{"product_id":"firoblok-intumescent-sleeves-for-round-plastic-ducting","title":"Firoblok Intumescent Sleeves for Round Plastic Ducting","description":"\u003cdiv class=\"OutlineElement Ltr SCXW232769655 BCX0\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"d6d5dada-f87a-49b8-b78b-ea1b6c2d310b\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"352\" class=\"PDq2pG_selectionAnchorContainer\"\u003eFiroblok Intumescent Sleeves for Round Plastic Ducting are foil-wrapped sleeves designed to provide fire protection where plastic ventilation ducts pass through fire-rated walls, floors, or ceilings. In the event of a fire, the intumescent material expands inward to seal the duct opening, helping to prevent the spread of fire, smoke, and hot gases. \u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003eThey also help reduce heat transfer, protecting nearby metal supports and services from overheating. Easy to cut and install flush with the surrounding surface, the sleeves additionally provide a protective barrier that helps prevent corrosion caused by contact with cement, plaster, or concrete.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW232769655 BCX0\"\u003e\n\u003cul\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-GB\" class=\"TextRun SCXW232769655 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003eFoil-faced, fibre-free intumescent material\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-GB\" class=\"TextRun SCXW232769655 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003eExpands in fire to seal round plastic ducts\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-GB\" class=\"TextRun SCXW232769655 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003eAbsorbs heat to protect metal supports and adjacent services\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-GB\" class=\"TextRun SCXW232769655 BCX0\"\u003e\u003cspan class=\"NormalTextRun ContextualSpellingAndGrammarErrorV2Themed SCXW232769655 BCX0\"\u003eGuards\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003educts against corrosion from cement, plaster, and concrete\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-GB\" class=\"TextRun SCXW232769655 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003eSupplied in multiple lengths; easy to cut and install flush with wall, floor, or ceiling\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"Paragraph SCXW232769655 BCX0\" lang=\"EN-GB\"\u003e\u003cspan class=\"NormalTextRun SCXW232769655 BCX0\"\u003eMaintains fire compartmentation in block, plasterboard, brick, and concrete constructions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Ducting Direct","offers":[{"title":"100mm","offer_id":53011789676886,"sku":"FISR-100mm","price":23.99,"currency_code":"GBP","in_stock":true},{"title":"125mm","offer_id":54357425258838,"sku":"FISR-125mm","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"150mm","offer_id":54357425291606,"sku":"FISR-150mm","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/0946\/2358\/files\/firoblok-intumescent-sleeves-for-round-plastic-ducting-100m-184.webp?v=1782464515","url":"https:\/\/ductingdirect.co.uk\/products\/firoblok-intumescent-sleeves-for-round-plastic-ducting","provider":"Ducting Direct","version":"1.0","type":"link"}