will this unstick in the heat?

I would say no....but never tried it.

can this be applied to a patch to make it an iron on patch?

In theory, if the stuff works properly, then yes, but it wouldn’t bond my light weight materia (flour sack towels) so I wouldn’t trust it to hold a patch on.

Can it be used to fix a tear on a sweater?

This is a double-sided adhesive. (Think of it like a REALLY strong double-sided tape that requires heat to bond.) Typically for tears, you would use this if you want to patch the tear with fabric (and this can be used as the adhesive for that fabric patch.) It shouldn't be used alone on a tear since it's double-sided. The HeatnBond UltraHold is a no sew product so you would only want to use this on a heavier weight fabric that you do not plan to sew.

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HeatnBond UltraHold Iron-On Adhesive, 3/8 Inch x 10 Yards

HeatnBond UltraHold Iron-On Adhesive, 3/8 Inch x 10 Yards

Product ID: 306763356

Details

Brand
HeatnBond
Colour
white
Material
Plastic
Number of Items
1
Recommended uses for product
Arts And Craft

📏3/8 inch precision width

🔥Ultra-strong heat-activated bond

🧵Double-sided adhesive for seamless fabric fusion

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VT5948

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stick with the best—no sewing, all style!

PRECISION PERFECT - 3/8 inch width ensures exact application for delicate ribbons and trims.
MADE IN THE USA QUALITY - Crafted domestically for trusted reliability and superior performance.
EFFORTLESS FABRIC FUSION - Say goodbye to pins and needles—bond trims and lace instantly with heat activation.
PERMANENT HOLD NO SEWING - Enjoy a durable, long-lasting bond that keeps your fabric creations intact without stitching.
DOUBLE SIDED ADHESIVE POWER - Solid film adhesive on both sides guarantees a flawless, mess-free finish every time.

HeatnBond UltraHold Iron-On Adhesive is a 3/8 inch by 10-yard double-sided heat-activated bonding tape designed for light to medium weight fabrics like ribbons and lace. It provides a permanent, sewing-free hold, making fabric crafting faster and cleaner. Made in the USA for quality assurance.

Specifications

ASIN	B00114LZX0
Adhesive Format	roll
Adhesive Location	on paper
Adhesive Side Count	2
Best Sellers Rank	#76,680 in Office Products ( See Top 100 in Office Products ) #118 in Fabric Adhesives
Brand Name	HeatnBond
Color	white
Compatible Material	Plastic
Customer Reviews	5.0 5.0 out of 5 stars (1)
Global Trade Identification Number	00000943038108
Included Components	Heatnbond UltraHold Iron-On Adhesive, 3/8 Inch x 10 yards
Item Dimensions L x W x Thickness	9.14L x 0.1W x 0.01Th Meters
Item Resistance	Durable
Item Thickness	9.53 Millimeters
Item Type Name	iron-on adhesive
Item Weight	0.01 Ounces
Manufacturer	Therm O Web
Material Type	Plastic
Model	3509.38
Number of Items	1
Other Special Features of the Product	Permanent
Part Number	3509-38
Recommended Uses For Product	Arts And Craft, Sewing
Size Name	3.8 inches x 1 inch x 5.4 inches
Surface Recommendation	Leather
UPC	000058656426 000943038108
Unit Count	30 Meters
Water Resistance Level	Not Water Resistant

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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