Material

PROSPEC Decibel Drop is a high-performance viscoelastic damping compound. It provides an
economical solution for reducing sound transmission into adjacent areas. Each case contains
12 - 29 oz. cartridges.

Installation

• Use on walls, floors and ceilings
• Use in new construction or retrofit applications
• Apply 2 to 3 cartridges per 4' x 8' (32 sq. ft. of drywall) randomly over surface area;
  No trowling required
• Press drywall to first layer of drywall already installed
  and screw it to the studs
• Install on one or both sides of the wall
• See installation guide and product animation for more information

Sound Transmition — PROSPEC Decibel Drop

Material (click to enlarge)	STC	Studs	Sources Side	Receiving Side
	50	Wood	2 layers of drywall with PROSPEC Decibel Drop	1 layer of drywall
	54	Wood	2 layers of drywall with PROSPEC Decibel Drop	2 layers of drywall with PROSPEC Decibel Drop
	57	Steel	2 layers of drywall with PROSPEC Decibel Drop	1 layer of drywall
	62	Steel	2 layers of drywall with PROSPEC Decibel Drop	2 layers of drywall with PROSPEC Decibel Drop
	57	Staggered Wood	2 layers of drywall with PROSPEC Decibel Drop	1 layer of drywall
	62	Staggered Wood	2 layers of drywall with PROSPEC Decibel Drop	2 layers of drywall with PROSPEC Decibel Drop
	40	Wood	1 layer of drywall	1 layer of drywall
	45	Wood	2 layers of drywall	2 layers of drywall
	52	Steel	2 layers of drywall	2 layers of drywall
	44	Staggered Wood	1 layer of drywall	1 layer of drywall
	53	Staggered Wood	2 layers of drywall	2 layers of drywall
	46	Wood	1 layer of soundboard and 1 layer of drywall	1 layer of soundboard and 1 layer of drywall
	44	Wood	2 layers of drywall with mass loaded vinyl	1 layer of drywall

PROSPEC Decibel Drop’s effect on Wood Stud Wall Assemblies		PROSPEC Decibel Drop’s effect on Staggered Wood Stud Wall Assemblies
1 layer of drywall on both sides (G) 2 layers of drywall on both sides (H) Side 1 with 2 layers of drywall and PROSPEC Decibel Drop, Side 2 with 1 layer of drywall (A) 2 layers of drywall with PROSPEC Decibel Drop on both sides (B)		1 layer of drywall on both sides (J) 2 layers of drywall on both sides (K) Side 1 with 2 layers of drywall and PROSPEC Decibel Drop, Side 2 with 1 layer of drywall (E) 2 layers of drywall with PROSPEC Decibel Drop on both sides (F)
PROSPEC Decibel Drop’s effect on Single Steel Stud Wall Assemblies		The Superior Low Frequency Isolation of PROSPEC Decibel Drop on Wood Stud Wall Assembles
2 layers of drywall on both sides (I) Side 1 with 2 layers of drywall and PROSPEC Decibel Drop, Side 2 with 1 layer of drywall (C) 2 layers of drywall with PROSPEC Decibel Drop on both sides (D)		2 layers of drywall with PROSPEC Decibel Drop on both sides (B) Soundboard assembly (L) Mass loaded vinyl assembly (M)

Physical Data — PROSPEC Decibel Drop