3M Polyurethane Adhesive Sealant 550
3M Polyurethane Adhesive Sealant 550 is a single component polyurethane-based sealant. Polymerization is very quick and the compound remains permanently elastic and waterproof after curing. Unlike Silicone Sealants, 3M Polyurethane Adhesive Sealant 550 can be painted over. It is good for jointing and bonding in metal constructions and floor-joints, especially those subjected to heavy traffic. The cured compound has excellent resistance to chemicals and mineral oils.
Typical Properties
| Colors | White, Gray |
| Tack-Free Time @ 23oC/50% RH. | 60 minutes |
| Rate of Cure @ 23oC/50% RH. | 4mm per 24 hours |
| Shore A Hardness (ASTM C661) | 45 |
| Tensile Strength (ASTM D412) | 2.09 N/mm² |
| Service Temperature | -40°C to + 90°C |
| Specific Gravity | 1.16 – 1.18 |
| Solids Content | >90% |
| Consistency | Medium paste |
| Flash Point | 58°C |
| Shrinkage | 5% approx. |
| Coverage Approximate (10.5oz) | 3.2mm bead = 305mm |
| VOC’s | 112 gms/liter |
| Shelf Life | 6 months from date of shipment |
