LOCTITE® 406 Instant Adhesive Glue | 25mL | 40633-25 | Low Viscosity Plastic & Rubber Adhesive

Ultra-Fast Low-Viscosity Cyanoacrylate Adhesive for Plastics, Rubber, Elastomers and Close-Fitting Components

Supply Solutions Group supplies LOCTITE® 406 Instant Adhesive Glue – 25mL (40633-25) to organisations operating across manufacturing, engineering, automotive, mining, maintenance, electronics, equipment repair and industrial workplaces throughout Australia.

LOCTITE 406 is a professional instant adhesive specifically formulated for the rapid bonding of plastics, rubber and elastomeric materials.

Manufactured by Henkel, LOCTITE 406 is a one-component cyanoacrylate adhesive with exceptionally low viscosity, allowing it to flow easily between close-fitting components and form an ultra-thin adhesive bondline.

The product fixtures extremely quickly, making it particularly suitable for production, assembly and maintenance applications where parts need to be bonded within seconds.

LOCTITE 406 is especially recommended for bonding appropriate:

• Plastics

• Rubber

• Elastomers

• EPDM

• NBR

• SBR

• Nitrile

• Other close-fitting compatible materials

The adhesive's low-viscosity formulation allows it to wick readily into narrow bond areas and very small component gaps.

Henkel specifies a typical viscosity of approximately:

20 mPa·s

with a typical Technical Data Sheet range of approximately 12–22 mPa·s at 25°C.

This makes LOCTITE 406 particularly suited to applications where an extremely thin adhesive film is required.

Henkel specifies a maximum gap fill of approximately:

0.12mm

For optimal results, mating components should therefore be smooth and close fitting.

LOCTITE 406 cures through exposure to atmospheric moisture.

When the adhesive is confined between close-fitting surfaces, moisture present on the substrates initiates rapid polymerisation.

The product forms handling strength within seconds on many compatible plastics and elastomers.

Henkel's current product specification lists a typical fixture time on steel of approximately:

30 seconds

Actual fixture speed depends heavily on substrate material, humidity, bond gap and temperature.

On certain plastics and rubbers, fixture can occur considerably faster.

LOCTITE 406 is particularly recognised for rapid bonding of rubber and elastomeric materials, including EPDM.

This makes it valuable in industrial maintenance applications involving:

• Rubber seals

• Elastomeric components

• Plastic housings

• Flexible components

• Small production assemblies

For plastics that are naturally difficult to bond, including:

• Polypropylene (PP)

• Polyethylene (PE)

• PTFE

Henkel recommends the use of LOCTITE SF 770 Primer to improve adhesion.

The adhesive is supplied as a clear liquid, helping provide a clean appearance in suitable precision-bonding applications.

Henkel specifies an operating temperature range of approximately:

-40°C to 120°C

making LOCTITE 406 suitable for a broad range of industrial and mechanical operating conditions.

The convenient 25mL bottle provides a practical quantity for workshops, maintenance teams, manufacturers and technicians carrying out repeated precision bonding work.

This listing contains 1 × 25mL LOCTITE 406 Instant Adhesive Glue – Product Reference 40633-25.

As an Indigenous-owned industrial supplier and procurement partner, Supply Solutions Group provides LOCTITE instant adhesives, primers, activators, threadlockers, retaining compounds, gasket sealants, lubricants and industrial maintenance consumables backed by responsive customer service, procurement support and Australia-wide business supply capability.

