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MG Chemicals - 404B-340G 404B Contact Cleaner with Electronic Grade Silicones, 340g (12 oz) Aerosol Can
MG Chemicals

MG Chemicals - 404B-340G 404B Contact Cleaner with Electronic Grade Silicones, 340g (12 oz) Aerosol Can

Bottom line: The MG Chemicals: Non-conductive — safe to use on powered electronic contacts; main trade-off: silicone film can hinder soldering or paint adhesion on treated surfaces.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For PC and retro-hardware cleaning and maintenance tools, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Non-conductive — safe to use on powered electronic contacts
  • ✓ Leaves dry electronic-grade silicone film for lubrication and oxidation protection
  • ✓ Fast evaporation rate, dries quickly with no wet residue
  • ✓ Dry lubrication outperforms mineral-oil cleaners in dusty environments

Cons

  • ✗ Silicone film can hinder soldering or paint adhesion on treated surfaces
  • ✗ Safe on most, not all, plastics — spot-test sensitive parts first
  • ✗ Small 340g (12 oz) aerosol, not economical for high-volume jobs
  • ✗ Solvent system requires good ventilation during use

Manufacturer description

The 404B Electronics Contact Cleaner with Silicone is a very fast drying contact cleaner. It is a plastic-safe solvent cleaner that leaves a thin film of dry electronic grade silicone behind. The solvent system effectively dissolves oil and organic residues. The silicone provides lubrication, preventing wear and tear, as well as a layer of protection from oxidation and the elements. As well, the dry lubrication makes it better for dusty environments than mineral oil alternatives.

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SpecPicks Verdict

SpecPicks scored MG Chemicals using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. MG Chemicals's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Non-conductive
  • Maximum service temperature of 200 ºC (392 ºF)
  • Safe on most plastics
  • Fast evaporation rate
  • Suitable for Use in Food Facilities as a Non-Food Chemical—Canadian and NFS recognition letters available on request

Full Specifications

Size12 Ounce (Pack of 1)
BrandMG Chemicals
ScentMild
Weight340g
Item FormAerosol
Unit Count12.0 Ounce
Item Volume200 Milliliters
Part Number404B-340G
Model Number404B-340G
Number of Items1
Material FeatureOrganic
Special FeaturesResidue Free
Material FeaturesOrganic
Included ComponentsExtension Straw
Warranty Descriptionwarranty@mgchemicals.com
Surface RecommendationPlastic
Contains Liquid Contents?Yes
Specific Uses For ProductElectrical contact cleaner
Global Trade Identification Number00779008404348

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MG Chemicals - 404B-340G 404B Contact Cleaner with Electronic Grade Silicones, 340g (12 oz) Aerosol Can is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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MG Chemicals - 404B-340G 404B Contact Cleaner with Electronic Grade Silicones, 340g (12 oz) Aerosol Can
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