is this the same as Muc Off tubless sealant?

I don’t know. I used it with tubes.

Can I use this on 26x4 fat tire innertubes

sure but just buy enough for 4" wide tires

Does it stop slow leaks from bikes siting in a garage and air leaks eventually

Inner tubes as well as tubless setup all lose air. Thick, heavy inner-tubes seem to hold air longer. They are heavy and usually only found with Shrader valves. Newer butyl rubber tubes lose air and need top off every few days. Muc-off no puncture sealant is great for sealing punctures. They will still lose air pressure and need filled. As far as a bike in storage they too will lose air. The sealant needs circulated within tube as with tubless setup to seal any leak. Static air loss is part of cycling. Muc-off no hassle inner tube sealant is definitely part of keeping you rolling when a puncture occurs.

Does it come with the applicator/syringe?

Yes it comes with a built in tube that you pull out.

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Muc-Off 20216 No Puncture Hassle Inner Tube Sealant, 300 Millilitres - Advanced Bicycle Tyre Sealant For Repairing Inner Tube Punctures Of Up To 4mm

Product ID: 331412481

Details

Brand
Muc-Off
Item dimensions L x W x H
6.7 x 6.7 x 18
Material
Polyester
Style
Single
Water resistance level
Water

⏳One application lasts entire tube life

🌡️Works from -15°C to +50°C

🚴‍♂️Seals punctures up to 4mm

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COP 225746

Duties & taxes included

In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚴‍♀️ Seal the deal, ditch the flats—ride fearless every mile!

ALL WEATHER WARRIOR - Engineered to perform flawlessly from freezing cold to scorching heat (-15°C to +50°C).
SET IT AND FORGET IT - One application lasts the entire life of your inner tube—no messy reapplications needed.
VERSATILE SIZE OPTIONS - Choose the perfect 300ml bottle for daily commutes or upgrade to a litre for family-wide protection.
EFFORTLESS INSTALLATION - Comes with a handy filling tube and dosage chart for quick, mess-free application via removable valve cores.
PUNCTURE PROOF YOUR RIDE - Advanced molecules seal holes up to 4mm instantly, keeping you rolling without interruptions.

Muc-Off No Puncture Hassle Inner Tube Sealant is a lightweight, water-based formula designed to instantly seal punctures up to 4mm in inner tubes with removable valve cores. Compatible with MTB, road, eBike, and commuter bikes, it lasts the entire tube lifespan, works in extreme temperatures, and is easy to apply with the included filling tube. Perfect for professionals and enthusiasts who demand uninterrupted rides.

Specifications

ASIN	B089WK61JZ
Best Sellers Rank	#30,182 in Sporting Goods ( See Top 100 in Sporting Goods ) #58 in Bike Tire Repair Kits
Brand Name	Muc-Off
Color	Pink
Compatible Material	Metal
Customer Reviews	4.3 4.3 out of 5 stars (848)
Global Trade Identification Number	05037835206746
Included Components	1 x Inner Tube Sealant
Item Dimensions	6.7 x 6.7 x 18 centimeters
Item Form	Liquid
Item Type Name	Muc-Off No Puncture Hassle Inner Tube Sealant, 300 Millilitres - Advanced Bicycle Tyre Sealant For Repairing Inner Tube Punctures Of Up To 4mm
Manufacturer	Muc-Off
Material Type	Polyester
Model	20216
Number of Items	1
Part Number	20216
Style Name	Single
Surface Recommendation	Metal
Unit Count	300 Milliliters
Water Resistance Level	Water Resistant

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