Internet #202531875

Model #RXSS31525

Store SKU #982937

Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (1-Bag)

  • Reduces Sound Tranmissions
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
  • See More Details

Frequently Bought Together


Product Overview

Installing Roxul Safe 'n' Sound insulation inside interior walls, above ceilings is a great way to improve the fire resistance of your home and reduce unwanted noise between rooms. Made from non-combustible stone wool, Roxul Safe 'n' Sound can withstand intense temperatures of up to 2150°F and delays the spread of fire for added safety. Designed with a unique, non-directional high density fiber structure, Roxul Safe 'n' Sound provides a better fit against the studs and an excellent barrier to sound. It is also easy to handle and cut with serrated knife for simple installation around doors, wiring and plumbing. And the combination of its natural composition of basalt rock with recycled content along with its Greenguard gold indoor air quality certification, Roxul Safe 'n' Sound offers you an environmentally friendly choice to help soundproof your next home renovation project.
  • Applications include: basement walls and ceilings, media rooms, home offices, laundry rooms, furnace rooms and bedrooms
  • Roxul is non-combustible and delays the spread of fire between rooms for added safety
  • Easy to cut with a serrated knife to fit around doors, electrical and plumbing
  • Bag covers 59.7 sq. ft.
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Info & Guides

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Coverage Area (Sq.Ft)
Product Length (ft.)
3.91 ft
Product Thickness (in.)
3 in
Product Width (in.)
47 in


Bag Size
4 ft. x 16 in. x 24 in.
Batt/Roll Size
3.91 ft. x 3 in. x 47 in.
Compatible Install Surface
Existing Drywall
Coverage Area per Bag (sq. ft.)
Faced or Unfaced
Insulation Features
Friction Fit,Soundproofing Insulation
Insulation Location
2x4 Wall,Basement,Ceiling Insulation,Ceiling Insulation,Floor
Insulation Type
Mineral Wool Insulation
Number of Bags
Pieces Per Bag
Pieces per Pallet
Product Weight (lb.)
Roll or Batt

Warranty / Certifications

Warranty Information

Questions & Answers


How many are in one bag

Asked by Arash October 20, 2020

Arash each pack covers approx. 60sf..should be marked on the bag

I have a 2x3 wall does this come 2 1/2 in or can compressed to fit

Asked by William September 20, 2020

COMFORTBATT SS 2.5" R10 or AFB 2.5" are other ROCKWOOL options which are available via commercial distribution. email direct to for further details

Can I use safe 'n' sound combined with fiberglass faced insulation on the floor? If yes, which on...

Asked by nnikol August 30, 2020

Sage&Sound goes under your subfloor, in most cases that means you install in from the below storey.

Will this work for generator box interior walls to help with sound absobtion before it escapes?

Asked by Jom August 27, 2020

Yes, it will certainly help reduce noise. I would suggest that you put something up to hold it in place as it will tend to fall apart over time. Staple some plastic or a screen would do. It doesn’t bother your skin at all, which makes it great to work with.

Can i use this on an exterior wall in a bedroom and still be considered insulation?

Asked by Nick August 27, 2020

Its a 3" thickness and will provide approx. R11...…. COMFORTBATT at 3.5" will be R15 and fully fill the 2 x 4 cavity depth which is recommended. Further questions? email us direct and we can address them

Is this product R-15?

Asked by George August 5, 2020

Dear George: Yes. For whatever reason, RockWool doesn't advertise the R-value of the Safe 'n Sound version of their rock wool product -- but it is just as effective for insulation as the standard version. A couple of tips for installation: (1) The fibers are itchy and irritating, like fiberglass. Wear gloves and a good face mask -- NOT the kind with a rubber band in the back. Look for a 3M 07192 respirator online. For large jobs we also wear a cheap tyvek painting suit, so our clothes don't get filled with the fibers. (2) You can hold the batts in place in overhead joist bays with Simpson insulation wire, which Home Depot carries. (3) Safe 'n Sound helps to reduce sound but is not a magical cure-all. If you want to reduce sound in a room, read-up on the Web, e.g. on double walls, double drywall, sealing shared HVAC ducts, etc. I hope this is helpful. Mark

I’m planning to install in the ceiling in unfinished basement. Can I install visqueen as barrier instead of drywall?

Asked by Paul August 3, 2020

SAFEnSOUND or COMFORTBATT options are oversized for either 16" or 24" oc wood or steel stud dimension framing and will have a pressure fit. No need for fasteners. Check if you do not require fire rated drywall for your local code requirement.

Is there acoustic insulation that can be used outside? I would like to line a box that holds a sw...

Asked by Paola August 2, 2020

Note that ROCKWOOL products should not be left exposed to the elements. If this water pump box is sealed from exposure to the elements ROCKWOOL may be an option to review. Note we do not have any specific systems testing for this application

Can this be installed to one exterior wall on new construction I heard it dosen't have R rating but either does aircrete.

Asked by Ampman July 16, 2020

SAFEnSOUND will provide an R3.9 per inch..... we have a STD letterhead available confirming this testing. Note at 3" (Approx R11) it may not be high enough to meet you code requirement. For further response please email direct Also note this is used as an interior batt, pressure fit between wood or steel stud framing members in interior partition walls and floor / ceilings

Could I use this in a window area temporarily to reduce or drown out incoming sound from let’s say... fireworks?

