3M™ Polyurethane Adhesive Sealant 550
Fast-curing, flexible bonding and sealing for demanding industrial applications. 3M™ Polyurethane Adhesive Sealant 550 is a black, one-component, moisture-curing polyurethane sealant that forms permanent elastic bonds on a wide variety of similar and dissimilar materials.
This 20.28 fl oz, 599.8 mL sausage pack provides strong adhesion to concrete, wood, aluminum, lacquered metals, polyester, glass, stone, plastics and fiberglass-reinforced materials. The elastic formula helps seal against moisture while accommodating movement, vibration and temperature changes.
Black polyurethane 600 mL sausage pack Tack-free in approximately 1 hour 12 packs per case
Product Benefits
Permanent elastic bonds
The polyurethane formula forms a flexible bond that helps accommodate movement, vibration, expansion and contraction.
Bonds dissimilar materials
Provides excellent adhesion to many combinations of concrete, wood, metal, glass, stone, plastics and fiberglass.
Fast set and cure
Forms a tack-free surface in approximately one hour, helping keep installation and production work moving.
Single-component formula
Ready to apply without mixing, measuring or guesswork. The moisture-curing formula simplifies application.
Paintable after curing
Can be painted after curing for a cleaner, more finished appearance when the selected coating is compatible.
Helps seal against moisture
Suitable for sealing, caulking, waterproofing and vibration-damping applications in construction, transportation and industrial environments.
Recommended Applications
3M™ Polyurethane Adhesive Sealant 550 is designed for bonding and sealing applications where flexibility, adhesion and environmental resistance are important, including:
- Bonding and sealing concrete, wood, aluminum, steel and coated metals
- Bonding glass, stone, polyester, plastics and fiberglass-reinforced materials
- Door and window frame perimeter sealing
- Aluminum curtain wall and storefront applications
- Vertical and horizontal expansion joints
- Concrete and masonry control joints
- Marine deck-to-hull bonding and sealing applications
- Transportation, vehicle and trailer assembly
- General industrial bonding, caulking and waterproofing
- Vibration damping and flexible component attachment
Applicator requirement
This product is supplied in a 600 mL sausage pack. Use a compatible sausage-pack hand or pneumatic applicator designed for 600 mL packs. It is not intended for use in a standard 310 mL cartridge applicator.
Surface preparation
Surfaces should be clean, dry and free from oil, grease, dust, loose material and other contaminants. For the best results, test the complete application on representative materials before production use.
Polyurethane sealants may require primers or additional preparation on certain substrates. Follow the applicable 3M technical documentation and project requirements.
Technical Specifications Hide details
| Specification |
Details |
| Product |
3M™ Polyurethane Adhesive Sealant 550 |
| Product colour |
Black |
| Adhesive type |
Polyurethane |
| Cure type |
One-component, moisture curing |
| Product form |
Sausage pack |
| Container size |
599.8 mL / 20.28 fl oz |
| Application method |
Hand or pressure caulk applicator |
| Tack-free time |
Approximately 1 hour |
| Full cure time |
Greater than 4 mm per 24 hours |
| Hardness |
45 Shore A |
| Tensile strength |
300 psi |
| Modulus at 100% |
150 psi |
| Solids by weight |
Approximately 90% |
| Heat resistance |
Up to 175°F |
| Industries |
Construction, transportation and general industrial |
| Case quantity |
12 packs per case |
| Shelf life |
456 days |
| 3M Catalogue Number |
550-600-BLK |
| 3M Stock Number |
7000121479 |
| UPC |
00048011627977 |
| Country of origin |
France |
Cure time and final performance depend on bead size, temperature, humidity, substrate condition and application design. The listed values are typical manufacturer data and should not replace project-specific testing.
Use and Handling Notes
- Apply to clean, dry and properly prepared surfaces.
- Use a compatible 600 mL sausage-pack applicator.
- Allow adequate curing time before exposing the bond or seal to service loads, water or movement.
- Paint only after the sealant has cured sufficiently and compatibility with the selected coating has been confirmed.
- For load-bearing, safety-critical or highly specialized applications, validate the complete assembly and follow 3M technical guidance.
3M is a trademark of 3M Company. This product is intended for industrial and occupational applications.
