Would this do good to seal a usb port with a usb cord plugged in?

Not sure why you need to seal a USB PORT but I see no reason it wouldnt keep it waterproofed.

Is this stuff good for polyureathane bushings

Yes it is good for polyurethane bushings.....the lube they sell for the bushings is essentially rebranded dielectric grease too.

Has anyone tried this on fishing reel components? Is it light enough?

Definitely! I've been using it from 15 yrs or more... The main purpose, to seal the reel and protect screws from salt; for those that are not stainless I fill the hole with the grease to the top well, every where there is a screw head facing out. And all around the edge and bound surface of the gear cover, anywhere water can sip in! And in the gears, but I would mix it with other type to soften a bit for smooth reeling experience.

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Mission Automotive Silicone Dielectric Grease Paste - 8 Oz Dielectric Grease for Electrical Connectors and Spark Plug Protection - Waterproof Clear Silicone Paste Automotive Greases and Lubricants

Mission Automotive Silicone Dielectric Grease Paste - 8 Oz Dielectric Grease for Electrical Connectors and Spark Plug Protection - Waterproof Clear Silicone Paste Automotive Greases and Lubricants

Product ID: 19409154

Details

Brand
Mission
Item Weight
8 ounces
Liquid Volume
226.8 ml
Material
Silicone
Package Information
Jar

💧Waterproof sealing - ultimate protection

🔥570°F flash point - heat resistant

🖌️Built-in applicator brush - precision

₪127

Duties & taxes included

In stock

Sold byAmazon IsraelDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal the deal with Mission Grease – where precision meets protection!

UNMATCHED HEAT RESISTANCE - Withstands extreme temperatures up to 570°F for reliable performance under pressure.
PRECISION APPLICATION BRUSH - Integrated brush ensures mess-free, exact coverage every time—no grease wasted.
TRUSTED BY PROS ENTHUSIASTS - Top-rated with 4.8 stars from over 5,000 users, making it a must-have for serious vehicle care.
WATERPROOF SEAL FOR LONGEVITY - Prevents oxidation and corrosion, keeping your electrical connections flawless in any environment.
VERSATILE MULTI SURFACE COMPATIBILITY - Perfect for rubber, plastic, and metal—ideal for spark plugs, brake calipers, and more.

Mission Automotive Silicone Dielectric Grease Paste is a premium 8 oz waterproof silicone lubricant designed to protect electrical connectors and spark plugs from corrosion and voltage leaks. Featuring a high flash point of 570°F and an integrated applicator brush, it ensures durable, precise application across rubber, plastic, and metal surfaces. Highly rated and versatile, it’s engineered for automotive, marine, and electrical maintenance to extend the life and reliability of your vehicle’s components.

Specifications

ASIN	B016E5E59G
Best Sellers Rank	#26,689 in Automotive ( See Top 100 in Automotive ) #13 in Automotive Electrical Greases
Brand Name	Mission Automotive
Compatible Material	Rubber, Plastic, Metal
Container Type	Jar
Customer Reviews	4.8 4.8 out of 5 stars (5,050)
Flash Point	570 °F
Included Components	1
Item Form	Paste
Item Weight	8 ounces
Liquid Volume	226.8 ml
Manufacturer	Mission Automotive
Material	Silicone
Model Number	8542064566
Number of Items	1
Number of Packs	1
Part Number	08946
Recommended Uses For Product	Car,Electrical,Windows
Specific Uses For Product	Automotive, Mechanical
UPC	638037142402
Unit Count	8 Ounce
Upper Temperature Rating	570 °F

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