Permabond PT321 Polyurethane Adhesive 50ml 2-Part - Case of 25 (PT003210050C0101)
Permabond PT321 Polyurethane Adhesive 50ml 2-Part - Case of 25 (PT003210050C0101)
Permabond PT321 is a two-part polyurethane adhesive for industrial bonding of metals, plastics and composites. It cures at room temperature, uses a 1:1 mix ratio by volume and has thixotropic, non-slump rheology. Permabond identifies good resistance to impact and vibration as a benefit. Its short 60–90-second pot life makes advance surface preparation and efficient assembly important.
This listing: case of 25 × 50ml cartridges, part PT003210050C0101. Compatible dispensing equipment and a static mixer are required; confirm accessory supply and compatibility before ordering.
Best Uses / Applications
- Industrial metal bonding with application-specific surface preparation.
- Plastic and composite assemblies after substrate compatibility testing.
- Joints where impact and vibration resistance are important.
- Prepared assemblies suited to a short pot life and rapid positioning.
- Non-slump adhesive application within the manufacturer's 5mm maximum gap-fill guidance.
Technical Specifications
| Product | Permabond PT321 |
|---|---|
| Listing Part Number | PT003210050C0101 |
| Packaging | 25 × 50ml cartridges |
| Adhesive Type | Two-part polyurethane |
| Mix Ratio | 1:1 by volume |
| Pot Life | 60–90 seconds, typical manufacturer value |
| Handling Time on Steel | 10–15 minutes to 0.3 N/mm² shear strength, ISO 4587 |
| Full Cure | 24 hours at 23°C; 30 minutes at 90°C, per manufacturer |
| Maximum Gap Fill | 5mm / 0.2 in |
| Component Appearance | Part A: black; Part B: cream. Mixed color not specified in the linked sheet. |
| Viscosity at 25°C | A: 4,000–8,000 mPa·s; B: 3,000–6,000 mPa·s; thixotropic |
| Steel Shear Strength | 18–25 MPa, ISO 4587 |
| Zinc / Carbon Fibre Shear Strength | 6–8 MPa, ISO 4587 |
| Tensile Strength | 20–25 MPa, ISO 37 |
| Elongation at Break | Less than 10%, ISO 37 |
| Hardness | 70–80 Shore D, ISO 868 |
| Storage Temperature | 5–25°C / 41–77°F |
| Temperature Guidance | Minimum cured-adhesive exposure temperature: −40°C, depending on bonded materials. Evaluate elevated-temperature strength using the TDS and actual joint conditions. |
These are typical guideline values from the linked PT321 Global TDS Revision 10, not guaranteed production specifications. Strength depends on surface preparation and bond gap. Confirm current requirements with Permabond for critical applications.
Key Features
- 1:1 volume mixing for two-component dispensing.
- Room-temperature cure.
- Thixotropic, non-slump application characteristics.
- Manufacturer-described impact and vibration resistance.
- Broad material applicability, subject to testing.
- Case quantity for industrial adhesive supply.
Preparation and Use
- Prepare clean, dry, grease-free surfaces. Permabond recommends Cleaner A for most surfaces; some metals benefit from light abrasion to remove oxide.
- If separation has occurred, shake the cartridge or stir bulk material as directed by the manufacturer.
- Use compatible 1:1 dispensing equipment and apply adhesive pre-mixed through a static mixer nozzle.
- Assemble and clamp within the short pot life. Maintain pressure until handling strength is reached.
- Allow the specified full cure before loading the joint. Validate any heated cure against the materials and process.
PT321 is for professional or industrial use only. It is not recommended in contact with strong oxidizing materials and may affect some thermoplastics. Check compatibility and consult the Safety Data Sheet for handling precautions.
Selection Comparison
| Selection Factor | PT321 | When to Evaluate Another Grade |
|---|---|---|
| Assembly window | 60–90-second pot life | Long positioning or adjustment time required |
| Cured properties | 70–80 Shore D; less than 10% elongation | Soft, highly extensible or elastomeric bond required |
| Substrates | Metals, plastics and composites, with testing | Thermoplastics or exposure conditions fail compatibility tests |
| Bond gap | Up to 5mm manufacturer guidance | Larger gap or different joint geometry |
Frequently Asked Questions
What is the correct mix ratio?
The linked Permabond PT321 sheet specifies 1:1 by volume. Use equipment compatible with the cartridge and this ratio.
How long do I have to assemble parts?
The sheet lists a typical pot life of 60–90 seconds, not 30 minutes. Prepare surfaces and positioning before dispensing, and validate timing for your process.
When does the joint reach handling strength?
Typical handling time on steel is 10–15 minutes to 0.3 N/mm² shear strength. Handling strength is not full cure.
What is the full cure time?
The sheet lists 24 hours at 23°C or 30 minutes at 90°C. Use a validated cure schedule compatible with your substrates.
Is PT321 a soft, flexible adhesive?
The sheet lists 70–80 Shore D hardness and less than 10% elongation at break. Impact and vibration resistance should not be confused with a soft, highly flexible cured material.
What materials can it bond?
Permabond identifies metals, plastics and composites. Test actual substrates and surface preparation; some thermoplastics may be affected.
Is a static mixer included?
A compatible static mixer is required. Accessory inclusion for this case listing needs confirmation; contact MTE Solutions before ordering if you require mixers or dispensing equipment.
What does this listing contain?
The catalog configuration is a case of 25 × 50ml cartridges, part PT003210050C0101. Confirm accessory requirements separately.
How should PT321 be stored?
The sheet specifies 5–25°C. If component separation occurs, follow its shake/stir guidance. Follow product labels and current safety instructions.
