Retractable door seal, DDS 12, for wooden doors, Startec

  • Application and function, automatic door seals
  • Area of application

    • Protection against cold, draught and vermin
    • Reduces light leakage
    • soundproofing
    • smoke control
    • Fire resistance
    • Safes energy of air conditioning systems (see following example)

    Example calculation of energy savings:

    Door width 960 mm,

    pressure difference between indoor and outdoor 10 Pa,

    room temperature 25°C and relative humidity of 90 %,

    outdoor temperature 35°C and relative humidity of 70 %,

    floor gap 7 mm

    Without seal: leakage rate approx. 41 m3/h

    With seal: leakage rate under 2 m3/h

    The area of application in which the door is used is mainly governed by the sealing profile material (PVC or silicone). High quality, self-extinguishing silicone seals are used for fire resistant and smoke control doors.


    Retractable door seals are available with single-side or double-side release mechanism. Seals with single-side release (with double doors) are released on the hinge side or on the lock side, depending on the model. Double-side release always means release at the hinge side and at the lock end. With double-side release seals, the sealing profile is raised and lowered faster, which prolongs its life time considerably.


    The sealing profile is pressed automatically against the floor or engages with a threshold as the door is closed.

    Automatic door seals can be distinguished between retractable door seals and sill seals.

    Sill seals are always used in combination with a threshold, it is, however, recommended to use retractable door seals also in combination with a threshold in case of carpet fitted floors or butt joints with different floor coverings.

  • Installation types, automatic door seals
  • Installation types

    Automatic door seals can be fitted in different ways depending on the model and application.

    Full mortice fitted, With mounting bracket

    Full mortice fitted and face fixed


    screwed on

    Plug-fitted and/or glue fixed (glass)

    screwed underneath


    Complete your selection



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    NONE Min. 1

    950.05.340 Dr.seal 630mm

    single-side release –, length 630 mm

    950.05.341 Dr.seal 730mm

    single-side release –, Length 730 mm

    950.05.342 Dr.seal 830mm

    single-side release –, length 830 mm

    950.05.343 Dr.seal 930mm

    single-side release –, length 930 mm

    950.05.344 Dr.seal 1030mm

    single-side release –, length 1,030 mm

    Product details

    Area of application

    For soundproofing doors (DIN 4109)
    for fire resistant and smoke control doors (BS and UL certified)


    Carrier: Aluminium
    sealing profile: Silicone, self-extinguishing


    Carrier: Unfinished
    sealing profile: Grey


    With single-side or double-side release (optional)

    Sound proofing value

    42 dB with 7 mm floor gap

    Sealing height

    ≤11 mm


    For full mortice fitting
    with mounting bracket

    Installation dim.

    Groove: 12 x 31 mm


    For DIN left hand and DIN right hand use
    Product Features

    Supplied with

    1 retractable door seal

    2 mounting brackets with screws

    2 release plates with screw

    Häfele China Co., Ltd.
    No. Jia 25, Yu Hua Road
    Area B, Tianzhu Airport Industrial Zone
    Beijing, 101318
    Tel: +86 10/8048 2686
    Fax: +86 10/8048 2885

    Retractable door seal, DDS 12, for wooden doors, Startec

    double-sided release –

    • single-side release

    • double-sided release

    • Single-side release

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