Asked by JohnnyBravo June 21, 2020

Yes, but I would suggest framing the edges with tape. To make mounting & demounting easier. The great thing about this product is that it will not throw off fibers that can irritate skin of people or animals.

Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (1-Bag) - page 2

Customer Reviews

  • 685 Customer Reviews
  • 4.7 out of 5 stars overall
95% of customers recommended.
Overall Ratings
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Used on the "shared" wall of a twin home, it has helped cut down on the noise from next door!
Used on the "shared" wall of a twin home, it has helped cut down on the noise from next door!
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I used this in the floor joists between my kids' playroom and my home office. I'm fairly certain ...
Quality :
Value :
I used this in the floor joists between my kids' playroom and my home office. I'm fairly certain it does nothing to absorb the sound because I can hear my kids talking (and worse, stomping) above. This was used in conjunction with resilient channels and 1/2" drywall.
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Response from Rockwool TeamJune 20, 2019
The product will provide sound dampening in this application. Note that sound will travel through any gap in a wall or floor/ceiling system. If you have hardwood floors, the purpose of the RC Channel when correctly installed will decouple the drywall from the wood framing which will assist with the impact sound you advise. rockwool
Gainesville, FL
Easy to work with
Customer review from logo
I chose safe and sound to insulate our son’s room that we were building. He gets loud when he games online with his friends and we needed sound proofing that was inexpensive and easy to install. I love the product. Very easy to work with which was great because I’m a novice at home renovation.
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Good insulation will recoment
Good insulation will recoment
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This product does not do even close to its 50% rating. You can still hear everything. This is goo...
This product does not do even close to its 50% rating. You can still hear everything. This is good for far away misc. noises.. but conversations, radio playing, tv, and other loud noises - forget about it.. it goes right through. I must have bought $3000 of this product to do (2) apartments.. in the walls, double layered in the floor and ceilings.. it did minimal sound protection from the neighbors next door. It’s a way overpriced product for about 30% of what it claims to do. If you want to soundproof a wall.. stagger the wood party studs, add resilient channels with a rubber backing, use quietrock 530 series ( yes.. the expensive one) laminate it with 5/8” Sheetrock with greenglue compound in between. This is a severely overpriced product!!
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Response from Rockwool TeamJune 26, 2019
Hello 'cedo' - Please check out this guide that talks about typical assemblies and the sound transmission class when installed correctly as pictured rockwool
Works GREAT, totally keeps sound out, of course if you knock on the wall you're going to hear tha...
Works GREAT, totally keeps sound out, of course if you knock on the wall you're going to hear that. I used it in the bathroom to keep embarrassing "bathroom" sounds from escaping thru to a common area. It's easier to install than fiberglass because its stiffer and easier to cut and shape by using just a bread knife or maybe even a serrated steak knife. It is a lot more itchy than fiberglass so use long a sleeve shirt, gloves and also a mask as there are rock particles that come off of it while installing and cutting. I don't like how its described on the website, it should say that there are 12 bats of 3"x15 1/4 x 47" or a total of 564" or 47 feet of length. It seems really expensive when you just say that its 3x15 1/4 x 47" for around $50 (seems like its for only one piece) which almost deterred my from purchasing it.
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Sellersburg, IN
Great Purchase and Easy Install!
Customer review from logo
Wow! I purchased 30 bags of the ROCKWOOL Safe 'n' Sound and was able to install it all by myself. I calculated that many bags on Rockwool's bag calculator on their website! Very accurate.. This product was very easy to install. Cutting around outlets, wires, and pipes was like cutting bread. Before the drywall went up, I could already tell a difference. I put the Safe 'n' Sound around all my laundry room, bathrooms, bedrooms, and in the basement ceiling. Not only does it provide sound proofing, it has other benefits as well. Such as fire resistant and no mildew can grow on it. I am so glad my builder let me install this product on my own. Would I recommend this product? Yes, 100%.
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Exactly the product we wanted and needed!
Customer review from logo
We are renovating a 110-year-old stone carriage house. Rockwool has been our salvation for many reasons: exceptional thermal efficiency, super sound blocking, and mice hate it! Easy to install. We wrapped our new enameled steel tub with Rockwool for added insulation; my love of hot baths appreciates the extra 30 minutes I can spend reading in my tub before bed! And best of all, it has a low carbon footprint. Everything to gain when we opted for Rockwool instead of the irritating pink fluff.
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Having to build the wall and adding the roxul plus, sheetrock wasn't worth the cost, labor or the...
Having to build the wall and adding the roxul plus, sheetrock wasn't worth the cost, labor or the slight reduction in sound. I never knew people could use so many cuss words at their children. Really disturbing!
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Works amazing for muffling sounds. With big loud dogs now there's no vibration and it blocks pret...
Works amazing for muffling sounds. With big loud dogs now there's no vibration and it blocks pretty much every possible sound. Because it is a remodel, the rockwall is sitting on top of the ceiling of the basement, instead of staying in between the joists, but it works just as well. Wish I used it on all walls I ever worked on. Would highly recommend it around bathrooms or in between bedrooms.
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