- sound damping underlay for sandwich constructions in connection with various top layers according to
   purpose of use
- available as self leveling or thixotropic material
- not readily ignitable, therefore combination with all toplayers possible
- high sound damping effect for impact sound and structure borne noise problems due to a high loss factor
   for a wide frequency range further information: see separate sound technical data sheet.
- very good adhesion to pretreated steel-, aluminium and galvanized decks
- ready to walk on after 12-14 hours (20℃)
Standard thickness TEFROTEX VISCOELASTIC 1.0 ~ 2.0mm
Toplayer depending on type and requirements
Density approx. 1.4kg/㎡/mm
All deck areas have to be pretreated with intact shopprimer. These areas have to be dry, clean and free from rust, oil and other foreign matter. Other deck types upon request.
TEFROTEX VISCOELASTIC complies with SOLAS 1974 and IMO Resolution A653(16)/A687(17), MED EC 96/98, FTP-Code Part 2.
Floating floors are applied in areas where A-60 class deck is required and/or high airborne or structure borne sound insulation is needed. The principle of the floating floor is that the vibration transmitted is reduced by means of the mineral wool so the vibration level of the top plate and hence the radiated noise is lower. A floating floors can be ascribed as a mass/spring system, with a frequency of resonance corresponding to the stiffness if the mineral wool and the weight of the top layer.

The floor has the optimum acoustical properties characterized by the following :

- Heavy mass of the top plate
- Heavy mass of the top plate
- Low resonance frequency in the floating floor construction

For frequencies below the resonance frequency of the floating floor, the noise reduction will theoretically be zero. The resonance frequency for the floating floors is normally approximately 80-100Hz.

GTF KOREA has actually developed following basic noise reducing floor constructions, which can be adapted to individual demans.
The sound damping system are normally applied in areas where only structure borne or impact sound contribution is substantial. The principle of the sound damping floor is that the vibrations are absorbed by means of a specially designed constrained layer construction reducing the vibration level in the local plate fields of the ship deck structure, hence reducing the radiated noise into the accommodation. This method is often referred to as viscoelastic damping or constrained damping constructions.

A vibration damping floor having the optimum acoustical properties are characterized by the following.

- High loss factor of the viscoelastic material.
- Low shear module of the viscoelastic material.
- High module of elasticity of the top plate.
- Optimized thickness of each layer.