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Thermal protection product for offshore and marine application, fire sealant, Fire stop system, Gasket and System, Duck system and more
Name

3M PU550

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

ColorsWhite, 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 Gravity1.16 – 1.18
Solids Content>90%
ConsistencyMedium paste
Flash Point58°C
Shrinkage5% approx.
Coverage Approximate (10.5oz)3.2mm bead = 305mm
VOC’s112 gms/liter
Shelf Life6 months from date of shipment