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PERMABOND PT321

PERMABOND PT321

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2K polyurethane adhesive for gap filling up to 5 mm.

2-component polyurethane adhesive for gap filling up to 5 mm — pot life in seconds for high throughput, dual cartridge processing with static mixer, room temperature curing

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  • Manufacturer
  • Container
  • Chemical group (A)
  • Chemical group (B)
  • Color (A)
  • Color
  • Viscosity (B)
  • Specific gravity (A)
  • Specific gravity (B)
  • Mixing ratio
  • Gap filling up to
  • Processing time (pot life) at 25°C
  • Handling strength at 23°C
  • Final strength at 23°C
  • Final strength at 90°C
  • zinc
  • Steel
  • CFRP
  • Tensile strength (ISO37)
  • Elongation at break (elasticity) (ISO37)
  • Hardness (Shore D)
  • coefficient of thermal expansion
  • Country of origin

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Metal, plastic, composite materials

 
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: 49-321.KT.G050

HS code: 59119000000

Internal reference: 49-321.KT.G050
HS code: 59119000000

PERMABOND PT321
PERMABOND PT321
Permabond · Permabond Engineering Adhesives Ltd · SKU 49-321.KT.G050

Permabond PT321 is a 2-component polyurethane adhesive for gap filling up to 5 mm — with a pot life of seconds for high throughput, dual cartridge processing with static mixer, and room temperature curing.

Permabond two-component polyurethane adhesives — fast-curing, good gap-filling, excellent for structural bonding and potting. PT321 is tailored to specific applications — the most important properties and areas of use are listed below.

Gap filling 5 mm + seconds pot life

Permabond PT321 is a two-component polyurethane adhesive for high-throughput applications — gap filling up to 5 mm, pot life in seconds with static mixer dosing. Cures at room temperature, curing can be accelerated with heat.

PT321 in numbers
2K-PU
Structural adhesive
5 mm
Gap filling
Sec.
Potting time
Double cartridge
Static mixer

What distinguishes PT321

Gap filling up to 5 mm
Compensation for tolerances in large adhesive gaps.
Seconds pot time
High-throughput processing with static mixer.
Dual cartridge system
Suitable for machine conveying, precise dosing.
Excellent adhesion
Wide range of substrates.
Room temperature curing
Can be accelerated with heat.
Also available in bulk containers
Economical for industrial production.

What is PT321 used for?

High-throughput industrial bonding
Mass production with pot life measured in seconds.
Large gap filling
Up to 5 mm gap width.
Structural bonding
High-strength connections.
Machine processing
Dual cartridge system.
Potting application
High-strength encapsulation.
Composite structural bonding
GRP/CFRP connections.
Data sheets & safety data sheet
TDS and SDS in multiple languages ​​— watch or download directly.
To the documents →

processing

1
clean substrate
Degrease and dry the bonding surfaces — PU is sensitive to moisture.
2
Primer (if needed)
Permabond 2-K Primer Kit for demanding substrates.
3
Insert double cartridge
With static mixer nozzle in gun or machine — pot life is very short (seconds for PT321).
4
Apply
Apply within the pot life — work very quickly or process mechanically.
5
assembling components
Press immediately and precisely — gap filling up to 5 mm possible.
6
Curing
Full crosslinking takes 24 hours at room temperature. Can be accelerated with heat.

Recommended accessories

Permabond 2-K Primer Kit
Universal primer kit with wettability indicator — for metal, glass, plastic, and composite materials.
View product →
Permabond Cleaner A Aerosol
Universal industrial cleaner as a spray — standard preparation before Permabond bonding.
View product →
Permabond MT 3836
2K hybrid silane polymer — UL 94 V-0 fire protection + thermally conductive adhesive.
View product →

PT321 in comparison

Direct comparison with related Permabond products in our range.

