Substances which swell as a result of heat exposure thus increasing in volume and decreasing in density. Intumescents are typically endothermic to varying degrees, as they can contain [chemically] bound water. Intumescents are used in firestopping, fireproofing and gasketing applications. Some intumescents are susceptible to environmental influences such as humidity, which can reduce or [negate] their ability to function. DIBt approvals [quantify] the ability of intumescents to stand the test of time against various environmental exposures. DIBt approved firestops and fireproofing materials are available in Canada and the US. DIBt approvals have a [finite] validity and one must check the expiry date, which is printed on the front of the approval document.

]]>https://definedictionarymeaning.com/topic/148408/intumescentRSS for NodeThu, 04 Jun 2026 19:04:39 GMTThu, 09 Jul 2020 10:06:20 GMT60(of a coating or sealant) swelling up when heated, thus protecting the material underneath or sealing a gap in the event of a fire.

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