Reddit mentions: The best foam raw materials
We found 21 Reddit comments discussing the best foam raw materials. We ran sentiment analysis on each of these comments to determine how redditors feel about different products. We found 11 products and ranked them based on the amount of positive reactions they received. Here are the top 20.
1. Closed Cell Sponge Rubber Acoustical Foam Sheet 3/4" x 46" x 20" (Grey)
- Useful in a a variety of applications, home, automotive, industrial
- High-density decouples vibration and absorbs sound.
- High quality finish and easily cut to fit any configuration.
- Stack to increase efficiency. Neutral Grey Color.
- Use our Herco Neoprene Contact Adhesive to attach to surfaces.
Features:
Specs:
| Color | Grey |
| Height | 0.75 Inches |
| Length | 41 Inches |
| Number of items | 1 |
| Width | 46 Inches |
2. XCEL Value Pack, Closed Cell Foam Rubber Antivibration, Acoustic Damper 6" X 6" Pad 8 Pieces, Made in USA
PRODUCT FEATURES - XCEL's rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. Comes as an 8 Pack of 6 in. x 6 in. square pieces, 1/4 in. thickRUBBER PADDING - Rubber pads are a versatile product that can be used for...
Specs:
3. MAGZO Foam Rubber Sheet Rolls, 1/16 Inch Thickness x 12 Inch Width x 4.9 Feet Length Closed Cell Neoprene Rubber with Adhesive Soundproof Padding，Soft/Medium Hardness - Freely Customizable
Foam rubber sheet is water resistant, flame retardant, oil resistant and chemical resistant. Widely used in laboratories and factories.Neoprene foam has the characteristics of shockproof and shock absorption. Used in audio, electrical appliances, 3C, toys, alcohol, glass, etc., for their packaging l...
Specs:
| Color | Black |
| Number of items | 0 |
| Size | 1/16in *12in * 4.9FT |
4. XCEL Foam Rubber Padding 16-Piece Acoustic Damper Anti-Vibration Closed-Cell Pads w/Adhesive, 3"x3"x1/4"
- PRODUCT FEATURES - XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement in appliances and speakers alike. They are easy to cut into different shapes and sizes for any application. Adhesive is provided on each pad for easy applications no matter where you need. These durable rubber pads come pre-cut in 3 in. x 3 in. square pieces, 1/4 in. thick with adhesive on the back of each, ready for a wide variety of uses around the home.
- FURNITURE PAD - Tired of couches and chairs sliding around and scratching your floors? Our rubber floor mats are perfect for keeping your furniture in place and your floor in pristine condition. Using skid-proof shock absorbent rubber, our floor pads are designed to provide for a durable support for your couches, beds and desks.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 16 |
| Size | 3 in x 3 in x 1/4 in (Adhesive 16 Pack) |
5. XCEL Value Pack, Neoprene Foam Anti Vibration Pads with Adhesive 6" X 6" X 1/4", Made in USA (8 Pieces)
PRODUCT FEATURES - Top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others on the market) and a pressure sensitive adhesive on one side.XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement. The rubber...
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 8 |
| Size | 6 in x 6 in x 1/4 in (Adhesive 8 Pack) |
6. XCEL 4-Piece Sponge Neoprene Rubber Foam Anti-Vibration Pads w/Adhesive 9 in. x 9 in. x 1/4 in.
- PRODUCT FEATURES - The top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others) and a pressure sensitive adhesive on one side. Use them to help prevent scratching and marring of hardwood floors, under kitchen appliances or exercise machines to help keep them in place and protect surfaces and to absorb vibration, cutting down on noise. XCEL's rubber pads are easy to cut. 4-Pack of 9 in. x 9 in. square pieces, 1/4 in. thick.
