Green Glue is the simplest, most effective and affordable soundproofing product currently on the market for any sound proofing project. Green Glue can be used over any existing wall, floor or ceiling by simply adding another layer of material to reduce sound transfer. Just apply with a standard large size caulk gun in a random pattern for cost effective application. Green Glue has been tested in independent laboratories and has proven to be one the best sound proofing products available. Third party acoustical tests demonstrated a STC rating of 56 using green glue in a standard single stud wall with common drywall. Low Frequency sound isolation (not included in STC testing) was greatly improved over older techniques. Green Glue is also one of the few products that greatly reduces both, impact and airborne noise. Making it a great product for multiple family projects, hotels, offices, home theaters, recording studios, bedrooms, wood/tile floors and anywhere you want some peace and quiet.