3M Fire Barrier Moldable Putty Stix MP+ is a one-part, re-enterable, intumescent putty that can be easily formed to firestop through penetrations and blank openings in fire-rated assemblies. We formulated this dark red, easily moldable putty stick to provide up to 4 hours of fire protection. These putty stix also produce a draft and cold smoke seal and help reduce noise transfer.

• Firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479) & CAN/ULC S115
• Putty provides draft and cold smoke seal
• Pliable and conformable design easily molds into required shapes
• Helps reduce noise transfer (STC-rating of 56 when tested in STC 56-rated wall assembly)
• Will not dry out or crumble for a re-enterable and repairable solution
• Excellent adhesion and aging properties provide a long-term performance
• Noncorrosive to metal and compatible with synthetic cable jackets
• Low VOC, halogen-free and solvent-free formula for safe working environment with minimal odor
• Sold as one-stick