LOCTITE® 431

Features and Benefits

Available sizes:

Bottle

10.0/case

Bottle

10.0/case
TDS Download
This instant adhesive is ideal for difficult-to-bond materials such as porous and acidic materials. Also used in the assembly of disposable medical devices.
LOCTITE® 431 is a medium viscosity (medical device grade) instant adhesive designed especially for the fast bonding of plastics and rubbers. By using primer LOCTITE® SF 7701, the assembly of difficult-to-bond materials (PP, PE, PTFE) is possible. It has a fixture time of 15 seconds and is well suited for porous and/or acidic surfaces. LOCTITE 431 is tested to Henkel's ISO 10993 protocols for use in disposable medical devices.
  • ISO-10993 biocompatible
  • Assembles difficult-to-bond plastics when LOCTITE SF 7701 primer is used
  • Ideal for bonding small to medium-size parts
  • Fixture time of 5-10 seconds
  • Medium viscosity
  • Excellent adhesion to most substrates
  • Solvent-free
  • Cures very quickly when confined between two surfaces
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Documents and Downloads

Technical Data Sheet
LOCTITE® 431™
Download TDS
Safety Data Sheets and RoHs
  • Bottle 10.0/case - IDH 868371
  • Bottle 10.0/case - IDH 868372
LOCTITE® 431, 20 g Bottle 868371 en-CA
IDH: 868371
EAN: 079340412552

Size Case: Bottle

Quantity: 10.0/case

Download SDS

Download RoHs
LOCTITE® 431, 1 lb Bottle 868372 en-CA
IDH: 868372
EAN: 079340412569

Size Case: Bottle

Quantity: 10.0/case

Download SDS

Download RoHs
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Technical Information

Color Ultra clear
Fixture time 5.0 - 10.0 sec.
Gap fill 0.15 mm

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 7701™ 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 713™ (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 713™. Spray or drop activator onto excess product.

Frequently Asked Questions