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PERMABOND 4C40

PERMABOND 4C40

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High-viscosity medical-device-grade cyanoacrylate for large gap filling.

High-viscosity medical-device-grade cyanoacrylate for large gap filling — faster set times and improved gap filling capacity vs. conventional cyanoacrylates, also for difficult-to-bond polyacetals

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  • Container
  • Chemical group
  • Viscosity at 25°C
  • Specific gravity
  • Maximum gap width (mm)
  • Steel hand strength (sec.)
  • Rubber's hand strength (sec.)
  • Hand strength of phenol (seconds)
  • Curing time at 23°C
  • Steel
  • Impact resistance (astm D-950)
  • dielectric constant
  • Hardness (Shore D)
  • Storage temperature (°C)
  • Viscosity (adhesives)

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High viscosity Medical ISO 10993-5 Cytotoxicity USP CLASS VI PERMABOND Cyanoacrylate Adhesive Medical Adhesive

 
General Terms and Conditions.

Shipping usually within 1 to 3 business days
(availability will be confirmed after ordering)

. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

Internal reference: 49-4C40

HS code: 350691900

Internal reference: 49-4C40
HS code: 350691900

PERMABOND 4C40
PERMABOND 4C40
Permabond · Permabond Engineering Adhesives Ltd · SKU 49-4C40

Permabond 4C40 is a high-viscosity, medical-device-grade cyanoacrylate for large gap filling — faster set times and improved gap filling capacity vs. conventional cyanoacrylates, also for difficult-to-bond polyacetals.

Permabond cyanoacrylate instant adhesives in medical device grade — biocompatible (ISO 10993), solvent-free, cross-link in seconds through surface moisture between the components. 4C40 is tailored to specific applications — the most important properties and areas of use are listed below.

Large gap filling + polyacetal

Permabond 4C40 is a medium-high viscosity, medical-grade variant — faster than conventional cyanoacrylates, with improved gap-filling properties. Excellent on difficult-to-bond polyacetals (POM).

4C40 in numbers
High viscosity
large gap
Medical
Device Grade
Polyacetal
POM-compatible
Instant
Setting

What distinguishes 4C40

High viscosity
Gaps up to ~0.5 mm, vertical application possible.
Polyacetal-compatible (POM)
Highly adhesive polymer with poor adhesion.
Faster than conventional CAs
Shorter curing times.
Large gap filling
Tolerance compensation during assembly.
Multi-substrate
Metals, ceramics, plastics, elastomers.

What is 4C40 used for?

Medical devices with POM components
Polyacetal assembly with medical compliance.
Large gap bonding
Gaps up to ~0.5 mm can be safely filled.
Vertical application
High viscosity prevents runoff.
Engineering plastic
Polymers that are difficult to bond.
Multi-material assembly
Metals, plastics, and elastomers combined.
Data sheets & safety data sheet
TDS and SDS in multiple languages ​​— watch or download directly.
To the documents →

processing

1
clean substrate
Degrease bonding surfaces with Permabond Cleaner A or acetone/isopropanol — a clean surface is critical for medical device bonding.
2
Polyolefin primer (if required)
For PP, PE, PTFE or silicone: Brush on Permabond POP Primer, let it dry briefly — otherwise no CA adhesion is possible.
3
CSA activator (if required)
For porous or difficult substrates: Spray on CSA aerosol, allow to evaporate — accelerates CA curing.
4
Apply cyanoacrylate sparingly
Apply a drop or thin bead to an adhesive surface — not on both sides, otherwise the reaction will be too rapid.
5
Joining + Pressing
Join components immediately and correctly aligned, press with defined pressure — adhesive spreads into a thin film.
6
Curing
Handling strength after seconds to minutes depending on the substrate. Final strength after 24 hours. Medical device compliance after full crosslinking.

Recommended accessories

Permabond Activator CSA Aerosol
CA activator as a spray — accelerates curing, activates porous or difficult substrates.
View product →
Permabond POP Primer
Polyolefin primer for CA bonding of PP, PE, PTFE and silicone.
View product →
Permabond Cleaner A Aerosol
Universal industrial cleaner as a spray — standard preparation before Permabond bonding.
View product →
Permabond CA Solvent 2
Gentle CA solvent — removes hardened CA residues, non-flammable.
View product →

4C40 in comparison

Direct comparison with related Permabond products in our range.

