One of the mysteries of the English language finally explained.
(of a coating or sealant) swelling up when heated, thus protecting the material underneath or sealing a gap in the event of a fire.‘intumescent fire-retardant paints’
- ‘If alternative panels cannot be used then the ends of the sandwich panels must be sealed and locked together in a non-combustible wall intumescent seal.’
- ‘Columns of the arcade are simply the rolled steel members of the frame, exposed and made silver with intumescent paint.’
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