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Brand: Hilti
Hilti CP 606 Firestop Acrylic Sealant (CFS-S ACR)
Description
The Hilti CP 606 (also sold as CFS-S ACR) is a water-based acrylic firestop sealant used to restore fire-rated joints and to seal through penetrations such as cable trays and metal pipes. Hilti describes it as a universal fire caulk for concrete, masonry and drywall, and calls it a flexible firestop seal that helps prevent the passage of fire, smoke and toxic fumes.
Passive fire protection for joints and penetrations
Hilti lists sealing rigid or low-movement ceiling and wall joints from 6 to 30 mm wide, sealing cable tray penetrations and metal pipe penetrations, and use in masonry, concrete, plasterboard and metal. The product page adds acoustic insulation, electrical resistance, mould and mildew resistance, smoke and gas tightness, water tightness, paintability and a “Suitable for LAR” note. It carries the CE mark under an ETA and a cULus classification mark.
European Technical Assessment ETA-10/0389 (OIB Vienna, 2023-07-17, replacing the 2017 issue) covers the sealant as a linear joint and gap seal with mineral wool, Hilti firestop round cord CFS-CO or combustible backfill. Its intended use is to reinstate the fire resistance of flexible and rigid walls, rigid floors, timber walls and floors and steel constructions at linear gaps. The assessed classifications run from EI 30 to EI 180 depending on construction, joint width, depth and backfill.
Technical specifications
| Parameter | Specification |
|---|---|
| Product type | Water-based acrylic firestop sealant (CFS-S ACR / CP 606) |
| Base materials | Concrete, masonry, drywall (product page); also metal |
| Colours | Grey, red, white (product page) |
| Packaging | Cartridge, foil pack or bucket; pack size one piece |
| Application temperature | 2 to 40 deg C |
| Approximate curing time | 3 mm in 3 days at 24 deg C and 50 percent relative humidity |
| Joint width in applications list | 6 to 30 mm rigid or low-movement ceiling and wall joints |
| ETA | ETA-10/0389, EAD 350141-00-1106, linear joint and gap seals; assumed working life 25 years |
| Use category | Type Y2 (below 0 deg C, no exposure to rain or UV), which also meets Z1 and Z2 |
| Reaction to fire | Sealant Euroclass D (EN 13501-1); round cord CFS-CO A1; mineral wool backfill A1 |
| Movement capability | Class F-12,5P-M1uP (EN ISO 11600) |
| Air permeability | None measured up to 600 Pa pressure difference in the ETA |
| Density (safety data sheet) | 1.6 g/cm3, pasty, pH approximately 9 |
| Storage (safety data sheet) | Dry place, closed container, 1.5 to 35 deg C |
| Product class on page | Ultimate |
Use and installation notes
The Hilti instruction sheet shows joint and penetration seal steps and a 2 hour reference at 23 deg C and 50 percent relative humidity before the next step. Fire ratings apply to the tested constructions only: the ETA lists joint widths, depths, compression, orientation and backfill for each classification, so the assembly must match an assessed detail. Sealants are applied to clean, dry, load-free surfaces with the specified backfill, and the sealed joint should be recorded for inspection.
Selection and ordering checks
Confirm the construction type, joint width and depth, backfill, required fire resistance period, colour and the pack format before ordering, and ask for the approval document that matches the project jurisdiction. For other Hilti firestop products such as silicone sealant CP 601S, collars, wraps, putty and cable transit systems, see the Hilti firestop range.
Documents and quotation
For a quotation on the CP 606, 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 ETA-10/0389 for the CFS-S ACR firestop acrylic sealant and the English safety data sheet are attached as manufacturer PDFs. 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
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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 606?
A water-based acrylic firestop sealant, also named CFS-S ACR, for fire-rated joints and penetration seals.
What joint widths does Hilti list?
Hilti lists rigid or low-movement ceiling and wall joints from 6 to 30 mm; the ETA tables list further widths per construction.
What is the application temperature range?
2 to 40 deg C according to the Hilti product page.
What movement class does the ETA give?
The ETA states class F-12,5P-M1uP under EN ISO 11600.
Which fire classifications are assessed?
ETA-10/0389 lists EI classifications from EI 30 to EI 180 depending on construction and joint details.
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