Merks Rapid Stop: Fast-Setting Solution for Active Water Leaks
Merks Rapid Stop is a single-component, cement-based waterproofing material specially developed to stop active water leaks quickly and effectively. When mixed with water, it expands to form a watertight, water-repellent plug that instantly blocks water ingress. Its high-pressure resistance makes it an ideal solution for sudden and heavy water seepage in concrete structures.
Key Features
- Single-component formulation: Requires only water for mixing
- Rapid setting: Designed for emergency water leak repairs
- Expanding structure: Forms a strong waterproof plug
- High pressure resistance: Suitable for active water infiltration
- Chloride-free composition: Safe for reinforced concrete and steel reinforcement
- Easy application: Simple preparation and installation process
Applications
Merks Rapid Stop is suitable for a variety of repair and waterproofing applications, including:
- Stopping active water leaks in concrete structures
- Sealing water seepage through static cracks
- Waterproofing tie-rod holes and construction joints
- Sealing cable penetrations and service openings
- Supporting negative-side waterproofing systems
- Emergency leak repair in basements, tunnels, and underground structures
Surface Preparation
Before application, all surfaces must be structurally sound and free from oil, dirt, rust, loose particles, and contaminants. Water jet cleaning may be used when necessary.
Areas requiring plugging should be opened to a depth of approximately 2–2.5 cm to ensure proper bonding and sealing performance.
Mixing Instructions
- Remove only the amount of material that can be applied within 60 seconds.
- Mix with clean water until a putty-like consistency is achieved.
- Protective gloves must be worn during preparation and application.
- The prepared mixture should be used within 30 seconds.
- In cold weather conditions, warm water may be used to accelerate setting.
Application Method
- Shape the prepared material by hand into a plug.
- Firmly press it into the leaking area and hold it in place until it hardens.
- Do not rub or spread the material during setting.
- For heavy water flow or deep voids, apply in multiple layers if necessary.
- After application, keep the repaired area damp for approximately 15 minutes to ensure proper curing.
Advantages
- Effectively stops active water leaks
- High resistance to water pressure
- Ready to use with only water addition
- Expands to create a waterproof seal
- Chloride-free and safe for reinforced concrete
- Allows follow-up construction work after approximately 15 minutes
- Easy and practical application
Technical Specifications
| Property | Value |
|---|
| Composition | Mineral fillers and polymer-modified special cement |
| Appearance | Gray powder |
| Compressive Strength | ≥ 25 N/mm² |
| Application Temperature | +5°C to +30°C |
| Pot Life | Approximately 30 seconds |
| Packaging | 5 kg and 20 kg plastic buckets |
| Shelf Life | 12 months in unopened packaging |
Storage Conditions
Store in unopened original packaging in a dry, frost-free environment. Under proper storage conditions, the product has a shelf life of 12 months.
Why Choose Merks Rapid Stop?
Merks Rapid Stop provides an immediate and reliable solution for active water leaks where conventional waterproofing materials cannot perform effectively. Its fast-setting, expanding formulation enables quick repairs even under continuous water pressure, minimizing downtime and preventing further structural damage.
Its ease of use and rapid curing make it an essential product for waterproofing professionals, maintenance teams, and repair contractors working in demanding environments.
Frequently Asked Questions (FAQ)
1. What is Merks Rapid Stop used for?
It is used to stop active water leaks and seal water seepage through cracks, joints, tie-rod holes, and service penetrations.
2. Is it a single-component product?
Yes. It only requires water to prepare the repair mortar.
3. How soon can additional work be carried out after application?
Follow-up construction or waterproofing work can generally begin approximately 15 minutes after application.
4. Is Merks Rapid Stop flexible?
No. It is a rigid repair material designed specifically for stopping active water leaks.
5. Can it be used under water pressure?
Yes. Its expanding and pressure-resistant formulation makes it highly effective against active water infiltration and hydrostatic pressure.