Will this work well if applied directly to the studs then 1 layer of drywall? Would this be more effective than 1/8" soundproofing tape?

The way to do that would be to decouple the drywall and the studs with resilient clips or channels. https://www.amazon.com/Green-Glue-Noiseproofing-Whisper-Clips/dp/B00HU5E1XA/ref=sr_1_10?camp=1789&creative=9325&keywords=%22resilient+sound+isolation+clip%22+1&linkCode=ur2&qid=1565794639&s=gateway&sr=8-10

can you use this on the back of an outdoor fence to muffle roadnoise?

This is not really meant for outdoor use.

Willl this work with an existing single wall construction house as an additional layer to reduce sound transmission?

I used it in conjuction with a second layer of drywall. It needs the second layer to spread the liquid over the surface of the first layer. Look it up on YouTube. There are a few instructional videos that explain the use rather well.

I'm adding a layer of drywall to a plaster wall. Do I need to paint primer on the plaster wall first?

No reason to in regards to the Green Glue with drywall. You do want to make sure the wall is smooth though, by sanding it down if necessary.

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Green Glue Damping Compound - 1 Tube

Product ID: 92170365

Details

Brand
Green Glue
Item Form
Ounce
Material
Plastic
Special Feature
Soundproofing
Specific Uses For Product
Wall Repair

📏16 sq ft coverage per tube

🔇+9 STC soundproofing boost

🛠️29 oz tube – industrial size

Description

🔇 Silence is the new luxury – upgrade your space with Green Glue!

MAXIMIZED COVERAGE - Covers up to 16 square feet, ensuring efficient application between drywall or plywood layers.
WATERPROOF DURABLE - Medium-high viscosity compound that resists moisture, ensuring long-lasting noise dampening.
INDUSTRIAL SCALE VOLUME - A generous 29 oz tube designed for serious soundproofing projects without constant refills.
PRO LEVEL SOUNDPROOFING - Boosts sound transmission class (STC) by 9 points, dramatically reducing noise transfer.
VERSATILE COMPATIBILITY - Works seamlessly with drywall, plywood, OSB, MDF, and cement board for flexible installation.

Green Glue Damping Compound is a professional-grade, 29 oz soundproofing solution designed to be applied between two rigid layers like drywall or plywood. Covering 16 square feet per tube, it significantly enhances noise reduction by adding up to 9 STC points, making it a top choice for managers and professionals seeking a quieter, more focused environment. Waterproof and compatible with multiple building materials, it cures fully in 7 days to deliver durable, high-performance sound dampening.

Specifications

ASIN	B07DCZY46W
Best Sellers Rank	#58,934 in Musical Instruments ( See Top 100 in Musical Instruments ) #1,072 in Recording Studio Acoustical Treatments
Brand Name	Green Glue Company
Color	Green
Compatible Material	Drywall, Plywood, Osb, Mdf, Cement Board
Container Type	Tube
Customer Reviews	4.2 4.2 out of 5 stars (62)
Full Cure Time	7 Days
Included Components	1 tube
Item Form	Ounce
Item Package Quantity	1
Item Type Name	Damping compound
Item Weight	16 ounces
Manufacturer	Green Glue
Material Type	Plastic
Model	CMPD_1pk
Number of Pieces	1
Other Special Features of the Product	Soundproofing Damping Compound
Part Number	SG_B07DCZY46W_US
Specific Uses For Product	Wall Repair, Soundproofing
UPC	757347577145
Unit Count	29.0 Ounce
Viscosity Level	Medium to High
Volume	29 Fluid Ounces
Water Resistance Level	Waterproof

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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