Says right on the tub: " Not for electrical use". ???

My small jar says "Not for electronics use or with aluminum or magnesium." I have used it to solder electrical wiring and have not had any issues with it. However I am not a professional and only use it for DIY work.

Does this one instantly sizzel and smoke when toched to the tip of a soldering iron

Yes, it both sizzles and smokes as soon as a soldering iron tip touches it. Marked "Not for use on electronic applications."

I plan to use this to fix lg g4. what is the tool required, such as heating equipment?

Rectorseal is an acid base soldering flux used to clean metal surfaces prior to soldering. As for heat, typically soldering is done with one of the following, soldering gun, soldering iron, pencil iron or a torch.Not sure needs repaired on your LG-G4 but I doubt this product is what you want to use.

Can i use this for electronics?

This is not rosin flux. Even though it says non-acidic it's intended for pipes. I wouldn't use it for electronics. Search for rosin flux if you need flux for electronics.

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RectorSeal Nokorode 14000 Paste Flux, Cleans and Fluxes, Plumbing, 1.7 oz.

Product ID: 18219013

💧Lead & acid free, safe for potable water

⚙️1.7 oz precision paste

🛠️Compatible with multiple solderable metals

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Description

🛠️ Flux like a pro—clean, safe, and ready to solder with confidence!

HEALTH SAFETY FIRST - Completely lead and acid free—protect your workspace and water systems
PRO GRADE RELIABILITY - Trusted by HVAC, plumbing, and construction pros for over a decade
ALL IN ONE CONVENIENCE - Includes acid brush under lid for precise, on-demand application
EFFORTLESS APPLICATION - Smooth, soft paste consistency for quick, mess-free soldering
VERSATILE METAL COMPATIBILITY - Works seamlessly on copper, tin, zinc, nickel, and sheet lead

RectorSeal Nokorode 14000 Paste Flux is a 1.7 oz lead- and acid-free soldering paste designed for professional tradesmen. Its smooth consistency ensures easy application on common solders like 95/5, while being safe for potable water systems. Compatible with multiple metals including copper and tin, it includes a built-in acid brush for precision, making it a trusted choice in plumbing, HVAC, and construction markets.

Specifications

ASIN	B000G33PAI
Best Sellers Rank	#14,887 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #19 in Soldering Flux
Color	Original Version
Customer Reviews	4.7 4.7 out of 5 stars (921)
Date First Available	October 29, 2008
Included Components	Rectorseal 14000 1.7-Ounce Nokorode Regular Paste Flux
Item Package Quantity	1
Item Weight	1.6 ounces
Item model number	14000
Manufacturer	The Rectorseal Corporation
Material	brass
Part Number	14000
Product Dimensions	2.2 x 2.2 x 1.8 inches
Size	1.7 Oz

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7505CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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