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3M Fire Barrier Sealants


Advanced Firestop Protection

High-performance firestop sealants engineered to help prevent the spread of fire, smoke, and water through penetrations and joints. 3M™ Fire Barrier Sealants offer superior adhesion, flexibility, durability, and reliable protection for industrial, commercial, and construction applications.

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3M™ Fire Barrier CP 25WB+ Sealant

3M™ most popular firestop sealant approved up to 4-hours when used with most plastic and metal pipes

Here are the key features and primary uses for the 3M™ Fire Barrier CP 25WB+ Sealant.

  • High-Performance Protection: This is 3M’s most popular firestop sealant, providing up to 4 hours of fire protection.

  • Intumescent Technology: The material is intumescent, meaning it expands when heated to create a tight seal around items consumed by fire.

  • Superior Adhesion: It is designed to bond effectively to a wide range of materials, including concrete, metals, wood, plastic, and cable jacketing.

  • Rigorous Standards: The product is tested and approved according to Australian standard AS1530.4 and international standard EN1366.

Primary Uses

  • Pipe Penetrations: It is approved for use with most plastic and metal pipes.

  • Firestopping: Specifically engineered to seal penetrations in fire-rated wall and floor assemblies to prevent the spread of fire, smoke, and toxic gases.


3M Fire Barrier Sealant CP25WB+
3M Fire Barrier Sealant IC 15WB+


3M™ Fire Barrier IC 15WB+ Sealant

3M™ Fire Barrier IC 15WB+ is a general-purpose intumescent sealant that provides up to 4 hours of fire protection for plastic pipes, metal pipes, and cables in commercial construction.

  • Up to 4-Hour Fire Protection: High-performance rating approved for fire-stop configurations up to 4 hours.

  • Global Testing Compliance: Extensively tested and compliant with Australian (AS1530.4), International (EN 1366), and American (ASTM E814 / UL Listed) standards.

  • Intumescent Technology: Formulated to expand rapidly when exposed to heat, tightly sealing gaps left by burned or melted items.

  • Superior Material Adhesion: Bonds exceptionally well to a wide range of surfaces including concrete, metals, wood, plastic, and cable jacketing.

  • CPVC Compatible: Formulated to be chemically safe for use with CPVC piping components.

Primary Uses

  • Through-Penetration Firestopping: Ideal for sealing blanks and gaps around both plastic and metal pipe penetrations in fire-rated walls and floors.

  • Cable & Joint Protection: Used to safeguard cable bundles and structural joints against the spread of flame, smoke, and toxic fumes.

  • General-Purpose Commercial Construction: A cost-effective, versatile fire barrier sealant for everyday use across concrete, wood, and metal framing projects.




3M Fire Barrier Water Tight Sealant 1000NS

3M™ Fire Barrier Water Tight Sealant 1000 NS

3M™ Fire Barrier Watertight Sealants (1000 NS & 1003 SL) are ready-to-use, single-component silicone sealants designed to form a flexible, high-performance firestop.

  • Dual Fire & Water Barrier: Provides up to 3 hours of fire protection while meeting UL Water Leakage Test (W-Rating, Class 1) requirements.

  • High Flexibility: Features a $\pm 31\%$ compression and extension capability to accommodate structural movement.

  • Excellent Adhesion & Weatherability: Bonds strongly to most construction materials and offers outstanding resistance to weather once cured.

  • User-Friendly Application: Halogen-free, low-VOC formula applied easily with conventional caulking equipment; paintable with a primer.

  • Acoustic Insulation: Helps minimize sound transfer between rooms to maintain STC ratings.

Primary Uses

  • Watertight Firestopping: Ideal for sealing through-penetrations and construction joints where water ingress, moisture, or high humidity is a concern.

  • Dynamic Joint Systems: Perfect for sealing expansion and construction joints subject to movement and settling.

  • Multi-Service Penetrations: Used around cables, pipes, and conduits in fire-rated walls, floors, and concrete decks.






3M™ Fire Barrier Watertight Silicone 3000 WT Sealant

The 3M™ Fire Barrier 3000 WT is a high-performance, intumescent silicone sealant that provides a dual barrier against fire and water intrusion. It seals through-penetrations to prevent the spread of fire, smoke, and toxic gases while effectively blocking moisture and water migration.

  • 4-Hour Fire Protection: Firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479).

  • Class 1 Water Tightness: Meets UL Water Leakage Test (W Rating, Class 1 requirements) to stop moisture migration.

  • Sound Barrier: Minimizes noise transfer with an STC-rating of 53 in STC 54-rated wall assemblies.

  • All-Weather Durability: Formulated with excellent weathering properties, making it ideal for fast-track construction.

  • Easy Application: Provides excellent bonding and applies smoothly with a standard caulking gun or pneumatic pump.

  • Distinct Appearance: Available in a gray color with black flecks for easy identification.

Primary Uses

  • Water-Prone Through-Penetrations: Sealing gaps around pipes and conduits in areas highly exposed to water, dampness, or moisture.

  • Fire & Smoke Isolation: Blocking fire, toxic gases, and smoke from traveling between floors or rooms.

  • Acoustic Soundproofing: Reducing room-to-room noise transmission in noise-sensitive wall and floor assemblies.





3M Fire Barrier Water Tight Sealant 3000WT

3M™ Fire Barrier Water Tight Sealant 1003 SL

3M™ Fire Barrier Water Tight Sealant 1003 SL is a self-leveling floor silicone that acts as a powerful 2-in-1 shield. It provides up to 3 hours of certified fire and smoke protection while creating a completely waterproof barrier. The self-leveling formula automatically flows flat into gaps, saving time and eliminating the need for hand-tooling.

  • 2-in-1 Protection: Combines a 3-hour certified fire and smoke rating with a completely waterproof barrier.

  • UL Class 1 Watertight Rating: Effectively seals out liquid spills and water leaks to protect lower levels and equipment.

  • Self-Leveling Formula: Automatically flows flat into gaps when poured or pumped, requiring zero hand-tooling.

  • Highly Flexible: Moves dynamically with the building, compressing or stretching up to 31% without tearing.

  • Acoustic Barrier: Dampens sound transmission between floors for a quieter working environment.

Primary Uses

  • Watertight Floor Sealing: Waterproofs concrete floor joints to prevent liquid migration between building stories.

  • Floor Penetrations: Fills gaps around pipes, cables, conduits, and plumbing lines passing through fire-rated floors.

  • Moving Construction Joints: Seals horizontal gaps between shifting concrete slabs subject to thermal expansion.

  • Perimeter Voids & Curtain Walls: Blocks horizontal gaps where floors meet exterior building walls to stop rising fire and water.

  • Blank Floor Openings: Temporarily or permanently seals abandoned voids, allowing easy re-entry for future wiring changes.


3M Fire Barrier Water Tight Sealant 1003 SL

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