Product Description
Stopgap 500 is a high-quality, fast-setting, protein-free smoothing underlayment from F. Ball, designed for preparing internal subfloors prior to the installation of a wide range of floor coverings. Ideal for both commercial and domestic environments, it provides a smooth, level surface that ensures a professional finish and long-lasting performance.
This versatile levelling compound can be applied from 3mm to 20mm thickness in a single application, making it suitable for a variety of subfloor conditions. Its protein-free formulation makes it compatible with moisture-sensitive adhesives and floor coverings such as LVT, vinyl, rubber, and linoleum, helping to minimise the risk of future floor failure.
Stopgap 500 offers excellent flow and self-smoothing properties, allowing for easy application and consistent results across large areas. It can be used over concrete, sand/cement screeds, and other sound substrates when properly prepared and primed with an appropriate F. Ball primer.
Designed with efficiency in mind, Stopgap 500 has a walk-on time of approximately 3 hours and can receive floor coverings in as little as 24 hours, helping installers keep projects on schedule. Its low odour formulation also makes it suitable for use in occupied areas such as homes, offices, and retail spaces.
Reliable, easy to use, and highly effective, Stopgap 500 is a trusted choice for professional flooring contractors seeking a smooth, durable base.
Rapid drying
Protein free
Suitable over plywood joints
Suitable for light to medium traffic areas
Trowel applied
Can be used to form a feathered edge
Low odour
Coverage:
50m² at a thickness of Microcoat | 8m² at a thickness of 1mm




