Can the heatsinks help cool my raspberry pi 4 from 100°f down to something like 80°f?

You must mean Celsius, not Fahrenheit. And it entirely depends on the situation, your ambient temperature, and how hard the Pi is being used. The only real way to know for your situation is to try it. I'd recommend removing (scraping off) the thermal pad and just using a small amount of thermal paste (about 1/4 of a green pea). I've had no issues with the heatsink sliding off, even mounted vertically.

how strong is the adhesive tape? with heat, will it stay for a long time?

I haven't had one fail yet. Taking them off one raspberry pi 3b+ I was worried it would damage the chip. So the adhesive is pretty strong.

Does this heat sink work on google fiber multi-gig router sfp on 10g port? it is very hot to touch (fiber to 10g ethernet port)

A heat sink should work but I would make sure the case has proper air slow. Get all wires ried for proper.

How hard is it to remove these if needed to?

Unsure. Shouldn't be too hard. Could tear it off pretty cleanly with fingers and use a solvent (isopropyl alcohol or acetone maybe) to squeaky clean the residual adhesive. It's not a super adhesive but fairly tacky. I pulled it off cleanly to rearrange it without problem but with heat and time that could change.

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Pastall 100 PCS (8 Different Sizes) Heatsink Kit with Conductive Adhesive Tape, Aluminum Heat Sinks Cooler and Copper Heat Sink for Raspberry Pi A B B+ 2/3/4/5

Product ID: 188763813

Details

Brand
Pastall
Cooler Heatsink Compatibility
Raspberry Pi
Cooler Heatsink Material
Copper
Item Weight
0.14 Kilograms
Product Dimensions
0.55"L x x

⚡High-performance thermal adhesive

🧊100 PCS multi-size kit

🛠️Universal compatibility

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Description

❄️ Stay Cool, Stay Ahead: The Must-Have Heat Dissipation Kit for Every Tech Pro

STICK CHILL - Premium thermal conductive adhesive tape ensures rock-solid attachment and superior heat dissipation.
VERSATILE TECH SAVIOR - Perfect for Raspberry Pi 1-5, laptops, GPUs, VRAM, and all your DIY electronics cooling needs.
PLUG PLAY EFFICIENCY - Easy installation with panel mount design—upgrade your device’s performance in minutes.
ULTIMATE COOLING ARSENAL - 100-piece heatsink set with 8 sizes for precision fit across all your Raspberry Pi models and more.
COPPER ALUMINUM POWER DUO - 20 copper and 80 aluminum heatsinks combine durability with maximum thermal conductivity.

The Pastall 100 PCS Heatsink Kit offers a comprehensive cooling solution with 8 different sizes of aluminum and copper heatsinks, equipped with high-viscosity thermal adhesive tape. Designed for Raspberry Pi models A through 5 and compatible with a wide range of electronic components, this kit ensures efficient heat dissipation, enhancing device performance and longevity.

Specifications

ASIN	B082RWXFR2
Best Sellers Rank	#6 in Heatsinks
Brand Name	Pastall
Cooler Heatsink Compatibility	Raspberry Pi, Single-board Computers, Electronic Components
Cooler Heatsink Material	Copper
Customer Reviews	4.6 4.6 out of 5 stars (778)
Item Dimensions L x W x H	0.55"L x 0.55"W x 0.27"H
Item Weight	0.14 Kilograms
Manufacturer	Pastall
Model	PT2019080503
Mounting Type	Panel Mount
Part Number	PT2019080503
UPC	779283239918

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