PRODUCT OVERVIEW
F. Ball Stopgap 600
Description
Product Overview
F. Ball Stopgap 600 is designed for projects where the subfloor needs a substantial increase in height before new flooring is installed.
Typical uses include rebuilding floor levels after removing thick tiles and adhesive beds, or bringing adjoining floors to a consistent height during refurbishment and extension work.
The dimensionally stable formulation is designed for deeper applications, helping control the separation and thermal movement that can affect standard smoothing compounds when applied too thickly.
Once set, Stopgap 600 must receive a compatible finishing layer before floorcoverings are installed. This allows the base layer to provide the required depth while the selected smoothing compound provides the final installation surface.
Key Features
- Deep-section formulation for raising subfloor levels
- 5–75mm application range under the April 2026 UK specification
- Suitable for light to heavy-duty internal floors
- Compatible with prepared absorbent and non-absorbent substrates
- Dimensionally stable after application
- Water-mixed powder
- Suitable for manual or pump installation
- Low-odour, protein-free formulation
- EC1 Plus very low-emission classification
- Designed to receive a compatible Stopgap finishing compound
Applications
- Raising internal subfloor levels before new flooring
- Building up floors after removing thick tiles or adhesive beds
- Matching floor heights between adjoining areas
- Deep-section preparation in refurbishment projects
- Application over prepared concrete, sand/cement screeds and granolithic surfaces
- Application over suitable terrazzo, ceramic tiles and quarry tiles
- Application over compatible epoxy, polyurethane and Stopgap membrane surfaces
Notes
- Prepare a sound substrate, removing contaminants, laitance and incompatible surface treatments
- Confirm moisture conditions and any required moisture-control system before installation
- Prime absorbent surfaces with diluted Stopgap P131 and suitable non-absorbent surfaces with neat Stopgap P141
- Allow the primer to dry
- Add powder gradually to measured water and mechanically mix for at least two minutes
- Use approximately 4.25L of water per 25kg bag; above 15mm depth, F. Ball advises reducing this to 4.0L
- Never exceed 4.5L of water per bag
- Spread with a smoothing trowel and maintain suitable drying conditions
- Once set, cap with at least 3mm of an approved Stopgap smoothing compound
- Follow the selected capping compound’s priming and floorcovering-installation requirements
Technical Information
| Specification | Details |
|---|---|
| Product Name | F. Ball Stopgap 600 |
| Product Type | Cementitious deep-section base compound |
| Location | Internal floors |
| Duty Classification | Light to heavy duty |
| Application Thickness | 5–75mm in one application — April 2026 UK specification |
| Application Method | Hand or pump |
| Standard Mixing Water | 4.25L per 25kg bag |
| Recommended Water Above 15mm | 4.0L per 25kg bag |
| Permitted Water Range | 4.0–4.5L per 25kg bag |
| Working Time at 20°C | 20–30 minutes |
| Walk-On Time at 20°C | Approximately 3 hours |
| Ready for Capping at 20°C | Approximately 3 hours |
| Minimum Smoothing-Compound Cap | 3mm of an approved compatible compound |
| Direct Floorcovering Installation | Requires a compatible finishing layer first |
| Consumption | Approximately 1.81kg/m² per mm thickness |
| Coverage at 5mm | Approximately 2.8m² per 25kg bag |
| Coverage at 15mm | Approximately 0.9m² per 25kg bag |
| Coverage at 20mm | Approximately 0.7m² per 25kg bag |
| Coverage at 50mm | Approximately 0.3m² per 25kg bag |
| 28-Day Compressive Strength | Greater than 30N/mm² |
| 28-Day Flexural Strength | Greater than 7N/mm² |
| Declared Performance | CT-C30-F7 to EN 13813:2002 |
| Emission Classification | EC1 Plus |
| Packaging | 25kg bag |
| Shelf Life | 9 months unopened under specified storage conditions — April 2026 UK TDS |