Product Type

• Product Type: Instant Adhesive

• Brand: LOCTITE®

• Manufacturer: Henkel

• Product: LOCTITE 406

• Product Reference: 40633-25

• Current Australian 25mL IDH: 265606

• Pack Size: 25mL

• Technology: Cyanoacrylate

• Components: One Component

• Cure Type: Moisture Cure

• Colour: Clear

• Physical Form: Liquid

• Viscosity: Very Low

• Typical Viscosity: Approx. 20 mPa·s

• TDS Viscosity Range: Approx. 12–22 mPa·s

• Maximum Gap Fill: Approx. 0.12mm

• Fixture Time on Steel: Approx. 30 Seconds

• Operating Temperature: Approx. -40°C to 120°C

• Primary Applications: Plastic, Rubber & Elastomer Bonding

• Primer for Difficult Plastics: LOCTITE SF 770

Key Features

• Genuine LOCTITE® industrial adhesive

• Manufactured by Henkel

• LOCTITE 406

• 25mL bottle

• Product reference 40633-25

• Australian 25mL IDH 265606

• Instant cyanoacrylate adhesive

• One-component formulation

• No mixing required

• Exceptionally low viscosity

• Approx. 20 mPa·s viscosity

• Forms an ultra-thin adhesive film

• Designed for very small bond gaps

• Gap fill up to approximately 0.12mm

• Very fast fixture performance

• Typical fixture time on steel approximately 30 seconds

• Particularly fast on plastics and rubber

• Suitable for plastics

• Suitable for rubber

• Suitable for elastomeric materials

• Suitable for EPDM

• Suitable for NBR

• Suitable for SBR

• Suitable for nitrile

• Clear adhesive

• Moisture curing

• Suitable for close-fitting components

• LOCTITE SF 770 improves bonding of PP, PE and PTFE

• Operating range approximately -40°C to 120°C

• Suitable for production assembly

• Suitable for maintenance

• Suitable for component repair

• Suitable for industrial manufacturing

Technical Specifications

Specification Details
Brand	LOCTITE®
Manufacturer	Henkel
Product	406
Product Type	Instant Adhesive
Product Reference	40633-25
Current Australian 25mL IDH	265606
Pack Size	25mL
Technology	Cyanoacrylate
Components	One Component
Cure Type	Moisture Cure
Colour	Clear
Physical Form	Liquid
Viscosity Classification	Very Low
Typical Resin Viscosity	Approx. 20 mPa·s
TDS Viscosity Range @ 25°C	Approx. 12–22 mPa·s
Specific Gravity @ 25°C	Approx. 1.1
Maximum Gap Fill	Approx. 0.12mm
Typical Fixture Time – Steel	Approx. 30 Seconds
Operating Temperature	Approx. -40°C to 120°C
Typical Shear Strength – Grit-Blasted Mild Steel	Approx. 15.5 N/mm²
Primary Substrates	Plastics, Rubber & Elastomers
Difficult-Plastic Primer	LOCTITE SF 770
Manual Application	Yes
Dispensing-System Application	Yes

Typical Applications

• Plastic component bonding

• Rubber component bonding

• Elastomer bonding

• EPDM bonding

• Nitrile rubber bonding

• NBR bonding

• SBR bonding

• Rubber seals

• Plastic housings

• Small mechanical components

• Close-fitting assemblies

• Appliance components

• Production assembly

• Manufacturing repairs

• Workshop maintenance

• Equipment servicing

• Automotive component repair

• Industrial component bonding

• Precision assembly

• General maintenance

Suitable Industries

• Manufacturing

• Engineering

• Automotive

• Mining and resources

• Industrial maintenance

• Equipment manufacturing

• Home appliance manufacturing

• Mechanical workshops

• Electronics assembly

• Rubber fabrication

• Plastic fabrication

• Transport

• Utilities

• Infrastructure

• Remanufacturing

• Maintenance and repair

• Trades and contracting

Why Choose LOCTITE® 406 Instant Adhesive?

LOCTITE 406 is specifically engineered for applications requiring rapid bonding and an extremely thin adhesive bondline.

Its very low viscosity allows the adhesive to flow easily into tight interfaces between closely fitting parts.

This makes it particularly useful where thicker instant adhesives may not penetrate adequately into the bond area.

The product is especially well suited to:

• Plastic components

• Rubber parts

• Elastomeric materials

• Precision assemblies

• Close-fitting joints

Exceptionally Low Viscosity

LOCTITE 406 has a typical viscosity of approximately:

20 mPa·s

Henkel's current TDS specifies a viscosity range of approximately:

12–22 mPa·s at 25°C

This extremely low viscosity allows the adhesive to spread rapidly through small gaps.

Benefits include:

• Thin bondlines

• Rapid wetting

• Easy penetration into close joints

• Controlled precision bonding

• Fast assembly

Because of its low viscosity, care should be taken to prevent excessive adhesive flowing beyond the intended bond area.

Designed for Plastics & Rubber

LOCTITE 406 is specifically formulated for the rapid bonding of:

Plastics and elastomeric materials

Henkel highlights very fast fixture performance on rubber, including:

EPDM

This makes the product useful for bonding suitable:

• Rubber seals

• Rubber mouldings

• Elastomeric components

• Plastic parts

• Flexible components

EPDM Bonding

EPDM can be challenging to bond using some general-purpose adhesives.

Henkel specifically identifies rapid fixture performance on EPDM as a major characteristic of LOCTITE 406.

This can make the adhesive particularly valuable in maintenance and production environments involving rubber sealing components.

Other Rubber Applications

Australian product information also identifies compatibility with appropriate:

• NBR

• SBR

• Nitrile rubber

Actual bond performance should be confirmed on the specific rubber formulation because elastomer compositions can vary significantly.

Difficult-to-Bond Plastics

Some plastics have very low surface energy and are difficult to bond with conventional cyanoacrylate adhesives.

Examples include:

• Polypropylene

• Polyethylene

• PTFE

Henkel recommends LOCTITE SF 770 Primer for these materials.

