Hilti FS-ONE MAX Firestop Sealant / Fire Caulk – 10.1 oz Cartridge

 Hilti FS-ONE MAX is a high-performance intumescent firestop sealant, commonly referred to as fire caulk or firestop caulk, designed to help protect common through-penetrations in fire-rated wall and floor assemblies.

Not sure how firestop sealants are used? Read our Fire Caulk & Firestop Sealant Guide.

Is Hilti FS-ONE MAX Fire Caulk?

Hilti FS-ONE MAX is an intumescent firestop sealant commonly referred to as fire caulk or firestop caulk. It is designed for use in approved fire-rated penetration systems involving pipes, cables and other through-penetrations.

Designed for use with concrete, masonry and drywall, FS-ONE MAX provides contractors with a versatile firestopping solution for pipe, cable and mixed penetrations. Always select and install firestop materials according to the applicable tested and approved firestop system.

Common Applications

• Copper, steel and EMT pipe penetrations
• Insulated steel and copper pipe penetrations
• Closed or vented plastic pipe penetrations
• Single cables and cable bundles
• Cable trays
• Mixed and multiple penetrations
• Concrete, masonry and drywall assemblies

Key Features

• Intumescent firestop sealant — expands when exposed to fire
• Up to 4-hour fire rating in applicable tested systems
• Water-based and paintable
• Red color
• Mold and mildew resistant
• Chemical resistant
• FBC compatible
• LEED v4 compliant
• Made in the USA / Buy American compliant

Technical Specifications

• Product: Hilti FS-ONE MAX
• Type: Intumescent firestop sealant
• Chemical basis: Water-based acrylic dispersion
• Color: Red
• Application temperature: 35°F–104°F*
• Temperature resistance: -4°F–212°F
• Tack-free time: Approximately 20 minutes at specified reference conditions
• Shelf life: 18 months
• Expansion ratio: Up to 1:5 unrestricted
• Paintable: Yes
• LEED VOC input: 9 g/L
• Test standards include: UL 1479, ASTM E814, ASTM E84 and CAN/ULC-S115

*Hilti provides additional requirements for applications below 35°F; consult the current technical documentation and applicable listed system before installation.

Important Firestop Installation Information

Firestop performance depends on the complete tested system, including the assembly, penetration type, annular space, backing material, sealant depth and other installation requirements.

Consult Hilti's current technical literature and the applicable UL-listed or approved firestop system for the specific penetration before installation.

Download (PDF) Product Data Sheet

Download (PDF) Instruction for Use