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics, our rubber pads will meet your needs. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 4 |
| Size | 9 in x 9 in x 1/4 in (Adhesive 4 Pack) |
7. XCEL Neoprene Foam AntiVibration Pads with Adhesive 3 in X 3 in X 1/8 in (16 Pieces)
- PRODUCT FEATURES - Top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others on the market) and a pressure sensitive adhesive on one side. XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement. The rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. DIMENSIONS - 16-Pack of 3 in. x 3 in. square pieces, 1/8 in. thick
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics. Thick and solid pads suitable for good shock absorbing abilities and can reduce noise well. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Number of items | 16 |
| Size | 3 in x 3 in x 1/8 in (Adhesive 16 Pack) |
8. XCEL Closed Cell Foam Rubber Antivibration, Acoustic Damper 3" X 3" Furniture Pad 16 Pieces
- PRODUCT FEATURES - Made of closed-cell foam rubber, these pads are naturally non-absorbent and incredibly strong, making them durable enough for any job around the house or shop.XCEL's rubber padding works great as DIY furniture pads. XCEL's rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. The is a 16 Pack of 3 in. x 3 in. square pieces, 1/4 in. thick.
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics, Thick and solid pads suitable for good shock absorbing abilities and can reduce noise well.. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads |
| Number of items | 16 |
| Size | 3 in x 3 in x 1/4 in (16 Pack) |
| Weight | 0.15 Pounds |
9. SUNDELY Sound Proofing Deadening Vehicle Insulation Closed Cell Foam Sheet with Adhesive Backing (50cmX30cm / 19.7"X11.8", 6 Pieces)
Sound Proofing Deadening Vehicle Insulation Closed Cell Foam Sheet with Adhesive Backing6 pieces in this offer, Size: 50cm x 30cm (19.7" X 11.8"), Area: 0.9m² (9.6ft²), Nominal Thickness: 10mmTypical Temperature Stability: -40°C to +100°CSound deadening and thermal insulation foam for use within...
Specs:
| Number of items | 6 |
10. XCEL Closed Cell Sponge Rubber Pads, Various Sizes to Choose from
Specs:
| Is adult product | 1 |
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Summary
1. Closed Cell Sponge Rubber Acoustical Foam Sheet 3/4" x 46" x 20" (Grey)
- Useful in a a variety of applications, home, automotive, industrial
- High-density decouples vibration and absorbs sound.
- High quality finish and easily cut to fit any configuration.
- Stack to increase efficiency. Neutral Grey Color.
- Use our Herco Neoprene Contact Adhesive to attach to surfaces.
Features:
Specs:
| Color | Grey |
| Height | 0.75 Inches |
| Length | 41 Inches |
| Number of items | 1 |
| Width | 46 Inches |
2. XCEL Value Pack, Closed Cell Foam Rubber Antivibration, Acoustic Damper 6" X 6" Pad 8 Pieces, Made in USA
PRODUCT FEATURES - XCEL's rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. Comes as an 8 Pack of 6 in. x 6 in. square pieces, 1/4 in. thickRUBBER PADDING - Rubber pads are a versatile product that can be used for...
Specs:
3. MAGZO Foam Rubber Sheet Rolls, 1/16 Inch Thickness x 12 Inch Width x 4.9 Feet Length Closed Cell Neoprene Rubber with Adhesive Soundproof Padding，Soft/Medium Hardness - Freely Customizable
Foam rubber sheet is water resistant, flame retardant, oil resistant and chemical resistant. Widely used in laboratories and factories.Neoprene foam has the characteristics of shockproof and shock absorption. Used in audio, electrical appliances, 3C, toys, alcohol, glass, etc., for their packaging l...
Specs:
| Color | Black |
| Number of items | 0 |
| Size | 1/16in *12in * 4.9FT |
4. XCEL Foam Rubber Padding 16-Piece Acoustic Damper Anti-Vibration Closed-Cell Pads w/Adhesive, 3"x3"x1/4"
- PRODUCT FEATURES - XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement in appliances and speakers alike. They are easy to cut into different shapes and sizes for any application. Adhesive is provided on each pad for easy applications no matter where you need. These durable rubber pads come pre-cut in 3 in. x 3 in. square pieces, 1/4 in. thick with adhesive on the back of each, ready for a wide variety of uses around the home.
