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Brand: Hilti
Hilti CP 601S Firestop Silicone Sealant (CFS-S SIL)
Description
The Hilti CP 601S (also sold as CFS-S SIL) is a silicone-based firestop sealant for fire-rated joints and pipe penetrations where high movement is expected. Hilti describes it as providing maximum movement in fire-rated joints, and lists expansion or stretched connection joints in fire compartment walls and floors, uninsulated metal pipes through compartment walls and floors, and acoustic insulation of pipes.
Silicone firestop for moving joints and metal pipe penetrations
A silicone sealant is chosen over an acrylic grade where the joint moves in service. The Hilti product page lists masonry, metal, concrete and gypsum as base materials and describes the sealant as smoke-, gas- and water-resistant with good adhesion without primer. It carries a cULus classification mark. Hilti ranks it in its Ultimate product class.
Technical specifications
| Parameter | Specification |
|---|---|
| Product type | Silicone-based firestop sealant (CP 601S / CFS-S SIL) |
| Base materials | Masonry, metal, concrete, gypsum |
| Colours | Grey and white options on the product page |
| Packaging | Cartridge or foil pack; pack size one piece |
| Application temperature | 5 to 40 deg C |
| Approximate curing time | 2 mm in 3 days at 24 deg C and 50 percent relative humidity |
| Applications listed | Expansion or stretched joints in fire compartment walls and floors; uninsulated metal pipe penetrations; acoustic insulation of pipes |
| Classification mark | cULus classified (product page) |
| Appearance (safety data sheet) | Pasty, slight odour |
| Density (safety data sheet) | 1.50 to 1.54 g/cm3 at 23 deg C (ISO 1183-1 A) |
| Storage (safety data sheet) | Keep cool and dry in the original container, 5 to 25 deg C |
| Auto-ignition and decomposition | Auto-ignition above 400 deg C; decomposition above 300 deg C |
| Instruction sheet reference | 24 hours at 23 deg C and 50 percent relative humidity shown for joint and penetration steps |
Use and documentation notes
The Hilti instruction sheet shows pictorial steps for joints and penetrations and refers users to Hilti product literature, third-party published listings and national approvals before handling. Fire resistance ratings depend on the listed assembly, so the joint or penetration must match an approved detail for the wall or floor, the pipe type and the required period. The product page does not list a European Technical Assessment for this sealant, so ask Hilti for the specific listing that applies to the project before relying on it.
Selection and ordering checks
Confirm the base material, joint width and expected movement, whether the pipe is insulated or not, the colour and the cartridge or foil pack format, and compare with the CP 606 acrylic sealant where less movement is expected. The Hilti firestop range also covers collars, wraps, putty, boards and cable transit systems.
Documents and quotation
For a quotation on the CP 601S, send Seven Star LLC the exact model, quantity and delivery point in Oman or elsewhere in the GCC. Seven Star LLC is an independent supplier based in Muscat and does not hold any manufacturer status for Hilti. The Hilti instruction sheet for the CP 601S and the English safety data sheet are attached as manufacturer PDFs; no separate datasheet or ETA is listed on the Hilti page. Current item numbers, pack sizes and availability should be read from the Hilti product page. Related Hilti items sit in the Fire Fighting category.
Datasheets & Documents
Reviews (0)
About brand
Hilti is the Liechtenstein construction technology company for fastening, anchoring, firestop, installation and power tool systems. The brothers Martin and Eugen Hilti opened a small mechanical workshop in Schaan, Liechtenstein, in 1941, and the company turned to fastening technology after Martin Hilti acquired a fastening patent in 1948. Hilti is still headquartered in Schaan and controlled by the Martin Hilti Family Trust, created in 1980.
Seven Star LLC is an independent supplier in Muscat. We list Hilti power tools and firestop products, each with the manufacturer operating instructions, for contractors and maintenance teams in Oman and the GCC.
Hilti company profile
| Founded | 1941, Schaan, Liechtenstein |
|---|---|
| Founders | Martin Hilti and Eugen Hilti |
| Headquarters | Schaan, Liechtenstein |
| Ownership | Controlled by the Martin Hilti Family Trust (created 1980) |
| Product families | DX powder-actuated and BX battery fastening tools, stud fusion systems, mechanical and chemical anchors, CP and CFS firestop sealants and systems, MQ and MI installation channels, cordless power tools and measuring tools |
Milestones
- 1941: Martin and Eugen Hilti open a mechanical workshop in Schaan.
- 1948: Martin Hilti acquires a patent for fastening technology.
- 1952: The first international sales cooperation is agreed, in Italy.
- 1957: The DX 100 powder-actuated tool is introduced, which Hilti describes as the world's first.
- 1980: The Hilti family creates the Martin Hilti Family Trust.
Hilti product series
The power tools listed here include SDS Plus and SDS Max rotary and combihammers (TE 8-22, TE 70-22, TE 70-ATC/AVR), demolition hammers and breakers (TE 1000-AVR, TE 2000-22, TE 3000-AVR), angle grinders from 125 to 230 mm (AG 125-13S, AG 230-24D, AG 4D-22, AG 30D-22), cordless impact wrenches (SIW 6AT-22, SIW 10-22, SIW 20-22), the SF 30M-22 magnetic drill press, the SF 6H-22 hammer drill driver and the SC 6ML-22 metal-cutting circular saw. Many of the cordless models run on the 22 V Nuron battery platform.
Firestop products such as the CP 601S silicone sealant and CP 606 acrylic sealant seal penetrations and joints in fire-rated walls and floors.
Where Hilti tools are used
Drilling and anchoring in concrete, demolition and chiselling, steel fabrication and erection, bolting on structures and pipe supports, mechanical and electrical installation work and passive fire protection in buildings and industrial plants.
Hilti products we list
Ordering Hilti products: what we need
Give the tool designation and, if available, the item number. For cordless tools state whether you need the bare tool or a kit with batteries and charger; for corded tools give the supply voltage and plug type. For firestop products give the product, colour, cartridge size and quantity, and the fire rating or approval the project requires.
Facts checked against Hilti's published company history, October 2026.
Browse Hilti products by category: Material Handling & Lifting Equipment.
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Frequently Asked Questions
What is Hilti CP 601S?
A silicone-based firestop sealant, also named CFS-S SIL, for fire-rated joints and pipe penetrations.
Why choose silicone over acrylic?
Hilti describes the CP 601S as providing maximum movement in fire-rated joints.
What is the application temperature range?
5 to 40 deg C per the Hilti product page.
Does it need a primer?
Hilti states it is designed to adhere well without primer.
What does the instruction sheet show?
Joint and penetration steps with a 24 hour reference at 23 deg C and 50 percent relative humidity.
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