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LOCTITE® 401 Instant Adhesive

Known as Loctite 401 Prism Instant Adhesive

Features and Benefits

A surface-insensitive, fast-fixturing instant adhesive that provides high shear strength on a wide range of materials, including difficult-to-bond substrates.
LOCTITE® 401 is a fast-fixturing instant adhesive (industrial grade) designed for the assembly of a wide range of materials where uniform stress distribution and high tensile and/or shear strength are required. Using primer LOCTITE® SF 770, the assembly of difficult-to-bond (PP, PE, PTFE) materials is possible. In addition, it is suited for bonding porous materials such as wood, paper, leather and fabric.
  • Universal industrial instant adhesive
  • Very high strength on close-fitting parts
  • Reduced hazardous ingredients for improved occupational safety
  • Bonds a wide range of similar or dissimilar substrates (metals, rubber, wood, cardboard, ceramics, as well as most plastics)
  • Assembles difficult-to-bond materials using LOCTITE® SF 770 primer
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Documents and Downloads

Safety Data Sheets and RoHs
LOCTITE® 401, 1 lb Bottle 135430 en-US
IDH: 135430
EAN: 079340401617

Size Case: 1 lb Bottle

Quantity: 10.0/case

No documents found

Technical Information

Application method Dispense System, Manual
Applications Bonding Close Fitting Parts, Repairing
Color Clear
Cure type Moisture Cure
Fixture time, Steel 5.0 sec.
Gap fill 0.15 mm
Key characteristics Fixture: Very Fast Fixture, General Purpose, Strength: High Strength, Viscosity: Low Viscosity
Operating temperature -40.0 - 120.0 °C (-40.0 - 250.0 °F )
Physical form Liquid
Recommended for use with Elastomer, Metal, Plastic, Porous Surface
Shear strength, Mild Steel (grit blasted) 20.0 N/mm² (2900.0 psi )
Viscosity 100.0 mPa·s (cP)

How to

Step by Step Guide

1. Preparation - Cleaning

It is recommended to use the correct LOCTITE® cleaner for the surface to be bonded (such as LOCTITE® SF 7070™) to degrease and clean surfaces prior to applying the adhesive.

2. Preparation - Priming

To improve adhesion on difficult to bond plastic surfaces, apply LOCTITE® SF 770™ to the bond area by brushing or dipping. Avoid applying excess primer. Allow the primer to dry.

3. Preparation - Activation

If cure speed is too slow, use activator LOCTITE® SF 7452™ or LOCTITE® SF 7455™ (see cure speed vs activator graph in TDS). Apply activator to one bond surface by spray, brush or dipping (not primed surfaces). Allow the activator to dry.

4. Application

Apply adhesive onto one side/part.

5. Assembly

Assemble parts immediately. The parts should be accurately located as the short fixture time leaves little opportunity for adjustment. Bond should be held or clamped until the adhesive has fixtured. Hint: if necessary, excess product can be cured by activator LOCTITE® SF 7458™ or LOCTITE® SF 7452™. Spray or drop activator onto excess product.


For precise dispensing of small amounts of adhesive, the use of dispensing needles is recommended.

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A surface-insensitive, fast-fixturing instant adhesive that provides high shear strength on a wide range of materials, including difficult-to-bond substrates.

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    Frequently Asked Questions