Material properties of window seals in general

Materials science window seals

The window or door seals are largely responsible for the function of building elements. The quality of window seals has been constantly improved in order to meet the high demands in terms of form and function, as well as a longer service life. Window seals that have become hard or severely deformed have been a thing of the past for many years. New production methods and improved formulations are the reason for this. Here is an excerpt of the various materials used in the manufacture of window and door seals:

TPE ( thermoplastic elastomers )

TPE (SEBS, plasticizer-free, approx. 56° - 60° Shore A) = good resistance to ageing, weathering, ozone and good UV stability as well as the best physical properties, PVC-free, no plasticizer migration, therefore also very compatible with water-thinnable acrylic glazes and paints.
This material is very popular and frequently used for window and door seals.
Temperature range: from -40°C to + 80°C / Applications: Windows, doors, furniture industry.
Properties of TPE:
  • all degrees of hardness from very soft to quite hard can be achieved
  • excellent UV, ozone and weathering resistance
  • pronounced insensitivity to low temperatures (down to - 40 °C)
  • generally high thermal resistance
  • good electrical insulation
  • good sterilizability
  • insensitive to water
  • easy to color
  • easy to process

Silicone rubber

Silicone rubber = permanent elasticity with low compression set (absolutely elastic), extreme resistance to ageing, very high UV and temperature resistance as well as full resistance to water-based and conventional paints.
Properties of silicone window seals: - the window seals do not require any "maintenance" or additional care - the very soft material guarantees the lowest closing pressure of your windows - very high resistance to ageing in the temperature range of - 60° - + 250° Celsius. - the window seals do not stick to the window frame or sash.
Application: Windows and doors of all types, conservatories
Properties of silicone window seals:
  • the window seals do not require any "maintenance" or additional care
  • the very soft material guarantees minimal closing pressure on your windows
  • very high resistance to ageing in the temperature range of - 60° - + 250° Celsius.
  • the window seals do not stick to the window frame or sash.

EPDM

EPDM-X+PP = excellent weather and ozone resistance, good UV stability as well as the best physical properties, PVC-free, no plasticizer migration and therefore compatible with water-thinnable acrylic glazes and paints. Temperature range: from -30°C to + 100°C.

Applications: Front doors, windows, gates, conservatories, glazing

PVC

PVC (polyvinyl chloride) = good physical and thermal properties as well as good resistance to ageing, weathering, ozone and good UV stability, no compatibility with acrylic glazes/lacquers.