Can this safely be applied directly to the outside of a heating duct? If so how, just tape?

You can use mass loaded vinyl on the outside of SOME heating ducts. But you need to be sure that the heat level is not too high for the material. Assuming this is not a high-heat application, I'd actually recommend you go with our Luxury Liner Pro product. It comes with a fused closed-cell foam decoupling layer that allows the MLV to "float" off the duct. This creates a double wall effect and improves performance. Wrap the Luxury Liner Pro around the duct. Hold it in place with mechanical fasteners every few feet. Wrap the entire thing in foil tape.

Is this 1lb/ sq ft? Is it reinforced?

This listing is for the 1/4" 2lb per sqft option. We sell it in 1lb per sqft also. The tensile strength of either option is 600 PSI.

Yup. Luxury Liner is typically cut with a sharp utility knife.

how do you mount this to an apartment wall?

Normally it goes under the drywall, directly over the studs. But in buildings that are more restrictive of construction add ons, you would need to apply it on the wall with bolts with large washers that are drilled into the studs through the drywall. It is used on the walls between you and the noise and needs to be in full coverage across the wall to perform best.

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Description

🔇 Silence is the new luxury — block noise like a pro!

FLEXIBLE YET DENSE - Barium-infused vinyl offers superior density without sacrificing flexibility—bend it, don’t break it.
FIRE SAFE ODOR FREE - Meets FMVSS 302 fire safety standards with zero odor, ensuring a safe and comfortable environment.
WALL LEVEL NOISE BLOCKER - STC 32 rating means it’s as effective as your home’s walls at silencing airborne noise.
VERSATILE INSTALLATION OPTIONS - Staple, screw, nail, or use premium adhesives for airtight, gap-free soundproofing coverage.
PRECISION PRECUT FOR SMALL PROJECTS - Sized at 24" x 54" (9 sq ft) for easy installation in automotive, generator enclosures, and HVAC applications.

Second Skin Luxury Liner is a 2 lb per square foot, 1/4 inch thick mass loaded vinyl sound barrier designed for high-performance noise blocking in small-scale projects. With an STC rating of 32, it matches the soundproofing power of a typical wall, while remaining flexible and fire-tested to FMVSS 302 standards. Proudly made in the USA, this odorless, barium-infused vinyl sheet is perfect for automotive, generator, and HVAC noise control, offering multiple installation methods for airtight coverage.

Specifications

Item Thickness	0.25 Inches
UPC	731236583318
Manufacturer	Second Skin Audio
Model	1LL-2lb
Item Weight	13.02 pounds
Product Dimensions	54 x 24 x 0.04 inches
Item model number	1LL-2lb
Manufacturer Part Number	1LL-2lb
Special Features	HEALTH & SAFETY: Manufactured from PVC vinyl compounded with inert materials to increase density and provide superior flame and smoke resistance. NO ODOR! Meets federal fire safety standards (FMVSS 302)., HIGH DENSITY ACOUSTICAL BARRIER: Despite its density, this MLV maintains its flexibility and can withstand significant bending. 2 lb MLV is recommended for flatter automotive surfaces (floor pan, trunk) where significant noise is present or home/commercial applications. Use a soft decoupling material for automotive use., MASS LOADED VINYL: Luxury Liner 2 lb is a black, 1/4 inch thick MLV noise barrier designed to block out unwanted noises and ideally sized for smaller projects (automotive, generator box, cabinets, HVAC). It's twice as thick as 1 lb MLV., MLV SOUNDPROOFING: Each pre-cut sheet of Luxury Liner MLV is 24" x 54" (9 square feet) and weighs 2 lbs per square foot. Each MLV sheet weighs about 18 lbs and has an STC rating of 32, equivalent to a wall in your house., PROUDLY manufactured in the USA

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