We have become aware of a recent case where HSE's investigation found a housing association maintenance company had failed to take appropriate precautions to ensure substances hazardous to health are not used when safer alternatives are available. They were fined £400,000 after the worker died laying a bathroom floor when he inhaled toxic vapours from flooring adhesive. The adhesive contained dichloromethane and the hose to the pressurised glue canister became damaged, releasing a large amount of adhesive into the poorly ventilated bathroom. The worker lost consciousness and collapsed, with emergency services having to force entry to the bathroom to reach him.

Dichloromethane (DCM) can be used in adhesives in the UK, but its use is strictly restricted to professional and industrial settings due to significant health risks, including potential carcinogenicity and asphyxiation. While banned for general public sale, trained professionals can use DCM-based adhesives, but must comply with stringent COSHH regulations to protect workers. BASA manufacturers have access to formulations that do not contain DCM, which are more suitable for trade use of flooring adhesives in bathrooms in domestic situations.

This case highlights the importance of training and understanding the risks associated with the professional use of some adhesives and sealants in professional environments, and the importance of carrying out a risk assessment before products are selected and used.

Respiratory Protective Equipment  is normally needed when using DCM-based products, especially in enclosed area. Constant flow airline breathing apparatus (CFABA) should be provided because DCM vapour can penetrate through respirator filters very quickly. HSE Leaflet DCM2 is an excellent leaflet on the COSHH essentials than anyone working with DCM containing products should read.