Sandwich foil SFRT

Workshop machines, fans, mills, printers, material handling machines, particle separators, power equipment, generators, compressors, food processing machines, hoods.

Transportation and vehicles
Bus floors, off road vehicles, forest machines, ships and railway wagons.

Hospital care and large-scale kitchens
Kitchen sink units, dishwashing machines, dialysis machines, circulation pumps, air pumps, roller tables.

Elevators, steps, engine rooms, ventilation installations, doors, floors, transportation shoots, fans.

Printers, sorting- and enveloping machines, loud speakers.

Method of use
The parts are cut or stamped to the required shape and carefully pressed on to a surface that must be free from oil, dirt, and dust.

Sandwich foil SFRT is a viscoelastic foil of fibre- enforced bitumen.
The Foil has self-adhesive glue at both sides for the application in between two constraining layers of constructional material.
  • Very good structure damping also for thick constructions of wood and metal
  • Good damping for a wide frequency range
  • Increase the transmission loss, especially for wood constructions
  • Water-repellent
  • Long service life

Loss factor:
See PDF diagram.

Temperature resistance:
-25°C to +100°C

Fire class:

Coefficient of thermal conductivity:

Black, aluminium surface (additional).

Adhesive’s tear strength:
Approx. 15 N/cm test width

Coefficient of thermal conductivity:
Lambda = 0,011 W/m°C

Freon and PVC free.

2,6 mm

3,5 kg/m2

Delivery format:
1200x1000mm (other sizes and shapes can be supplied on request)

The shaping and positioning of the material is of major importance to achieve an optimal sound-dampening effect.
Sontech has long experience of practical noise control projects in a wide range of industrial fields. These experiences can be a valuable addition to the laboratory data given in the datasheet. Sontech can also assist with advice and sound measurements for noise control and in the manufacture of customised material sets.
Sandwich foil: SF

Optimised for room temperature: RT

Exampel of ordering code: SFRT