PT321
Current product		 MT 3836 →MT382 →MT3821 →
Chemical basis2K polyurethane2K Hybrid Silane Polymer2K modified epoxy2K modified epoxy (flexible)
viscositypasteuspastyself-levelingthixotropic
GradeIndustrialIndustrial / UL 94 V-0IndustrialIndustrial
Colorsee TDSsee TDSsee TDSblack
SetTimeseconds pot timemin.min.min.
Full Cure24 h RT24–48 h RT24 h RT24 h RT
Main applicationHigh-throughput structural adhesiveFire protection + heat conductivityEngineering plastics + pottingFlexible adhesive, black
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Metal, plastic, composite materials

Technical data for PERMABOND PT321

All 24 product information 6 Physical properties A 3 Physical properties B 3 Performance at final strength 2 Bonding properties 1 Physical properties 1 Curing values ​​1 Mechanical properties 1 Shear strength ISO 4587 in N/mm² 3 Thermal properties 1 General 2
Product information
brand Permabond
Manufacturer Permabond Engineering Adhesives Ltd
Container 50 ml
Mixing ratio 1:1
Processing time (pot life) at 25°C 60-90 seconds
Country of origin Italy
Physical properties A
Chemical group (A) Polyurethan
Color (A) Black
Specific gravity (A) 1.25
Physical properties B
Chemical group (B) Isocyanate
Viscosity (B) 3000-6000
Specific gravity (B) 1.45
Performance at final strength
Tensile strength (ISO37) 20-25 MPa
Elongation at break (elasticity) (ISO37) <10%
Properties of the adhesive
Final strength at 23°C 24 hours
Physical properties
Color Cream-colored
Curing values
Handling strength at 23°C 10-15 minutes
Mechanical properties
Hardness (Shore D) 70-80
Shear strength ISO 4587 in N/mm²
zinc 6-8
Steel 18-25 MPa
CFRP 6-8 MPa
Thermal properties
coefficient of thermal expansion 85 x 10-6 1/K
Generally
Gap filling up to 5 mm
Final strength at 90°C 30 minutes

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) 4
Permabond PT321 - Technical Data Sheet DE.pdf
313 KB
Permabond PT321 - Technical Data Sheet EN.pdf
317 KB
Permabond PT321 - Fiche Technique FR.pdf
281 KB
Permabond PT321 - Scheda Tecnica IT.pdf
319 KB
Safety Data Sheets (SDS) 3
Permabond PT321 - Safety Data Sheet DE.pdf
345 KB
Permabond PT321 - Safety Data Sheet EN.pdf
341 KB
Permabond PT321 - Fiche de Sécurité FR.pdf
344 KB

Frequently Asked Questions about PT321

Practical application and design questions — answered by SILITECH.

Permabond PT321: 2-component polyurethane adhesive for gap filling up to 5 mm — pot life in seconds for high-throughput applications, dual-cartridge processing with static mixer, room temperature curing. Main applications: High-throughput industrial bonding, large gap filling, structural bonding.

PU adhesives with a pot life of just a few seconds require dual-cartridge processing with a static mixer—manual mixing is not possible. The A and B components are combined in the mixer nozzle only shortly before application. Important: replace the static mixer nozzle after each application, otherwise the adhesive will cure in the nozzle. Machine processing is recommended for high-volume production.

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).

Your question isn't listed here

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
brand Permabond
Manufacturer Permabond Engineering Adhesives Ltd
Container 50 ml
Mixing ratio 1:1
Processing time (pot life) at 25°C 60-90 seconds
Country of origin Italy
Physical properties A
Chemical group (A) Polyurethan
Color (A) Black
Specific gravity (A) 1.25
Physical properties B
Chemical group (B) Isocyanate
Viscosity (B) 3000-6000
Specific gravity (B) 1.45
Performance at final strength
Tensile strength (ISO37) 20-25 MPa
Elongation at break (elasticity) (ISO37) <10%
Properties of the adhesive
Final strength at 23°C 24 hours
Physical properties
Color Cream-colored
Curing values
Handling strength at 23°C 10-15 minutes
Mechanical properties
Hardness (Shore D) 70-80
Shear strength ISO 4587 in N/mm²
zinc 6-8
Steel 18-25 MPa
CFRP 6-8 MPa
Thermal properties
coefficient of thermal expansion 85 x 10-6 1/K
Uncategorized
Gap filling up to 5 mm
Final strength at 90°C 30 minutes
Keywords
Keywords
Metal, plastic, composite materials

Documents and datasheets

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