Instant adhesives
Instant component bonding - ultra performance
A fast-fixturing, ultra-performance instant adhesive that provides reliable performance under extreme operating temperatures up to 135°C (275°F). It is suitable for use in medical device assembly.
All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.
Size Please make your selection 20 g
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- Description
- Technical specification
- Ratings & reviews
- Question & answer
LOCTITE® 402 is a high temperature and fast-fixturing instant adhesive that reliably and strongly bonds to a wide range of plastic, rubber, and metal substrates. It is ideally suited for the joining of small parts in high-speed production applications as well as quick, on-the-go repairs. Using the primer LOCTITE SF 770 (or LOCTITE SF 7701 for medical device assembly), the assembly of difficult-to-bond (PP, PE, PTFE) materials is possible.
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Ultra-performance adhesive providing resistance up to 135°C (275°F) and fast fixture
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ISO-10993 biocompatible
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Ideal for quick repairs and high speed production applications
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Unique, patented formula with reduced hazardous ingredients
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Assembles difficult-to-bond materials using LOCTITE SF 770 or SF 7701 primer
- Product category:
- Instant adhesives
Technologies:
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Cyanoacrylate
- Application method:
- Dispense system,Manual
- Applications:
- High speed production bonding,Repairing
- Color:
- Clear
- Cure type:
- Moisture cure
- Fixture time, Steel (grit blasted):
- 20.0 sec.
- Gap fill:
- 0.15 mm
- Key characteristics:
- Fast setting,For difficult-to-bond materials,Temperature resistant
- Operating temperature:
- -40.0 °C - 135.0 °C
- Physical form:
- Liquid
- Recommended for use with:
- Elastomer,Metal,Plastic,Porous surface
- Shear strength, Mild Steel (grit blasted):
- > 15.0 N/mm² (> 2100.0 psi)
- Viscosity:
- 110.0 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 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.
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 7452 or LOCTITE® SF 7455. Spray or drop activator onto excess product.
For precise dispensing of small amounts of adhesive, the use of dispensing needles is recommended.
FAQ
Although HQ is not part of the product formula for LOCTITE® 402, trace amounts are possible due to shared manufacturing processes and/or select raw material impurities. Hence, Henkel has taken the additional step of introducing a low specification level (< 50 PPM for HQ) and each batch is now checked for this after manufacture.
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 the cure of the CA with accelerator or light (for light cure products only).
All necessary H&S measures and PPE (personal protection equipment) requirements can be found on the product material safety data sheet, all of which are available via our website.
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.
Henkel has several products available with varying levels of NSF® approval, amongst others. Please contact the Henkel sales or technical teams with your requirements.
LOCTITE® Medical Device Grade Adhesives have been tested to Henkel's ISO-10993 biocompatibility protocols, making them candidates for use in disposable medical devices. They are not intended for implants (and invasive) prostheses.
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