Storage below 2°C or above 8°C may negatively affect product characteristics. This adhesive is not recommended for use in pure oxygen or oxygen-rich systems and should not be used with strong oxidizing agents. The technical values provided represent typical properties and are intended for reference purposes only.
Product Type – Rubber toughened ethyl cyanoacrylate adhesive
Appearance – Black, low viscosity liquid
Viscosity @ 25°C – 100 to 200 mPa·s
Specific Gravity @ 25°C – Approximately 1.05
Fixture Time – 10 to 120 seconds (depending on substrate)
Full Cure Time – 24 hours at room temperature
Operating Temperature Range – -40°C to 120°C (Short term up to 150°C)
