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3M 2000+ Silicone Fire Caulk 4.5 gal

Brand: 3M Mfg#: 98040053005
Product#: 479MF20005
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Elastomeric, ready-to-use, single-component, neutral-cure silicone sealant that cures upon exposure to atmospheric humidity to form a flexible firestop seal that also acts as a barrier to airborne sound transmission.


  • Excellent weatherability during construction
  • Fire resistance tested up to 4 hr for construction joint systems in accordance with ASTM E 1966 (UL 2079)
  • Applied with conventional caulking equipment (excellent caulk rate)
  • FGG/BM system CPVC compatible
  • Firestop tested up to 3 hr in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115
  • Excellent adhesion
  • Re-enterable/repairable
  • Compression/extension capability of +/- 13%


  • Brand: 3M
  • Color: Light Gray
  • VOC: Lesser than 31 g/l
  • Standards: ASTM Specified, RoHS Compliant, UL Listed
  • Specific Gravity: 1.34
  • Container Type: Pail
  • Physical Form: Paste
  • Odor/Scent: Alcoholic
  • Temperature Range: -29 TO 50 deg C
  • Hardness: 40