I have been using the 422B version of this product for years and have been completely happy with the results. How does the new 422C version compare?

Works the same and was cheaper, package included 2 brushes for applying it.

Will this make a flexible coating for headphone wires?

No, this product is for water proofing components on a board that is not exposed to regular handling or significant flexing. You need to look at heat shrink tubing or brush on insulation. Heat shrink tubing is probably the best choice depending on what you're trying to do.

Can you use this on an led light over an aquarium? is it toxic after it cures? how long does it last? do you have to keep reapplying it?

I wouldn't put it in an aquarium's water just to be safe, but if trying to stop short circuits in a wet environment- that is what it does if applied correctly and completely covering circuitry, connections etc. Water doesn't seem to degrade an application by itself, physical wear from handling can happen, but it is very durable otherwise and not needing re-coating. Use UV light to see if coverage is complete as it Floreses blue/green so can inspect.

can i paint this on a motherboard to resurface if i scratched the green coating that covers a board?

It will cover it to prevent any shorts, yes. It is conformal coating. I prefer the UV curable type, but it will work.

Mg Chemicals 422c 55mlca 422c Silicone Conformal Coating 55 Ml

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Description

🛡️ Protect your tech like a pro—because failure is not an option!

INVISIBLE GUARDIAN - Crystal-clear silicone finish keeps your components pristine without hiding their sleek design.
SMART COMPATIBILITY - Validated for selective robotic coating—ideal for cutting-edge manufacturing and precision projects.
HEAT PROOF RELIABILITY - Withstands scorching conditions up to 200°C, perfect for high-performance and industrial-grade electronics.
ULTIMATE ELECTRONIC SHIELD - Defends your circuits from moisture, dust, fungus, and static discharge—because your tech deserves fortress-level protection.
FAST FLAWLESS APPLICATION - Dries clear and ready in just 10 minutes, saving you time without compromising quality.

MG Chemicals 422C Silicone Conformal Coating is a high-performance protective liquid designed to shield electronics from moisture, corrosion, fungus, dust, thermal shock, and electrical hazards. It operates reliably up to 200°C, fluoresces under UV-A light for easy inspection, dries clear in 10 minutes, and is compatible with robotic application systems, making it a top choice for industrial and high-tech environments.

Specifications

ASIN	B085G42TGS
Best Sellers Rank	#17,331 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #255 in Lab Supplies
Brand	MG Chemicals
Brand Name	MG Chemicals
Colour	transparent
Compatible Material	Ceramic, Metal, Plastic
Container Type	Bottle
Country of Publication	USA
Customer Reviews	4.7 out of 5 stars 1,011 Reviews
Full Cure Time	2E+1 Minutes
Included Components	2 Brushes
Item Form	Liquid
Item Package Quantity	1
Item Type Name	Protective Coating
Item Weight	50.7 Grams
Manufacturer	MG Chemicals
Manufacturer Part Number	422C-55MLCA
Material	Silicone
Material Type	Silicone
Model	422C-55MLCA
Number of Pieces	1
Other Special Features of the Product	Cold Resistant, Crack Resistant, Dries Clear, Fast Drying, Heat Resistant, Strong
Special Feature	Cold Resistant, Crack Resistant, Dries Clear, Fast Drying, Heat Resistant, Strong
Specific Uses For Product	Industrial applications, high temperature environments, high humidity environments, corrosive environments Specific Uses For Product Industrial applications, high temperature environments, high humidity environments, corrosive environments See more
UPC	779008422069
Unit Count	1.86 Milliliters
Viscosity Level	Medium
Volume	55 Millilitres
Water Resistance Level	Water Resistant

Reviews

M**U

Good product

It applies well and dries fast. Works better when appliying a generous coat; the end result just looks better.

10.09.2022

J**G

Easy to use

Easy to use and the additive that glows in UV light helps to ensure complete coverage. Very useful.

25.04.2026

D**D

Perfect for waterproofing rc motherboards

Simple to use and super effective!

20.03.2024

O**Y

The good stuff!

Wow! This was exactly what I needed to finish up a project that I was working on. This stuff is next to impossible to find locally anymore, and this particular brand works very well. You get what you pay for when it comes to this stuff so buy the best! Thank you Amazon for making this available!

3.05.2026

S**N

Used as painting coatings…works great

18.05.2026

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64346CFA

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

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