OB1 Fire Resistant Hybrid Sealant 290ml White is a durable, fire-retardant hybrid sealant for linear joints. Tested according to EN 1366-4, this white hybrid sealant provides up to 4 hours fire resistance and will prevent the spread of fire, smoke or toxic gases. This hybrid sealant absorbs movement up to 25% and can be applied in horizontal joints and between walls and floors or ceilings to create a secure sealing. This fire-resistant hybrid sealant is paintable with most water and oil-based paints.