# 3M Fire Barrier Sealant CP 25WB+ Red Cartridge 10.1 fl oz (286 g) | Intumescent Firestop Sealant for Through-Penetrations **Brand:** 3M **SKU:** cmk0408 **ASIN:** B08SQ5TG92 **Canonical URL:** https://crowcrowcrow.com/p/3m-fire-barrier-sealant-25wb-commercial-industrial-residential-applications-cartridge-red/cmk0408 **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹21,104 **Discount:** 34% **Customer rating:** 4.88/5 from 8 ratings ## Description 3M Fire Barrier Sealant CP 25WB+ (286 g / 10.1 fl oz) is a red, intumescent sealant for firestop applications. It expands up to 3x its volume, providing up to 4 hours of fire resistance for penetrations in fire-rated assemblies. Imported from authorized US retailers, duties included, arrives via ExpressBox tracked delivery within 13-15 days. ## Highlights - Up to 4-Hour Fire Rating — Provides a critical firestop seal for penetrations in fire-rated walls and floors, helping to prevent fire spread and maintain building safety for up to 4 hours as per UL listings. - Expands 3x Volume Under Heat — Intumescent properties allow the sealant to expand significantly when exposed to temperatures above 1000°F (538°C), maintaining seal integrity during a fire event. - Strong Adhesion & Sag Resistance — Engineered for excellent adhesion to a wide range of construction substrates and penetrants, with a sag-resistant formula that stays in place during application. - Easy Application & Re-entry — Water-based, gun-grade sealant requires no mixing, applies easily, and is paintable, re-enterable, and repairable for simplified installation and maintenance. ## Key features - BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through - HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C) - ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings - VARIETY OF APPLICATIONS - HVAC ducts and vents, pipes, blank openings, cables, through-penetrations, busways, combos, rated wall, floor and floor-ceiling assemblies and more - EASY AND CLEAN APPLICATION – with no mixing required and sag-resistant properties, it is simple to apply and doesn’t make a mess ## Why choose this product **Trusted Firestop Performance** — 3M Fire Barrier Sealant CP 25WB+ is a trusted product for firestop applications, designed to meet stringent building code compliance. It helps prevent the spread of fire, smoke, and noxious gases by forming a monolithic seal in through-penetrations. This intumescent sealant expands up to three times its volume when exposed to high temperatures, maintaining seal integrity for up to 4 hours in UL-listed systems. Its sag-resistant, water-based formula adheres strongly to various substrates, ensuring reliable performance in commercial, industrial, and residential settings. Imported from authorized US retailers, this sealant offers authentic performance for critical safety applications. **Ideal for Indian Construction Projects** — This sealant is ideal for sealing gaps around pipes, HVAC ducts, cables, and blank openings in fire-rated walls and floors. Its strong adhesion and sag-resistant properties make it suitable for diverse Indian construction environments. While UL-rated, it's advisable to verify compatibility with local Indian building and fire codes (IS/NBC) for specific projects. The 10.1 fl oz (286 g) cartridges are compatible with standard caulking guns, and the paintable, re-enterable nature simplifies maintenance. For projects requiring robust fire protection, this imported sealant offers a reliable solution. ## How to use 1. Ensure the through-penetration or joint is clean, dry, and free of debris. Remove any loose material that could compromise adhesion. For larger openings, use appropriate backing materials as per the UL system listing. — Prepare the Opening 2. Load the 10.1 fl oz (286 g) cartridge into a standard caulking gun. Apply the sealant evenly, ensuring it completely fills the gap or cavity around the penetrants. Work from the bottom up for vertical applications. — Apply the Sealant 3. Tool the sealant immediately after application to ensure good contact with all surfaces. The sealant is sag-resistant but can be smoothed with a damp tool. Allow to cure as per manufacturer guidelines before painting or re-entering the area. — Tool and Finish ## Product details | Field | Value | |---|---| | Base Type | Latex-based | | Intumescent | Yes | | Halogen-Free | Yes | | Sound Transmission STC Rating | STC 54 (in STC 54-rated wall assembly) | | Expansion Ratio | Minimum 3x volume above 1000°F (538°C) | | Allergens | Not specified | | Application | Through-penetration firestop for pipes, HVAC ducts, cables, blank openings in fire-rated assemblies | | Application Method | Standard caulking gun | | Cure Time | Not specified | | Paintable | Yes | | Re-enterable/Repairable | Yes | | Shelf Life After Opening | Not specified | | Cost per cartridge | ₹21,104 per cartridge | | Brand | 3M | | Model Number | CP-25WB+ | | Color | Red | | Item Form | Liquid | | Material | Silicone | | Size | 10.1 fl oz (286 g) cartridge | | Pack Size | Pack of 12 cartridges | | Weight per cartridge | 10.1 oz (286 g) | | Total Package Weight | 5.602 kg | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | ## Attributes - **Item form:** Liquid ## Frequently asked questions ### How to buy an original 3M Fire Barrier Sealant CP 25WB+ in India? Purchase this 3M Fire Barrier Sealant CP 25WB+ from crowcrowcrow.com. It is sourced from authorized US retailers, factory-sealed, and imported per-order. All customs duties and GST are included in the listed price, and it ships via ExpressBox tracked delivery within 13-15 days. ### Is this fire barrier caulk suitable for sealing gaps around pipes and cables? Yes, this fire barrier caulk is designed for through-penetration firestop applications, including sealing gaps where pipes, conduits, and cables pass through fire-rated walls and floors. It offers up to a 4-hour fire rating and expands to maintain a seal. ### Can I apply this with a standard caulking gun and paint over it? Yes, this sealant is supplied in standard 10.1 fl oz (286 g) cartridges compatible with a common caulking gun. It is also paintable once cured, allowing for aesthetic integration into your construction project. ### What is the fire resistance rating of this sealant? This 3M Fire Barrier Sealant CP 25WB+ is listed in hundreds of UL Firestop systems and is capable of providing up to a 4-hour fire rating for penetrations in fire-rated assemblies. ### Does this sealant expand under heat? Yes, this is an intumescent sealant. It is capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C), helping to maintain a firestop seal. ### What substrates does this sealant adhere to? This sealant is engineered to exhibit strong adhesion to a full range of construction substrates and penetrants, including common building materials used in fire-rated assemblies. ### Is this sealant safe for use in residential applications? Yes, this 3M Fire Barrier Sealant CP 25WB+ is suitable for commercial, industrial, and residential applications, helping to prevent the spread of fire, smoke, and gases. ## Compliance No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging. ## Images 1. https://images.crowcrowcrow.com/B08SQ5TG92-2.webp 2. https://images.crowcrowcrow.com/B08SQ5TG92-5.webp 3. https://images.crowcrowcrow.com/B08SQ5TG92-8.webp 4. https://images.crowcrowcrow.com/B08SQ5TG92-11.webp 5. https://images.crowcrowcrow.com/B08SQ5TG92-14.webp --- Source: https://crowcrowcrow.com/p/3m-fire-barrier-sealant-25wb-commercial-industrial-residential-applications-cartridge-red/cmk0408 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 13-15 days. Prices are all-inclusive (duties + GST).