The primer modifies the surface so that LOCTITE 406 can achieve better adhesion.

LOCTITE SF 770 Primer

For difficult plastics:

1. Ensure the surface is clean.

2. Apply LOCTITE SF 770 Primer to the required bonding area.

3. Avoid excessive primer application.

4. Allow the primer to dry.

5. Apply LOCTITE 406.

6. Assemble components immediately.

Always follow the current SF 770 and LOCTITE 406 Technical Data Sheets.

Maximum Gap Fill

Henkel specifies a gap-fill capability of approximately:

0.12mm

LOCTITE 406 is therefore best suited to:

Very close-fitting parts

It is not intended as a large-gap filling adhesive.

Where larger gaps are present, a higher-viscosity or dedicated gap-filling instant adhesive may be more appropriate.

Rapid Fixture

Henkel lists a typical fixture time on steel of approximately:

30 seconds

Fixture times on rubber and plastic can be significantly faster depending on:

• Substrate

• Bond gap

• Humidity

• Temperature

• Surface condition

Parts should be positioned accurately before bringing them together because the rapid fixture speed provides limited time for adjustment.

Moisture Cure Technology

LOCTITE 406 is a moisture-curing cyanoacrylate.

Trace moisture naturally present on the bonding surfaces initiates polymerisation.

Henkel specifies optimal curing performance at approximately:

40% to 60% relative humidity at 22°C

Lower humidity slows cure.

Very high humidity may accelerate curing but can adversely affect final bond strength.

Activator for Slow Cure

Where cure speed is too slow because of larger permissible gaps or difficult conditions, Henkel recommends an appropriate cyanoacrylate activator such as:

LOCTITE SF 7452

Activator can increase cure speed but may reduce ultimate bond strength.

Testing should therefore be carried out where final performance is critical.

Operating Temperature

LOCTITE 406 has an operating temperature range of approximately:

-40°C to 120°C

This supports use across a variety of industrial applications exposed to moderate cold and elevated operating temperatures.

Actual bond durability will depend on:

• Substrate

• Joint design

• Mechanical loading

• Chemical exposure

• Temperature cycling

• Cure conditions

High Bond Strength

Henkel specifies a typical shear strength on grit-blasted mild steel of approximately:

15.5 N/mm²

under the manufacturer's stated laboratory test conditions.

This is a test value rather than a guaranteed performance figure for every application.

Actual strength varies significantly by substrate and joint geometry.

Surface Preparation

For optimum bonding:

1. Ensure surfaces are clean.

2. Remove oil, grease and contamination.

3. Use an appropriate LOCTITE cleaner where required.

4. Allow cleaned surfaces to dry.

5. Apply primer where difficult-to-bond plastics are involved.

6. Apply a small quantity of LOCTITE 406 to one surface.

7. Assemble parts immediately.

8. Hold components until fixture strength develops.

Cyanoacrylate adhesives generally perform best when only enough adhesive is used to fill the joint.

Application

LOCTITE 406 can be applied:

• Manually

• Using precision dispensing equipment

For accurate small-volume application, Henkel recommends suitable dispensing needles.

This can be particularly valuable in production environments where repeatable adhesive quantity is important.

Avoid Excess Adhesive

Applying excessive cyanoacrylate does not necessarily create a stronger joint.

A thick adhesive layer can:

• Slow cure

• Reduce performance

• Increase blooming

• Create unnecessary squeeze-out

LOCTITE 406 is specifically designed for thin, close-fitting bonds.

Storage

Henkel advises that instant adhesives should generally be refrigerated before opening according to the product storage instructions.

Once opened, Henkel advises against returning the container to refrigeration.

For best performance after opening:

• Keep the nozzle clean

• Close the bottle securely

• Prevent moisture contamination

• Store according to manufacturer instructions

• Use within the recommended period

• Observe the expiry date

Always follow the storage information on the current product label and SDS.

Important Safety Information

Cyanoacrylate instant adhesives bond skin and eyes extremely quickly.

Users should:

• Read the current Henkel Safety Data Sheet

• Avoid skin contact

• Avoid eye contact

• Wear suitable eye protection

• Use appropriate workplace ventilation

• Keep fingers away from bonding surfaces

• Do not deliberately contact cotton or wool with uncured cyanoacrylate

• Keep out of reach of children

• Follow workplace chemical-handling procedures

Cyanoacrylate can react rapidly with certain natural fibres such as cotton or wool and may generate significant heat.

Why Buy from Supply Solutions Group?

Supply Solutions Group is an Indigenous-owned Australian supplier of instant adhesives, engineering adhesives, primers, activators, sealants, lubricants and industrial maintenance products, providing LOCTITE products backed by procurement support and Australia-wide business supply capability.

