3M PU550

Model

Series

Fire Sealant

Product Description

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