Engineering solutions in the field of
lubricants and sealants

Materials: Dow Corning
Sealant Dow Corning 3-6891


  • Applications
  • Features



Dow Corning 3-6891 One-Part Silicone Rubber Abradable Sealant Compound is a black, one-part abradable material that cures with heat to become a flexible rubber. Compared to other silicone products, it has the following unique combination of features:

• Low density
• High temperature stability
• High abradability/machinability

These features are particularly suited for the product’s use as an abradable seal and rubstrip for the compressor blades of jet engines, as well as for high-temperature thermal insulation.
The product meets United Technologies Pratt & Whitney specification PWA 36447.


Dow Corning 3-6891 One-Part Silicone Rubber Abradable Sealant Compound can be cast, troweled or injected into place using standard one-component processing equipment. A typical schedule for jet engine use cures the material for two hours at 300°F. Lower temperatures may require additional
time to reach full cure.
Стандарт Показатель Ед. изм. Значение
Внешний вид (консистенция)Паста
МПаПредел прочности на разрыв4,13
МПаПрочность на срез при соединении внахлёст (слой герметика 12,7 х 25,4 х 1 мм) на алюминии 20242,41
%Относительное удлинение при разрыве70
Твердость по Шору А75
г/млУдельный вес0,95
МПаМодуль упругости5,9