will this compound work on steel machine screws?

It used to aid with conductivity for aluminum tubing and brackets used in ham radio antennas, since it contains zinc. Not sure if it works with steel, maybe use anti-seize, which contains copper, for steel ?

How is this product better or different from dielectric grease? Is it suitable for use on automobile connectors in the engine bay?

Dieledtric grease is non electrical transmitting. It helps dissipate heat evenly on a flat surface usually. The Penetrox A is made for electrical connections and for anti oxidation on aluminum parts. I use the Penetrox A for ham radio antenna assembly use. I started using Jet Lube SS-30 pure copper anti seize lubricant for electrical transmission in my antennas. As you know copper is an excellent conductor so it works very well on electrical connections, and antennas have many connections on them. The Penetrox will conduct also but the copper much more so. They both are kind of messy if you have ever used anti seize before, you know what I mean. That is about all I know, I hope I helped you in the answer I gave.

Someone knows where can I found Penetrox E ?

I think you can get it here on Amazon

What is the hmis of product?

The product does not come with the HMIS, however goggle is your friend to find out.

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Burndy P8A Oxide-Inhibiting Joint Compounds PENETROX A, 8 oz Container Size, Squeeze Bottle Container Type

Product ID: 12830187

Details

Brand
Burndy
Item Form
Liquid
Material
Aluminum
Special Feature
Specific Uses For Product
Fleet and

⚡UL listed to 600 V

🔧8 oz squeeze bottle for precision application

🛡️Oxide-inhibiting corrosion protection

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Description

⚡ Seal the deal with connections that never quit!

DURABLE WORKABLE - Remains effective and workable when stored under 100°F in dry conditions
USER FRIENDLY PACKAGING - 8 oz squeeze bottle ensures mess-free, precise application every time
CERTIFIED SAFETY COMPLIANCE - UL listed, CSA certified, and RoHS compliant for peace of mind
VERSATILE METAL COMPATIBILITY - Perfect for aluminum-to-aluminum, aluminum-to-copper, and conduit joints
POWERFUL ELECTRICAL PROTECTION - Prevents galvanic corrosion for lasting, reliable connections

Burndy P8A PENETROX A is an 8 oz squeeze bottle of premium electrical joint compound designed to inhibit oxide formation and prevent galvanic corrosion. Ideal for aluminum and copper connections, it is UL listed to 600 V, CSA certified, and RoHS compliant, ensuring safe, durable, and high-performance electrical joints for professional-grade maintenance.

Specifications

ASIN	B008KLX2RY
Brand Name	Burndy
Color	Cream
Compatible Material	Aluminum, Metal
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (176)
Included Components	Item
Item Form	Liquid
Item Package Quantity	1
Item Weight	0.87 Pounds
Manufacturer	Burndy
Material Type	Aluminum
Model	P8A
Other Special Features of the Product	Oxide-Inhibiting
Part Number	P8A
Specific Uses For Product	Fleet and plant maintenance.
UPC	729198267278 781810592557
Unit Count	8.0 Fluid Ounces
Viscosity Level	Medium to High
Volume	8 Fluid Ounces
Water Resistance Level	Not Water Resistant

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