Loctite 401
Loctite 401 is a general-purpose instant adhesive (cyanoacrylate) from Henkel designed for fast bonding of a wide range of materials. It cures rapidly on contact and forms strong bonds with minimal gap fill.
Key Features
Fast curing – rapid bond formation, often within seconds.
Versatile substrate adhesion – bonds a wide variety of materials.
Low viscosity – good for close-fitting parts and tight joints.
Primerless on many substrates – no surface primer required for most materials.
Low odor – more user-friendly than many industrial adhesives.
Applications
Loctite 401 is widely used where fast adhesion of small components is needed:
Common Uses
- General assembly work (plastic, metal, rubber parts)
- Electronic component bonding
- Fixtures and fittings in consumer products
- Crafts, models, and repairs
Suitable Materials
- Metals: steel, aluminum, brass
- Plastics: ABS, acrylic, nylon (some plastics may need surface treatment)
- Elastomers: rubber, silicone-tolerant grades
- Porous materials: wood, paper, leather
Product Data
| Property | Typical Value |
| Appearance | Transparent liquid |
| Chemical Base | Ethyl cyanoacrylate |
| Viscosity (Brookfield) | ~20–50 mPas (cP) |
| Cure Mechanism | Anaerobic / moisture-activated |
| Fixture Time | < 10 seconds (thin bond line) |
| Full Cure | Minutes to hours (depending on substrate & environment) |
| Temperature Range | ~-55 °C to +80 °C (typical) |
| Strength | High tensile strength on many substrates |
Safety & Handling
Below is a general summary based on typical cyanoacrylate adhesive SDS guidance. Always use the official SDS for your specific product code.
Health Hazards
- Eye and skin irritation: Strong adhesives can bond to skin and eyes quickly.
- Respiratory irritation: Vapors may irritate if inhaled in poor ventilation.
PPE & Safe Handling
- Wear gloves to prevent skin bonding.
- Eye protection (goggles/face shield).
- Work in well-ventilated areas.
Avoid prolonged skin contact.
First Aid
- Skin contact: Soak bonded area with warm, soapy water; do not pull apart forcibly.
- Eye contact: Rinse with water immediately and seek medical help.
- Inhalation/ingestion: Seek medical help if symptoms occur.
Storage
- Keep in a cool, dry place away from moisture.
- Tightly close cap after use to prolong shelf life.
