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.

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MG Chemicals - 422C-55MLCA 422C Silicone Conformal Coating 55 mL Bottle

MG Chemicals - 422C-55MLCA 422C Silicone Conformal Coating 55 mL Bottle

Product ID: 442045494

Details

Brand
MG Chemicals
Item Form
Liquid
Material
Silicone
Special Feature
Cold Resistant

💧Water & corrosion resistant

🔥Max service temp 200°C

🔦UV-A fluorescence for easy inspection

53233CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Shield your tech with confidence—because your gear deserves the best!

VERSATILE COMPATIBILITY - Works seamlessly on ceramic, metal, and plastic surfaces—your all-in-one protective solution.
UV FLUORESCENT INSPECTION - Fluoresces under UV-A light for quick, foolproof quality control and maintenance checks.
FAST PRECISE APPLICATION - Dries clear in just 20 minutes and validated for selective robotic coating—efficiency meets precision.
HEAT RESISTANT PERFORMANCE - Withstands extreme temperatures up to 200°C, perfect for high-temp industrial environments.
ULTIMATE ELECTRONIC SHIELD - Protects against moisture, dust, fungus, and static discharge for long-lasting device reliability.

MG Chemicals 422C Silicone Conformal Coating is a fast-drying, heat-resistant protective liquid designed to safeguard electronics from moisture, corrosion, dust, and electrical faults. With a max service temperature of 200°C and UV fluorescence for easy inspection, it’s ideal for industrial and high-humidity environments, compatible with multiple materials, and optimized for robotic application.

Specifications

ASIN	B085G42TGS
Best Sellers Rank	#46,608 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #714 in Lab Supplies
Brand Name	MG Chemicals
Colour	transparent
Compatible Material	Ceramic, Metal, Plastic
Container Type	Bottle
Country of Publication	USA
Customer Reviews	4.7 4.7 out of 5 stars (1,028)
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 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
Specific Uses For Product	Industrial applications, high temperature environments, high humidity environments, corrosive environments
UPC	779008422069
Unit Count	1.86 Milliliters
Viscosity Level	Medium
Volume	55 Millilitres
Water Resistance Level	Water Resistant

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