LOCTITE® 404 Instant Adhesive
Known as LOCTITE 404 Quick Set Instant Adhesive
Features and Benefits
A low viscosity, instant adhesive designed for rubber (elastomeric) materials and plastics where very fast-fixturing is required. Ideal for O-ring assembly.
LOCTITE® 404 is a transparent, colorless to straw colored, low viscosity instant adhesive (industrial grade) designed for bonding of plastics and elastomeric materials. It allows for very fast-fixturing for ease of assembly and handling, especially suited for quick repairs. It has been qualified to Commercial Item Description A-A-3097 (Note: This is a regional approval).
- Ideal for O-ring assembly
- Designed for bonding of rubber (elastomeric) materials and plastics
- Ideal for quick repairs
- Qualified to Commercial Item Description A-A-3097 (This is a regional approval)
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Agency approvals / certificates / specifications | Commercial Item Std. A-A-3097 |
| Application method | Manual |
| Applications | Bonding Plastic, Bonding Rubber |
| Color | Clear |
| Cure type | Moisture Cure |
| Fixture time, Steel | 20.0 sec. |
| Gap fill | 0.15 mm |
| Key characteristics | Fixture: Very Fast Fixture, Viscosity: Low Viscosity |
| Operating temperature | -40.0 - 180.0 °F (-40.0 - 80.0 °C ) |
| Physical form | Liquid |
| Recommended for use with | Elastomer, Plastic, Rubber |
| Shear strength, Mild Steel (grit blasted) | 3500.0 psi (24.0 N/mm² ) |
| Specific gravity, @ 25.0 °C | 1.09 |
| Viscosity | 90.0 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 appropriate activator LOCTITE® SF 7452™ (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.
Equipment
For precise dispensing of small amounts of adhesive, the use of dispensing needles is recommended.
Frequently Asked Questions
Are there any instant adhesive solutions for making replacement, high performance O-rings?
Why does the plastic crack when I use an instant adhesive?
Why is there a white haze on my parts around the bond area?
Do instant adhesives need to be refrigerated?
LOCTITE® 404
A low viscosity, instant adhesive designed for rubber (elastomeric) materials and plastics where very fast-fixturing is required. Ideal for O-ring assembly.