- FURNITURE PAD - Tired of couches and chairs sliding around and scratching your floors? Our rubber floor mats are perfect for keeping your furniture in place and your floor in pristine condition. Using skid-proof shock absorbent rubber, our floor pads are designed to provide for a durable support for your couches, beds and desks.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 16 |
| Size | 3 in x 3 in x 1/4 in (Adhesive 16 Pack) |
5. XCEL Value Pack, Neoprene Foam Anti Vibration Pads with Adhesive 6" X 6" X 1/4", Made in USA (8 Pieces)
PRODUCT FEATURES - Top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others on the market) and a pressure sensitive adhesive on one side.XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement. The rubber...
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 8 |
| Size | 6 in x 6 in x 1/4 in (Adhesive 8 Pack) |
6. XCEL 4-Piece Sponge Neoprene Rubber Foam Anti-Vibration Pads w/Adhesive 9 in. x 9 in. x 1/4 in.
- PRODUCT FEATURES - The top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others) and a pressure sensitive adhesive on one side. Use them to help prevent scratching and marring of hardwood floors, under kitchen appliances or exercise machines to help keep them in place and protect surfaces and to absorb vibration, cutting down on noise. XCEL's rubber pads are easy to cut. 4-Pack of 9 in. x 9 in. square pieces, 1/4 in. thick.
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics, our rubber pads will meet your needs. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads with Adhesive |
| Number of items | 4 |
| Size | 9 in x 9 in x 1/4 in (Adhesive 4 Pack) |
7. XCEL Neoprene Foam AntiVibration Pads with Adhesive 3 in X 3 in X 1/8 in (16 Pieces)
- PRODUCT FEATURES - Top quality neoprene based rubber featuring a tensile strength of 50 PSI (making it stronger than many others on the market) and a pressure sensitive adhesive on one side. XCEL's rubber mats are designed to absorb vibration, cutting down on noise and preventing movement. The rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. DIMENSIONS - 16-Pack of 3 in. x 3 in. square pieces, 1/8 in. thick
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics. Thick and solid pads suitable for good shock absorbing abilities and can reduce noise well. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Number of items | 16 |
| Size | 3 in x 3 in x 1/8 in (Adhesive 16 Pack) |
8. XCEL Closed Cell Foam Rubber Antivibration, Acoustic Damper 3" X 3" Furniture Pad 16 Pieces
- PRODUCT FEATURES - Made of closed-cell foam rubber, these pads are naturally non-absorbent and incredibly strong, making them durable enough for any job around the house or shop.XCEL's rubber padding works great as DIY furniture pads. XCEL's rubber pads are easy to cut into different shapes and sizes for any application - just use scissors or a razor to trim to a perfect fit. The is a 16 Pack of 3 in. x 3 in. square pieces, 1/4 in. thick.
- RUBBER PADDING - Rubber pads are a versatile product that can be used for any number of projects or items. From keeping your floor safe from scratching, to protecting your electronics, Thick and solid pads suitable for good shock absorbing abilities and can reduce noise well.. Our pads are made from industrial grade rubber, that is sure to withstand the test of time and take on heavy weight capacities.
- QUALITY AND COMFORT - Here at XCEL, we are focused on providing you with the best rubber products to make your life easier. Using industrial grade materials, we are consistently pushing to make products that improve the quality of any situation. From our anti-fatigue mats, to our rubber floor tiles, we want you to experience the comfort you deserve, with the peace of mind knowing that what you get is expertly crafted and long-lasting.
- AMERICAN MADE - XCEL is a small, private company based in the United States and we are dedicated to providing our customers with top quality, American made goods. All of our products are made using only the best materials found here in the United States. We believe in staying true to our roots and supporting the country we were raised in.
