LOCTITE® 403 Instant Adhesive
Features and Benefits
A low odor, low bloom, medium-viscosity instant adhesive ideal for aesthetic applications.
LOCTITE® 403 is a low odor, low-bloom instant adhesive. This medium viscosity adhesive is ideal for applications where odor and/or blooming are a concern. LOCTITE 403 provides for rapid bonding of metals, elastomers and plastics, including difficult-to-bond plastics (PP, PE, PTFE) when used in conjunction with a primer such as LOCTITE SF 770.
- Low odor for applications where vapor control is vital
- Low bloom for cosmetic applications
- Medium viscosity for gaps of approximately 0.008in
- Bonds plastics, rubbers and metals
Documents and Downloads
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Technical Information
| Application method, Recommended | Dispense system, Manual |
| Applications, Recommended | Bonding close fitting parts |
| Color | Ultra clear |
| Fixture time, Steel | 30.0 sec. |
| Gap fill | 0.2 mm |
| Key characteristics, Recommended | Bloom: low bloom, Gap filling, Odor: low odor, Surface insensitive, Viscosity: medium viscosity |
| Operating temperature | -40.0 - 80.0 °C (-40.0 - 175.0 °F ) |
| Shear strength, Mild Steel (grit blasted) | 20.3 N/mm² (2950.0 psi ) |
| Viscosity | 1200.0 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 7063 or 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 7455 or LOCTITE® SF 7452. Apply activator to one bond surface by spray, brush or dipping (not primed surfaces). Allow the activator to dry.
4. Application
Apply adhesive to one side or part. Recommended dispensing equipment: for precise dispensing of small amounts of adhesive, use dispensing needles.
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 7455 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
What does it mean when an instant adhesive (CA) is "low odor/low bloom"?
Why is there a white haze on my parts around the bond area?
Why does my plastic crack when I use an instant adhesive (CA)?
Do instant adheisves (CA) need to be refrigerated?
Which products are food / drinking water approved?
What health and safety (H&S) precautions do I need to take when using this adhesive?
LOCTITE® 403
A low odor, low bloom, medium-viscosity instant adhesive ideal for aesthetic applications.