{"product_id":"nor720-acoustic-smoke-door-seal","title":"NOR720 Acoustic \u0026 Smoke Door Seal","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNorseal Norsound NOR720\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a discreet \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ekerf-fit acoustic and smoke door seal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e designed to provide an effective seal around timber doorsets without the need for a surface-mounted profile.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eManufactured from flexible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTPE (thermoplastic elastomer)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the NOR720 is fitted into a narrow machined groove or kerf within the door or frame. Its flexible sealing fins compress or deflect when the door closes, helping to reduce gaps through which \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eairborne sound and ambient-temperature smoke\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e can pass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe NOR720 is suitable for installation around the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ehead and jambs of smoke-control doorsets\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and can also be used at the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003emeeting stile of acoustic doorsets\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This makes it particularly useful where acoustic or smoke-control performance is required while maintaining a neat and unobtrusive appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe seal has been \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003esmoke tested in accordance with BS 476-31.1\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eacoustically tested in accordance with BS EN ISO 10140-2\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it a strong choice for commercial, residential, hospitality, healthcare, educational and public-building applications where effective perimeter sealing is important.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features \u0026amp; Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eHigh-performance \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eacoustic and smoke door seal\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eKerf-fit design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for a neat and discreet installation\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSuitable around the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ehead and jambs of smoke-control doorsets\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSuitable for the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003emeeting stile of acoustic doorsets\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eHelps reduce the transmission of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eairborne sound through perimeter gaps\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eHelps restrict the passage of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eambient-temperature smoke\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eManufactured from flexible and durable \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTPE\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAcoustically tested in accordance with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBS EN ISO 10140-2\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSmoke tested in accordance with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBS 476-31.1\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCompact \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5 × 4.2 mm profile\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAvailable in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e2100 mm and 3000 mm lengths\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAvailable in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack, Brown and White\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOther lengths may be available subject to manufacturer availability\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhere is the NOR720 Used?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe NOR720 is designed primarily for use with timber acoustic and smoke-control doorsets and is suitable for applications such as:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHotels and guest accommodation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eApartment and residential developments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOffices and meeting rooms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSchools and universities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHospitals and healthcare facilities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePublic buildings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCommercial developments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConference and meeting facilities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRooms requiring increased acoustic privacy\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eOn acoustic doorsets, sealing the gaps around the door leaf is particularly important. Even small uncontrolled air gaps can provide a path for airborne sound, so perimeter, meeting-stile and threshold seals should be considered as part of the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ecomplete acoustic doorset specification\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKerf-Fit Installation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUnlike a self-adhesive surface-mounted door seal, the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOR720 is installed into a machined groove or kerf\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, resulting in a particularly neat finished appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNorseal's installation guidance specifies a kerf approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3 mm wide × 4 mm deep\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with the NOR720 pressed securely into the prepared groove. At corners, the seal should be cut at approximately 45° to maintain a continuous perimeter seal.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen installed adjacent to a door stop, Norseal recommends that the seal overlaps the stop by approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e0.5–1 mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to achieve the required compression when the door closes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eInstallation should always be carried out in accordance with the manufacturer's current fitting instructions and the requirements of the particular doorset.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCan the NOR720 Be Used at the Bottom of a Door?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eYes. Norseal's fitting instructions also state that the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOR720 can be used as a door-bottom seal when combined with a suitable threshold plate\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. For this arrangement, Norseal specifies a floor-to-door-bottom gap of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e7–9 mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor higher-performance acoustic doorsets, a dedicated automatic drop seal may offer a more appropriate threshold-sealing solution depending on the required acoustic performance and doorset specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Information\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eProduct:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Norsound NOR720\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eManufacturer:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Norseal\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProduct Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Kerf-fit acoustic and smoke seal\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Head and jambs of smoke-control doorsets \/ meeting stiles of acoustic doorsets\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eFixing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Kerf-fit \/ rebated\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e TPE\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProfile Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5 × 4.2 mm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eStandard Lengths:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 2100 mm and 3000 mm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eColours:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black, Brown and White\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eSmoke Testing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e BS 476-31.1\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eAcoustic Testing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e BS EN ISO 10140-2\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eNOR720 vs NOR710 – What's the Difference?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBoth the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNorseal NOR720 and NOR710\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e are designed to improve acoustic and smoke sealing around doors, but their method of installation is different.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOR720 is a kerf-fit seal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, meaning that it is inserted into a narrow groove machined into the door or frame. This produces a very neat installation and is particularly suited to doorsets where the seal can be incorporated during manufacture or machining.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOR710 is self-adhesive and surface mounted\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it particularly useful for retrofit installations where machining the existing door or frame is undesirable.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe most appropriate seal should therefore be selected according to the doorset design, required performance and method of installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhy Choose the Norseal NOR720?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe effectiveness of an acoustic or smoke-control doorset depends heavily on controlling gaps around the door leaf. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNorsound NOR720 kerf-fit door seal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides a compact and discreet means of sealing these gaps while maintaining low visual impact on the finished doorset.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts combination of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eacoustic testing, smoke-control performance, compact dimensions and concealed kerf-fit installation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e makes it particularly suitable for professionally manufactured timber doorsets and specification-led projects.\u003c\/span\u003e\u003c\/p\u003e","brand":"Roundtower Hardware","offers":[{"title":"Brown","offer_id":54133647278398,"sku":null,"price":6.0,"currency_code":"EUR","in_stock":true},{"title":"Black","offer_id":54133647311166,"sku":null,"price":6.0,"currency_code":"EUR","in_stock":true},{"title":"White","offer_id":54133647343934,"sku":null,"price":6.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/4422\/1502\/files\/NOR720-768x420.png?v=1786979026","url":"https:\/\/www.roundtowerhardware.com\/products\/nor720-acoustic-smoke-door-seal","provider":"Roundtower Hardware","version":"1.0","type":"link"}