Features:
Specs:
| Color | Rubber Pads |
| Number of items | 16 |
| Size | 3 in x 3 in x 1/4 in (16 Pack) |
| Weight | 0.15 Pounds |
9. SUNDELY Sound Proofing Deadening Vehicle Insulation Closed Cell Foam Sheet with Adhesive Backing (50cmX30cm / 19.7"X11.8", 6 Pieces)
Sound Proofing Deadening Vehicle Insulation Closed Cell Foam Sheet with Adhesive Backing6 pieces in this offer, Size: 50cm x 30cm (19.7" X 11.8"), Area: 0.9m² (9.6ft²), Nominal Thickness: 10mmTypical Temperature Stability: -40°C to +100°CSound deadening and thermal insulation foam for use within...
Specs:
| Number of items | 6 |
10. XCEL Closed Cell Sponge Rubber Pads, Various Sizes to Choose from
Specs:
| Is adult product | 1 |
I checked all links but unfortunately, no :(
The Soft Charcoal one is almost the same as the packaging foam stuff. It's harder to see on your link but on the edges you can see you can kinda look through it, that's just feather light stuff like this https://www.casesbysource.com/product/soft-charcoal-ester-pick-and-pluck-foam-2-pack-fs04
And this link you gave me: https://www.amazon.com/Closed-Sponge-Rubber-Acoustical-Sheet/dp/B00YV43UZS this foam is something completely different, it's this type of foam you find in sofas or cheap chairs \^\^
The thing with the neoprene could actually be it but I think only as a tiny tiny blend type and I actually found something which has neoprene, SBR and a closed cell foam mixed together and on the first picture.. again(-.-) it looks quite like my pad. God dammit haha http://www.rubbercal.com/closed-cell-rubber-blend.html But their sizes and prices are also obnoxious. The thing is my pad can't be pure neoprene or be a high neoprene base because my pad as I tried to clean it with water (after almost 10 years I fucked it up with a shake .....) it soak the water a tiny bit but still felt like a plastic-like foam type (a bit like my EVA mat) with a bit rubber in it. so I guess it's also not fully closed cell that is even can soak water even tho it feels like that. Just picking something blind on the internet because of a picture where the foam looks pretty much like my pad is too randoms >.> I wish I had a shop near me that just have all sorts of foam and where I could bring my pad and ask some professionals what exactly it is lol
Edit: I did wet a corner of this violet EVA I have at home and surprisingly it soaks the water, feels and sounds exactly the same as my pad, a bit squeaky, like plastic when wet, when I rub on it with a finger.. I'm pretty sure now my pad has to be like a 80-90%+ EVA base!! The surface and maybe density is just a bit different. I think I'll search some different EVA mats up and try some
Ok, True, Yea i saw tons of pure rubber ones but they are not it. I'm gonna link some for you to look through :), Hope this helps!
https://www.ebay.com/itm/Large-Foam-Sheets-27-x-38-x-1-4-CHARCOAL-GRAY-/132119812051
https://www.ebay.com/itm/1x-Recycled-foam-packing-block-shipping-gray-medium-high-density-5-5x12-thick-1-/302046943784
https://www.casesbysource.com/product/soft-charcoal-ester-foam-sheet-2lb-dens-fspu
https://www.amazon.com/Closed-Sponge-Rubber-Acoustical-Sheet/dp/B00YV43UZS
https://www.mscdirect.com/product/details/31943210
https://www.mscdirect.com/product/details/31939564
https://www.mscdirect.com/product/details/31939655
Some of these seem too small but i think some of these might be it, I think the MScDirect ones seem like they could be close, Thanks for that picture, I'm pretty sure this is the closest
https://www.mscdirect.com/product/details/31943210
​
Awesome. Thanks. I'm pretty motivated. You think felt is the way to go? Or something like this?
Hopefully your classroom is pretty spacious so you can get some distance from everybody. Even with silent switches, a stock Anne Pro will be pretty noticeable in a classroom. You could pop the case open and put some foam in there which would get it quieter.
