Product category: Instant adhesives
- Technical specifications
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)
Agency approvals / certificates / specifications:
Commercial Item Std. A-A-3097
Bonding Plastic,Bonding Rubber
Fixture time, Steel:
Fixture: Very Fast Fixture,Viscosity: Low Viscosity
-40.0 °F - 180.0 °F (-40.0 °C - 80.0 °C)
Recommended for use with:
Shear strength, Mild Steel (grit blasted):
3500.0 psi (24.0 N/mm²)
Specific gravity, @ 25.0 °C:
90.0 mPa·s (cP)
How to use
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.
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.
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.
Apply adhesive onto one side/part.
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.
LOCTITE® 404 (also included in the LOCTITE® O-ring Splicing Kit - IDH 228171) is an easy to use solution for creating o-rings in less than a minute. It is ideal as a supplement to existing o-ring inventory to eliminate out of stock situations, or as a handy field repair kit.
This is a result of stress cracking. Leaving uncured liquid CA remaining on some plastic substrates (such as polycarbonate, acrylic, and polysulfone) in a stressed condition, may cause the formation of cracks in the plastic. Some remedies for avoiding/minimizing stress cracking are closing the bond joint quickly, using reinforced grades of plastic, anneal parts, or speed cure the adhesive with accelerator or light (for light cure products only).
This is called blooming. This often occurs when there is an excessive amount of product being applied. To avoid blooming, use proper ventilation, less product, lower humidity, use a primer/accelerator, or a low bloom product.
Yes, instant adhesives should be stored in the refrigerator prior to opening, but DO NOT refrigerate them once they have already been opened. After opening, the product should be used within 30 days for best performance.
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