Benefits of Partnering with Supply Solutions Group

• Australia-wide business supply capability

• Indigenous-owned and operated business

• Genuine LOCTITE product supply

• Henkel industrial adhesives

• Instant adhesives

• Plastic adhesives

• Rubber adhesives

• Cyanoacrylate products

• LOCTITE primers

• LOCTITE activators

• Threadlockers

• Thread sealants

• Retaining compounds

• Gasket products

• Engineering adhesives

• Mining maintenance products

• Manufacturing consumables

• Mechanical workshop supplies

• Procurement support services

• Trade account options

• Bulk purchasing solutions

• Product sourcing assistance

• Responsive customer service

• Ongoing commercial supply arrangements

Frequently Asked Questions

What is LOCTITE 406?
LOCTITE 406 is an exceptionally low-viscosity instant cyanoacrylate adhesive specifically designed for rapid bonding of plastics, rubber and elastomeric materials.

How much adhesive is supplied?
This listing contains 1 × 25mL bottle.

What is the product reference?
The Supply Solutions Group product reference is 40633-25.

What is the current Australian 25mL Henkel IDH?
Current Australian trade listings identify the 25mL configuration as IDH 265606.

What colour is LOCTITE 406?
It is clear.

Is LOCTITE 406 a super glue?
It is an industrial cyanoacrylate instant adhesive, the same broad adhesive technology commonly referred to as super glue.

What is the viscosity?
Henkel lists approximately 20 mPa·s, with the current TDS specifying approximately 12–22 mPa·s at 25°C.

Is LOCTITE 406 low viscosity?
Yes. Exceptionally low viscosity is one of the product's defining features.

What gap can LOCTITE 406 fill?
Henkel specifies approximately 0.12mm maximum gap fill.

Is it suitable for large gaps?
No. LOCTITE 406 is designed for very close-fitting parts. A dedicated gap-filling adhesive should be used where larger clearances exist.

How quickly does LOCTITE 406 fixture?
Henkel specifies a typical steel fixture time of approximately 30 seconds. Some plastics and rubbers can fixture much faster.

Is LOCTITE 406 suitable for rubber?
Yes. Rubber and elastomer bonding are primary applications.

Can it bond EPDM?
Yes. Henkel specifically highlights very rapid fixture performance on EPDM.

Can it bond nitrile rubber?
Australian product information identifies nitrile / NBR among the suitable rubber applications.

Can it bond SBR?
Yes. SBR is also listed among typical rubber substrates.

Can it bond plastic?
Yes. LOCTITE 406 is specifically designed for plastic bonding.

Can LOCTITE 406 bond polypropylene?
Polypropylene is difficult to bond directly. Henkel recommends using LOCTITE SF 770 Primer before applying 406.

Can it bond polyethylene?
Yes, with suitable surface preparation using LOCTITE SF 770 Primer.

Can it bond PTFE?
PTFE can be bonded using the appropriate LOCTITE SF 770 Primer system.

Does LOCTITE 406 require mixing?
No. It is a one-component adhesive.

How does it cure?
It cures through a moisture-initiated cyanoacrylate reaction when confined between close-fitting surfaces.

What temperature range is LOCTITE 406 rated for?
Henkel specifies approximately -40°C to 120°C.

What relative humidity is best for curing?
Henkel states that best results are typically achieved around 40% to 60% relative humidity at 22°C.

What happens in very dry conditions?
Lower humidity generally slows cyanoacrylate cure.

Can I use an activator to speed curing?
Yes. Henkel identifies LOCTITE SF 7452 where cure speed is unacceptably slow. Activator use can reduce final strength, so testing is recommended.

Can LOCTITE 406 bond metal?
Cyanoacrylate technology can bond metal, but LOCTITE 406 is specifically optimised for plastics and elastomers. Another LOCTITE instant adhesive may be preferable where metal is the primary substrate.

Can LOCTITE 406 be refrigerated?
Henkel recommends refrigerated storage for unopened instant adhesives according to the applicable storage instructions. Once opened, follow the current Henkel guidance and product label.

Does the adhesive bond skin quickly?
Yes. Cyanoacrylate adhesives can bond skin and eyes within seconds. Handle carefully and follow the SDS.

Can Supply Solutions Group supply LOCTITE SF 770 Primer?
Yes. Supply Solutions Group can assist with LOCTITE SF 770 and other compatible primers and activators, subject to availability.

Can Supply Solutions Group supply other LOCTITE instant adhesives?
Yes. Supply Solutions Group can assist with LOCTITE 401, 406, 410, 435, 454, 460, 480, 4850, 495 and other instant adhesive grades, subject to availability.

Can Supply Solutions Group provide bulk quantities?
Yes. Bulk and ongoing procurement arrangements are available for manufacturers, engineering businesses, workshops, mine sites and industrial maintenance operations.