Loctite Prism 406 Clear Ultra-Low_Viscosity (20cP) Instant CA Adhesive-General Purpose (40640)

Product Name

Loctite Prism 406 Clear Ultra-Low_Viscosity (20cP) Instant CA Adhesive-General Purpose (40640)

Brief Description

Loctite Prism 406 is a clear, ultra-low viscosity (20 cP) instant cyanoacrylate (CA) adhesive designed for very fast fixturing and bonding of plastics and elastomeric materials. It functions as a wicking-grade adhesive, allowing it to penetrate tight spaces and small gaps to create a high-strength bond in seconds.

Popular Applications & Uses

- Rapid assembly of components.- O-ring splicing and production with an O-ring set.- Bonding small electronic parts.- Fixing hard-to-reach breaks and intricate assemblies.- Bonding plastic or rubber parts, such as in car locking units or fire extinguishers.- General maintenance and quick repairs in workshops, manufacturing facilities, and for DIY projects.

Industries that Commonly Use It

- General Manufacturing- Plastic Fabrication- Medical Device/ Prosthetics- LED/Electronics- Automotive Service/Repair- Aerospace/Defense- Government & Military (qualified to Commercial Item Description A-A-3097)- Industrial Supply- Prosumer

Special and Unique Features

- Ultra-low viscosity (20 cP) enables it to flow like water, penetrating tight spaces, hairline cracks, and pre-assembled joints (wicking grade).- Achieves very fast fixturing times, developing handling strength in seconds.- Specifically formulated for optimal bonding of plastics and elastomeric materials.- Exhibits surface-insensitive properties, making it effective on challenging surfaces, especially when used with a primer like Loctite SF 770.- Forms an ultra-thin adhesive film for minimal bond lines.- Cure speed can be enhanced with appropriate activators (e.g., Loctite SF 7452), though testing is recommended.

Key Properties

- **Technology:** Cyanoacrylate- **Chemical Type:** Ethyl cyanoacrylate- **Appearance (uncured):** Transparent, colorless to straw-colored liquid- **Viscosity:** Ultra-low, 20 mPa·s (cP) at 25°C- **Cure Type:** Moisture cure (humidity initiated)- **Fixture Time:** As fast as <5 seconds on neoprene, nitrile rubber, ABS, PVC, phenolic; 10-20 seconds on polycarbonate; 20-45 seconds on steel.- **Full Cure Time:** Approximately 24 hours for full chemical/solvent resistance.- **Operating Temperature Range:** -40°C to 120°C (-40°F to 250°F).- **Shear Strength (Mild Steel, grit blasted):** 15.5 N/mm² (2,250 psi).- **Gap Fill:** Up to 0.12 mm.- **Specific Gravity:** 1.1 at 25°C.

Surface Compatibility

- **Recommended for:** Elastomers, Plastics (including EPDM, ABS, PVC, Polycarbonate, Phenolic, Nylon, PBT, PEI, polyurethane), and Rubbers.- **Also bonds:** Metals (steel, aluminum), wood, leather, fabric, and paper.- **Difficult-to-bond plastics (e.g., PP, PE, PTFE):** Can be bonded effectively when used in conjunction with Loctite SF 770 primer.

Known backups / known substitutes

- Procure PC06 Cyanoacrylate Adhesive (20cps, low viscosity).- Infinity Bond SI 5 (Viscosity 5 cps).- Infinity Bond RP 5 (Viscosity 5 cps).- Zap a Gap Pink Label (low viscosity super glue).- Other industrial-grade cyanoacrylate adhesives with similar low viscosity and fast-curing properties, specifically for plastics and rubbers.

Comparison Note

Loctite 406 is a specialized cyanoacrylate adhesive formulated for superior performance on plastics and rubbers, offering rapid bonding and high strength, particularly for difficult-to-bond surfaces. While general-purpose super glues (also cyanoacrylates) are available for household use, Loctite 406 provides more reliable and durable bonds for industrial and challenging applications where precision and fast fixturing on specific materials are critical. It is distinct from Loctite 401, which is generally more suited for metals and porous substrates.