Regardless, Anne Pros are a great entry board even if you don't end up using them in class!
I used several shaped layers of adhesive neoprene on my LightTuck. It’s super comfortable and it rounds out pretty quickly.
That looks great!
I'd recommend adding some type of dense foam rubber padding between the speaker and the stand. Like this neoprene pad:
https://www.amazon.com/dp/B07CJFQ6F9/ref=sspa_dk_detail_4?psc=1&pd_rd_i=B07CJFQ6F9
Just cut it to the right proportions.
​
​
Got these off Amazon. They aren’t perfect by any means but I think they help.
XCEL Foam Rubber Padding - 16-Piece Acoustic Damper Anti-Vibration Closed-Cell Pads w/ Adhesive, 3"x3"x1/4" https://www.amazon.com/dp/B07483R2GF?ref=yo_pop_ma_swf
https://www.amazon.com/8-Piece-Sponge-Neoprene-Anti-Vibration-Adhesive/dp/B071GD8TG9/
I wonder if adding weight to it on a wood floor is wise. If so I think that some kind of platform to distribute the weight load would help to prevent sagging.
Something that might help is vibration pads like these. They are real cheap and putting some under my speakers and turntable helped with the sound a lot.
I was looking at this one: https://www.amazon.com/gp/product/B07483R2GF/ref=ox_sc_act_title_1?smid=A1FGUTU6HPYGGA&psc=1
Would it work as well as the sorbothane or the dynamat? Its a lot cheaper than this:
https://www.amazon.com/Noico-deadening-Automotive-Insulation-dampening/dp/B01KZ5X7KO/ref=sr_1_2_sspa?keywords=dynamat&qid=1557676924&s=gateway&sr=8-2-spons&psc=1
These neoprene pads should work, I use the precut discs in various sizes from Home Depot meant for the bottom of furniture and the like.
This stuff works well
XCEL Foam Rubber Padding - 16-Piece Acoustic Damper Anti-Vibration Closed-Cell Pads w/ Adhesive, 3"x3"x1/4" https://www.amazon.com/dp/B07483R2GF?ref=yo_pop_ma_swf
I took the feet off my Prusa and set the entire frame on strips of this
Dampens vibrations, very quiet, unsure if it improved my prints
I was thinking more of this:
https://www.amazon.com/XCEL-Foam-Rubber-Padding-Anti-Vibration/dp/B074829BP6/ref=sr_1_14?ie=UTF8&qid=1510791773&sr=8-14&keywords=acoustic+pads
XCEL Neoprene Foam AntiVibration Pads with Adhesive 3 in X 3 in X 1/8 in (16 Pieces) https://www.amazon.com/dp/B07KYQF9GZ/ref=cm_sw_r_cp_apa_i_z9GvDbH6YEQPA
I think i used this for the deadening. And something like this as the foam. Wasn't exactly that but you can shop around.
The first is to deaden sound. Stop the drone and metal vibrating. Foam is to cut sound and make it quieter. See how you like the sound with nothing first and then add.
I put mine on right away because the gf didnt like the cabin drone.
Well it's not quiet to be honest but you'll have a hard time dampening the noise no matter how you go about it, I do recommend getting vibration dampening cube thingies (like this or maybe this) to put under your rig just so the noise won't travel into the floor which will make it exponentially louder. Those anti vibration things also help keep the vibration in the rig rather than dispersing it into your surrounding area.
As for structural integrity, I've had no issues. I got a tube of threadlocker in case the screws would vibrate loose but I haven't put it on yet and they are still as tight as the day I put them in so I wouldn't worry too much.
The "left joycon issue" is a multitude of problems caused by interference with the controllers wireless antenna. It can manifest it self in different ways for different people. The firmware update increasing its power usage helped a little bit.
But if its still bothering you can send it to nintendo for repair, or you can fix it yourself with a small piece of conductive foam.
which is basically the same repair nintendo makes.