what is this product's thermal conductivity (W/mK)?

I don't know actually. it looks to be 0.5 to 0.6 W/mK !

Is this ok to use around a heat sensor in a boiler

No it’s for clickson disk thermostats the little round ones with two circuit wires or boiler copper wired phials old type which insert into heat exchangers, This compound makes the thermostat more conductive to its chassis making it temp accurate Ps...you will see if heat sink has been used on thermostats By boiler manufacturers from the factory it’s normally dried out. Hope this helps . Regards.

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Regin REG-Z20 Compound Heat Sink

Product ID: 56460851

Details

Brand
Regin
Cooler heat sink material
Aluminium
Cooler heatsink compatibility
Universal
Item weight
25 Grams
Mounting type
Clamp-on Mount

🔥Even heat dissipation at probe

⚙️High thermal stability silicone

🌡️Wide temp range -50°C to 200°C

€ 23.14

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Description

🔥 Stay cool under pressure with Regin REG-Z20 – the heat sink compound pros trust!

COMPACT EFFICIENT - 25g tube delivers long-lasting, professional-grade thermal compound
UNIVERSAL COMPATIBILITY - Fits clamp-on and dry pocket boiler overheat thermostats effortlessly
ULTIMATE THERMAL CONTROL - Maintains optimal heat sink seal for peak performance
PRECISION HEAT DISSIPATION - Ensures even heat spread for reliable thermostat function
BROAD TEMPERATURE RESILIENCE - Operates flawlessly from freezing -50°C to scorching 200°C

Regin REG-Z20 is a 25g high thermal stability silicone heat sink compound designed for clamp-on and dry pocket boiler overheat thermostats. It operates effectively across a wide temperature range (-50°C to 200°C), ensuring even heat dissipation and maintaining a positive heat sink seal for reliable thermal management.

Specifications

ASIN	B00PDFDUGI
Best Sellers Rank	269,813 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,395 in Central Heating System Accessories
Brand	Regin
Cooler Heatsink Compatibility	Universal
Cooler Heatsink Material	Aluminium
Customer Reviews	4.7 4.7 out of 5 stars (25)
Global Trade Identification Number	05060026572795
Item Type Name	Heat Sink Compound
Item Weight	25 Grams
Manufacturer	Regin
Manufacturer Part Number	REG-Z20
Model Number	REG-Z20
Mounting Type	Clamp-on Mount
Number of Items	1
Number of Packs	1
Unit Count	1.0 count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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€ 23.14

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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