Skip to content
Website 0 CHF
  1. All Products
  2. PERMABOND 4C40
PERMABOND 4C40

PERMABOND 4C40

https://www.silitech.ch/web/image/product.template/2234/image_1920?unique=8ac25b8

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

Price on request

  • Brand
  • Manufacturer
  • Container
  • Chemical group
  • Viscosity at 25°C
  • Specific Gravity
  • Maximum gap fill (mm)
  • Fixture time on steel (sec.)
  • Hand Strength Rubber (sec.)
  • Hand Strength Phenol (sec.)
  • Curing time at 23°C
  • Steel
  • Impact strength (ASTM D-950)
  • Dielectric Constant
  • Hardness (Shore D)
  • Storage Temperature (°C)
  • Viscosity (adhesives)

This combination does not exist.

Contact us
High Viscosity Medical ISO 10993-5 Cytotoxicity USP CLASS VI PERMABOND Cyanoacrylate Adhesive Medical Adhesive Range Review 2026

 
General Terms and Conditions

Shipping usually within 1 to 3 business days
(Availability confirmed after order)

Express logistics. Fast and reliable within Switzerland & Europe

From Swiss stock Dispatch within 24h Batch certificate Invoice 30 days (B2B) Technical advice
Shipping & Delivery

Usually 1 to 3 business days

Availability is confirmed after order receipt.

Express logistics within Switzerland & Europe.

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 plastics
Hard-to-bond polymers.
Multi-material assembly
Metals, plastics, and elastomers combined.
Data Sheets & Safety Data Sheet
TDS and SDS in multiple languages — view 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, allow to dry briefly — otherwise no CA adhesion is possible.
3
Activator CSA (if needed)
For porous or difficult substrates: spray CSA aerosol, let it evaporate — accelerates CA curing.
4
Apply cyanoacrylate sparingly
Apply a drop or thin bead to one bonding surface — not to both sides, otherwise reaction is too fast.
5
Joining + pressing
Join components immediately and correctly aligned, press with defined pressure — adhesive spreads into a thin film.
6
Curing
Tack-free time in seconds to minutes depending on substrate. Full strength after 24 h. Medical device compliance after full cure.

Recommended accessories

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

4C40 in comparison

Direct comparison with related Permabond products from our range.

4C40
Current Product		 4C30 →4C10 →4UV80HV →
Chemical BaseCyanoacrylate (ethyl ester)Cyanoacrylate (ethyl ester)Cyanoacrylate (ethyl ester)Methacrylate ester
Viscosityhigh viscosityMedium Viscositylow viscosityhigh viscosity, opaque
GradeMedical DeviceMedical DeviceMedical DeviceMedical Device (ISO 10993-5)
Colorcolorlesscolorlesscolorlessopaque
Set Time~60 s~30 s<10 s (typical)UV Cure (sec.)
Full Cure24 h24 h24 hUV-cured
Main applicationLarge gap + POMAuto-dispenser, middle columnHard-to-bond rubbersUV Medical Device
Topics & Application Fields
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 Range Review 2026

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 Full Cure
Impact strength (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 fill (mm) 0.43
Fixture time on steel (sec.) 5-10
Hand Strength Rubber (sec.) 5-10
Hand Strength Phenol (sec.) 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

Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.

Documents and data sheets

Click on a document for the preview or the download icon for 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 elevated purity standards for medical applications — typically ISO-10993 tests (biocompatibility, cytotoxicity). They have the same instant-curing chemistry as standard CAs (cross-linking via 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, exact values see TDS. Consult the Safety Data Sheet (SDS) before use. Observe the expiry date on the packaging. Store cyanoacrylates cool (ideally refrigerated) for maximum shelf life.

In the comparison table above, you will find related Permabond products with different properties — viscosity, mixing ratio, special certification. If you are unsure about the optimal choice, we will be happy to advise you — contact SILITECH with your specific application (substrate pairing, load, curing condition).

Your question not covered?

Our technical team provides personal advice on material selection, processing questions, and individual requirements. Fast and competent.

Submit inquiry Request sample

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 Full Cure
Impact strength (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 fill (mm) 0.43
Fixture time on steel (sec.) 5-10
Hand Strength Rubber (sec.) 5-10
Hand Strength Phenol (sec.) 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 Range Review 2026

Documents and data sheets

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