Isocyanates

Isocyanates are a group of highly reactive chemicals used in certain construction products, most commonly spray foam insulation (like PUR/PIR foams) and some coatings or sealants.

Why it matters:

• Isocyanates can cause serious respiratory irritation, asthma, and skin sensitization if inhaled or contacted during application.
• They are most dangerous during installation — once the material has cured, the risk is much lower.
• Tiny, airtight homes require careful handling because fumes can build up quickly in small spaces.

How to handle safely:

• Always use full protective gear (respirator, gloves, goggles) when applying products containing isocyanates.
• Ensure excellent ventilation during and after application.
• Prefer pre-cured or alternative insulation materials (e.g., natural wool, wood fiber) if you want to avoid chemical exposure.

Example:

• Spray polyurethane foam (PU foam) → contains isocyanates, must be installed by professionals.
• Wood fiber insulation → naturally safe, no isocyanates.