Could this be used along the bottom of bi-fold doors

no you will need to use a DPC Membrane underneath the Cill Section . This is used on top and possibly the sides to stop the thermal bridge between the steel and aluminium frameworks .

Could this be used to line the inside of a toilet tank?

Simple answer is I don't know but if the tank was clean & dry before you apply it then I don't see why not but don't know why you would want to.

Does this reduce outside noise?

I have this on a 5.5m insulated roller door which is 15 years old and has a "tiered" rubber seal at the bottom and in part it was to help with noise reduction. It has reduced the wind noise that used to come under the door a little and made it more comfortable in winter but unless you have a large gap I don't think the noise reduction will be significant. We did add a plastic curtain made from overlapping strips and that was far more effective on the noise reduction stake and both work well together in providing an insulating layer to keep heat in and noise out

what material is the foam?

It seems to be black polmer foam of ethylene propylene diene monomer

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fowong Self-Adhesive Foam Tape 5M Long X 50 mm Wide x 3 mm Thick High Density Neoprene,Anti-Vibration,Anti-Collision Weather Stripping Gasket Seal SoundProof for Window Door

fowong Self-Adhesive Foam Tape 5M Long X 50 mm Wide x 3 mm Thick High Density Neoprene,Anti-Vibration,Anti-Collision Weather Stripping Gasket Seal SoundProof for Window Door

Product ID: 168562660

Details

Brand
fowong
Colour
Black Foam
Item thickness
3 Millimetres
Material
Foam
Product dimensions
5L x 0.05W

🧱50mm wide for full coverage

🛠️5M length for versatile use

🛡️3mm thick high-density neoprene

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MX$1054

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Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal the deal, silence the noise, and upgrade your space effortlessly!

COMPACT CONVENIENT - Resealable packaging keeps your tape fresh for multiple projects.
MULTI PURPOSE MASTERY - Perfect for doors, windows, cars, speakers, and even marine gear—one tape, endless solutions.
ALL WEATHER RESILIENCE - Weatherproof, oil-resistant, and corrosion-proof for year-round protection.
EFFORTLESS INSTALLATION - Peel, stick, and cut to size—no tools, no hassle, just instant sealing.
UNMATCHED ADHESION POWER - Strong grid adhesive ensures a firm, long-lasting seal—no peeling, no worries.

The fowong Self-Adhesive Foam Tape is a 5-meter long, 50mm wide, and 3mm thick high-density neoprene strip designed for superior sealing and soundproofing. Featuring a strong adhesive backing, it offers excellent weather, oil, and corrosion resistance, making it ideal for doors, windows, vehicles, and more. Easy to install without tools and stored in a resealable bag, it delivers durable protection against vibration, dust, and noise.

Specifications

ASIN	B07VDR36D5
Best Sellers Rank	8,174 in DIY & Tools ( See Top 100 in DIY & Tools ) 14 in Weather Stripping
Brand	fowong
Colour	Black Foam With Yellow Back
Country of Origin	China
Customer Reviews	4.3 4.3 out of 5 stars (1,210)
Item Dimensions L x W	5L x 0.05W metres
Item Thickness	3 Millimetres
Manufacturer	fowong
Material	Foam
Number of Items	1
Recommended Uses For Product	Door, Electrical cabinets, Window
UPC	653846957191
Unit Count	5 meter

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MX$1054

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In stock

Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Mexico.

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