4C40
Current product		 4C30 →4C10 →4UV80HV →
Chemical basisCyanoacrylate (ethyl ester)Cyanoacrylate (ethyl ester)Cyanoacrylate (ethyl ester)Methacrylate esters
viscosityhigh viscositymedium viscositylow viscosityhighly viscous, opaque
GradeMedical DeviceMedical DeviceMedical DeviceMedical Device (ISO 10993-5)
Colorcolorlesscolorlesscolorlessopaque
SetTime~60 s~30 s<10 s (typical)UV Cure (sec.)
Full Cure24 h24 h24 hUV-exposed
Main applicationLarge gap + POMAuto-dispense, middle columnHard-to-adhere rubbersUV Medical Device
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
High viscosity Medical ISO 10993-5 Cytotoxicity USP CLASS VI PERMABOND Cyanoacrylate Adhesive Medical Adhesive

Technical data for PERMABOND 4C40

All 17 product information 4 Performance at final strength 1 Physical properties 4 Electrical properties 1 Curing values ​​4 Mechanical properties 1 Shear strength ISO 4587 in N/mm² 1 Thermal properties 1
Product information
brand Permabond
Manufacturer Permabond Engineering Adhesives Ltd
Container 30 g, 500 g
Curing time at 23°C 24 hours
Performance at final strength
Impact resistance (astm D-950) 3-5 kJ/m²
Physical properties
Chemical group Ethyl cyanoacrylate
Viscosity at 25°C 1200-2400
Specific gravity 1.1
Viscosity (adhesives) High viscosity >5000 mPas
Electrical properties
dielectric constant 4,5
Curing values
Maximum gap width (mm) 0.43
Steel hand strength (sec.) 5-10
Rubber's hand strength (sec.) 5-10
Hand strength of phenol (seconds) 5-10
Mechanical properties
Hardness (Shore D) 85
Shear strength ISO 4587 in N/mm²
Steel 20-22
Thermal properties
Storage temperature (°C) 2-7

For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.

Documents and datasheets

Click on a document for a preview or the download icon for a direct download.

Technical Data Sheets (TDS) 2
Permabond 4C40 - Technical Data Sheet EN.pdf
367 KB
Permabond 4C40 - Fiche Technique FR.pdf
341 KB
Safety Data Sheets (SDS) 3
Permabond 4C40 - Safety Data Sheet DE.pdf
334 KB
Permabond 4C40 - Safety Data Sheet EN.pdf
311 KB
Permabond 4C40 - Fiche de Sécurité FR.pdf
333 KB

Frequently asked questions about 4C40

Practical application and design questions — answered by SILITECH.

Permabond 4C40: High-viscosity, medical-device-grade cyanoacrylate for large gap filling — faster set times and improved gap filling capacity compared to conventional cyanoacrylates, also suitable for difficult-to-bond polyacetals. Main applications: Medical devices with POM components, large gap bonding, vertical applications.

Medical-device-grade cyanoacrylates meet enhanced purity standards for medical applications—typically ISO 10993 tests (biocompatibility, cytotoxicity). They have the same instant curing chemistry as standard CAs (crosslinking by surface moisture), but with controlled purity of ingredients for use in medical devices with patient contact or in pharmaceutical products.

Store in the unopened original container in a dry, cool place — Permabond adhesives typically between +5 and +25 °C, see TDS for exact values. Consult the Safety Data Sheet (SDS) before use. Observe the expiry date on the packaging. Store cyanoacrylates in a cool place (ideally refrigerated) for maximum shelf life.

The comparison table above lists related Permabond products with different properties—viscosity, mixing ratio, special certification. If you are unsure which product is best, we would be happy to advise you—contact SILITECH with your specific application (substrate pairing, load, curing conditions).

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Our technical team will advise you personally on material selection, processing questions, and individual requirements. Quickly and competently.

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Product specifications

Product information
Container 30 g or 500 g
brand Permabond
Manufacturer Permabond Engineering Adhesives Ltd
Curing time at 23°C 24 hours
Performance at final strength
Impact resistance (astm D-950) 3-5 kJ/m²
Physical properties
Chemical group Ethyl cyanoacrylate
Viscosity at 25°C 1200-2400
Specific gravity 1.1
Viscosity (adhesives) High viscosity >5000 mPas
Electrical properties
dielectric constant 4,5
Curing values
Maximum gap width (mm) 0.43
Steel hand strength (sec.) 5-10
Rubber's hand strength (sec.) 5-10
Hand strength of phenol (seconds) 5-10
Mechanical properties
Hardness (Shore D) 85
Shear strength ISO 4587 in N/mm²
Steel 20-22
Thermal properties
Storage temperature (°C) 2-7
Keywords
Keywords
High viscosity Medical ISO 10993-5 Cytotoxicity USP CLASS VI PERMABOND Cyanoacrylate Adhesive Medical Adhesive

Documents and datasheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: