Can this be used to lube keyboard switches?

yes this is pretty popular lube for stabs and switches

Can this be used on UK domestic 240v mains connections?

I'm not an electrician but I'd say yes. But don't message me if something burns down :)

Would this be suitable to stop the electrical connectors on a sliding van door from corroding (where door meets van body when it's closed)?

I don't know. The grease in the auto shop is used at the connection between spark plugs and the coils, to improve electrical connection may well prevent moisture and corrosion, and all that good stuff. As well as lube the connections for future disconnection. Probably what you should be looking for is a properly installed electrical connection and not to rely on some gel. Good luck anyway.

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S/S Permatex® - Dielectric Tune-Up Grease - Wiring & Connection Protection - 85g

Product ID: 57067081

Details

Brand
Permatex
Item weight
85 Grams
Liquid volume
3 Fluid Ounces
Material
Grease
Package information
Tube

⚡Prevents voltage leaks

🔥Withstands up to 400°C

🛡️Protects against salt & corrosion

R922

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Keep your connections charged and corrosion-free — because your ride deserves the best!

VERSATILE PROTECTION - Ideal for marine, automotive, trailer hitches, and battery terminals
PLUG PLAY LONGEVITY - Extends bulb socket life and prevents spark plugs from fusing
SHIELD YOUR SPARK ⚡ - Stops voltage leaks to keep your ignition firing flawlessly
CORROSION ARMOR 🛡️ - Blocks salt, dirt, and corrosion for long-lasting electrical health
HEAT RESISTANT POWER 🔥 - Endures extreme temperatures up to 400°C without breaking down

Permatex Dielectric Tune-Up Grease is a high-performance paste designed to protect electrical connections from salt, dirt, and corrosion while preventing voltage leaks. Rated for extreme heat resistance up to 400°C, it extends the life of bulb sockets and spark plug boots, making it essential for modern high-energy ignition systems in automotive and marine applications.

Specifications

ASIN	B000AL8VD2
Best Sellers Rank	2,323 in Automotive ( See Top 100 in Automotive ) 58 in Greases & Lubricants
Brand Name	Permatex
Container Type	Tube
Customer Reviews	4.8 4.8 out of 5 stars (28,076)
Flash Point	203 Degrees Fahrenheit
Global Trade Identification Number	00686226220585
Included Components	Permatex 22058
Item Form	Paste
Item Type Name	Spark Plugs
Item Weight	85 Grams
Liquid Volume	3 Fluid Ounces
Manufacturer	Permatex
Material	Grease
Model Number	22058
Number of Items	1
Number of Packs	1
Part Number	22058
Recommended Uses For Product	lubricant
Specific Uses For Product	Protect Electrical Connections, Extend Bulb Socket Life, Prevent Voltage Leakage, Prevent Spark Plugs from Fusing to Boots
UPC	686226220585
Unit Count	85.0 gram
Upper Temperature Rating	400 Degrees Celsius
Viscosity	paste

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