Greensound company produce all kinds of soundproof materials , vibration absorptive materials , water resistance materials with introduced japanese technology and equipments.the sound insulation has been popular for 30 years in japanese decoration market.It is well-known by its good sound insulation andvibration-absorptive effects.it is suitable for all floor structures.simply laying it without adhesive can bring its excellent sound insulation and vibration absorption into full play, and its hardness will not change with temperature.the testing report show that no any harmful gas or matter been tested out from the products in a using room?Our products can be well used in advanced chamber and residential building.?our products also have been through shanghai institute of acoustics tongji university and constructional and scientific research institute.we have good price and good quality,we welcome clients contact with us and have a good communication and cooperation.