Ball Stopgap 300HD Screed - 25kg - Smoothing Compound
Ball Stopgap 300HD Screed - 25kg - Smoothing Compound is backordered and will ship as soon as it is back in stock.
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| Area | Excluded postcodes |
|---|---|
| North-east Scotland | AB31–AB45, AB51–AB56 |
| Central & northern Highlands | FK19–FK21; all IV |
| Outer Hebrides | All HS |
| Arran & Cumbrae | KA27–KA28 |
| Caithness, east Sutherland & Orkney | All KW |
| Argyll & Inner Hebrides | PA21–PA38, PA41–PA49, PA60–PA78 |
| Perthshire & western Highlands | PH1 1, PH1 3, PH1 4, PH5–PH10, PH15–PH26, PH30–PH44, PH49–PH50 |
| Shetland | All ZE |
| Northern Ireland | All BT |
| Channel Islands & Isle of Man | All GY, JE & IM |
| Isles of Scilly | TR21–TR25 |
Need delivery outside our standard area? Please contact us before ordering and we’ll check whether a separate service can be arranged.
Click & Collect Any quantity • subject to stock FREE
F. Ball Stopgap 300 is a heavy-duty, fast-drying self-smoothing compound designed for preparing sound absorbent and non-absorbent internal subfloors before the installation of new floor coverings.
Its high-strength, dimensionally stable formulation makes it suitable for light to heavy-duty environments, including demanding commercial and industrial flooring projects. Stopgap 300 mixes with clean water, can be applied by hand or pump and provides a smooth, durable base for wood flooring, LVT, vinyl, carpet and other floor coverings.
Why Choose F. Ball Stopgap 300?
- Heavy-duty smoothing compound for demanding flooring installations.
- Suitable for sound absorbent and non-absorbent subfloors.
- Fast drying for quicker installation of new floor coverings.
- Application thickness from 2mm to 20mm.
- Excellent self-smoothing properties.
- Suitable for hand or pump application.
- Low odour and protein free.
- Suitable for biologically sensitive environments, including hospitals.
- High compressive strength and excellent dimensional stability.
Recommended Applications
F. Ball Stopgap 300 can be used over correctly prepared:
- Concrete subfloors.
- Sand and cement screeds.
- Calcium sulphate and anhydrite screeds.
- Minimal, well-bonded adhesive residues.
- Sound flooring-grade asphalt.
- Granolithic and terrazzo floors.
- Epoxy and polyurethane resin surfaces.
- Ceramic and quarry tiles.
- Suitable waterproof surface membranes.
Professional Advice
Stopgap 300 is an excellent choice when a strong, durable smoothing compound is required for a commercial, industrial or high-traffic installation.
The correct preparation and primer depend on the substrate. Browse our F. Ball levelling compound primers, including P121, P131 and P141, and always follow the latest F. Ball Technical Data Sheet for the specific subfloor.
Technical Specifications
| Product Type | Heavy-duty self-smoothing compound |
|---|---|
| Pack Size | 25kg |
| Mixing Liquid | 5.5 litres of clean water per 25kg bag |
| Coverage | Approximately 5m² at 3mm thickness |
| Consumption | Approximately 1.67kg/m² per millimetre of thickness |
| Application Thickness | 2–20mm |
| Working Time | Approximately 20–30 minutes at 20°C* |
| Walk-On Time | Approximately 90 minutes at 20°C* |
| Ready to Cover | From approximately 6 hours on absorbent subfloors and 12 hours on non-absorbent subfloors* |
| Application Method | Hand or pump application |
| Classification | CT-C35-F7 |
| Suitable Areas | Internal domestic, commercial, industrial and biologically sensitive environments |
Build Your Perfect Subfloor
Correct preparation is essential for a smooth, strong and long-lasting flooring installation.
1. Check for Moisture
Test the subfloor before beginning. Where moisture control is required, select a compatible damp proof membrane from our Liquid DPM collection and follow the relevant manufacturer's system requirements.
2. Select the Correct Primer
The primer required depends on whether the substrate is absorbent or non-absorbent. View the full range of F. Ball levelling compound primers, including Stopgap P121, Stopgap P131 and Stopgap P141.
3. Repair Damaged Areas
Use Stopgap Micro Rapid for feather-edging, fine surface imperfections and small localised repairs. For deeper holes, damaged screeds and larger repairs, use Stopgap 400 Repair.
4. Choose the Right Levelling Compound
Stopgap Fast-Track 30 – Choose this when installation speed is the main priority.
Stopgap 700 Superflex – Fibre-modified smoothing compound for plywood and other flexible substrates.
Stopgap 1200 Pro – Ideal for applying over suitable well-bonded adhesive residues, including bitumen and carpet tile tackifier residues.
Stopgap 300 – The heavy-duty choice for sound absorbent and non-absorbent subfloors in light to heavy-duty environments.
Need Help Choosing?
Not sure which primer, repair product or levelling compound is right for your floor? Contact our flooring specialists with details of the substrate, moisture readings, required application depth and the floor covering being installed.
Important Information
- For internal use only.
- The subfloor must be sound, clean and correctly prepared.
- Remove contamination, loose material and incompatible residues before application.
- Use the correct primer for the substrate in accordance with F. Ball guidance.
- Do not exceed the stated water quantity, as this can reduce strength and performance.
- Always read the latest F. Ball Technical Data Sheet before use.
*Working, setting and drying times are based on approximately 20°C. Lower temperatures, increased humidity, poor airflow or thicker applications will extend drying times. Coverage will vary according to substrate condition and application thickness.