
Bostik
Crommelin Shower Sealer and Waterproofer is a clear, water-based liquid designed to help waterproof a shower and keep moisture where it belongs. It penetrates the surface and dries clear, so it works on showers without changing their appearance.
If you are wondering what to use to waterproof a shower, this water-based sealer is an easy option for both internal and external use. Understanding the difference between a sealer and a waterproofer matters here: this product does both jobs, sealing the surface while creating a watertight barrier. Follow the Crommelin shower sealer instructions on the label for surface prep and application.
Crommelin Shower Sealer is a 500ml clear, water-based liquid designed to create a watertight seal for your shower, helping protect against moisture. It is highly penetrating and dries completely clear.
Prepare a clean surface and apply the clear, water-based liquid as directed on the label. It penetrates the surface and dries clear.
This product performs both roles, sealing the surface while forming a watertight barrier against moisture.
A water-based product like this 500ml Crommelin sealer is designed to help waterproof showers, internally and externally.
No. It is clear and dries completely clear, so it does not alter the appearance.
Each bottle holds 500ml (0.5L) of clear water-based sealer.
Yes, it is suitable for both internal and external use.

