Hilti

CP 606 Flexible Firestop Sealant

Water-based acrylic firestop sealant · INTL · manufacturer-sourced

Check your container: This countdown is for the Water-based acrylic firestop sealant variant. Similar-looking versions may have different times.

How long does Hilti CP 606 Flexible Firestop Sealant take to dry?

Short answer

Tack-free: 15 minutes after application.
Firestop sealants

Firestop cure plan

A skin is not a cure, and depth sets the pace

  1. Install the Water-based acrylic firestop sealant to the tested system
  2. Leave it undisturbed through the skin stage
  3. Wait for full cure before painting or inspection

This product’s stated stages Quoted at 73°F and 50% humidity

  • Tack-free15 minutes

Worth noticing: The manufacturer states only one timing here (tack-free, 15 minutes); nothing else is inferred.

Common mistake: Painting or covering a firestop that has skinned but not cured through.

Firestop sealants

Bond-strength path

Assembly, handling and full load are different stages

1 · AssembleClean, fit and apply the Water-based acrylic firestop sealant version correctly.
2 · HoldKeep the joint undisturbed through its set or clamp stage.
3 · LoadUse full cure—not surface firmness—before demanding use.

Time the firestop cure

When was the sealant installed?
Conditions that affect drying
Where?
Thickness

Stated times

  • Tack-free15 minutes

From Hilti data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.

Manufacturer website: hilti.com

Conditions & fine print
  • Stated conditions: 73°F (23°C) and 50% relative humidity
  • Firestop sealant must be installed to the tested system and inspected. Cure advances from the surface inward, so depth matters. Follow the current data sheet.
  • Temperature range: 41°F to 104°F
  • Region INTL. Formulas can differ between countries; check your container.
  • Tack-free: At 23°C (73°F) and 50% relative humidity.
  • Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Confirm this is your product

Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.

Exact listing
Hilti CP 606 Flexible Firestop Sealant
Variant
Water-based acrylic firestop sealant
Region
INTL
Listed use
firestop at low-movement joints, small pipes
Timed stages recorded
tack free
Source checked
2026-10-25

Documentation: Technical data sheet · Edition April 2011, updated May 2013

Condition attached to the stated time: At 23°C (73°F) and 50% relative humidity.

About this product

A water-based acrylic firestop sealant for low-movement fire-rated joints and small pipes. The only timed fact is a 15 minute skin time. The sheet is the South African edition from 2011, updated in 2013, and it limits use to 5 to 40°C and not for areas immersed in water.

Using this specific product

Hilti CP 606 Flexible Firestop Sealant is listed here as the Water-based acrylic firestop sealant version for firestop at low-movement joints and small pipes. For sealing a firestop opening, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.

Before you start

  • Confirm the package says Water-based acrylic firestop sealant; related versions can use different timing.
  • For firestop at low-movement joints and small pipes, pay particular attention to temperature, joint depth, humidity and the thickness of the bead.
  • At 23°C (73°F) and 50% relative humidity.

How to check readiness

Confirm the sealant is tack-free and cured to depth before the opening is inspected or the area is closed up. The sheet lists a skin forming time of 15 minutes.

Avoid this mistake

Tack-free is only the surface; the rated seal depends on the full depth cure shown on the sheet.

Compare with similar products

Keep going

Questions

How long does this product take to dry?

Hilti states: The sheet lists a skin forming time of 15 minutes. Conditions: At 23°C (73°F) and 50% relative humidity.. These are the manufacturer’s stated times, not a guarantee.

Does the CP 606 sheet give a cure time?

No. It lists only a skin forming time of 15 minutes at 23°C and 50% relative humidity, and says that once cured it can only be removed mechanically.

What affects how long this product takes to dry or cure?

Firestop sealant must be installed to the tested system and inspected. Cure advances from the surface inward, so depth matters. Follow the current data sheet. Follow the product label for your conditions.

Similar products

All firestop sealants