Silicones, silicone oils, sprays
Casting and potting resins
Internal reference:
49-321.KT.ML050
HS code:
59119000000
Technical Data
Typical values, not a specification. The technical data sheet (TDS) is binding.
Product Information
- Brand
- Permabond
- Manufacturer
- Permabond Engineering Adhesives Ltd
- Container
- 50 ml
- Mixing Ratio
- 1:1
- Working time (pot life) at 25°C
- 60-90 seconds
- Country of origin
- Italy
Physical Properties A
- Chemical Group (A)
- Polyurethane
- 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 Full Cure
- Tensile strength (ISO37)
- 20-25 MPa
- Elongation at break (elasticity) (ISO37)
- <10%
Bonding Properties
- Final strength at 23°C
- 24 hours
Physical Properties
- Color
- Cream
Curing values
- Hand 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
Features
- Gap fill up to
- 5 mm
- Final strength at 90°C
- 30 minutes
Product Description
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.
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.
What distinguishes PT321
What is PT321 used for?
Processing
Recommended accessories
PT321 in comparison
Direct comparison with related Permabond products from our range.
PT321 Current Product |
MT 3836 → | MT382 → | MT3821 → | |
|---|---|---|---|---|
| Chemical Base | 2K Polyurethane | 2K hybrid silane polymer | 2K modified epoxy | 2K modified epoxy (flexible) |
| Viscosity | pasteus | paste-like | self-leveling | thixotropic |
| Grade | Industrial | Industrial / UL 94 V-0 | Industrial | Industrial |
| Color | see TDS | see TDS | see TDS | black |
| Set Time | Seconds pot life | min. | min. | min. |
| Full Cure | 24 h RT | 24–48 h RT | 24 h RT | 24 h RT |
| Main application | High-throughput structural adhesive | Fire protection + thermal conductivity | Engineering plastics + potting | Flexible adhesive, black |
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, 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).