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SUPCO MO44 penetrant in 4 oz squeeze bottle

SUPCO

SUPCO MO44 Penetrant 4 oz Squeeze Bottle

SKU CH-SEP9-F23N5

A non-flammable penetrating lubricant in a 4 oz squeeze bottle that frees rusted parts and meets 50-state VOC rules

  • Synthetic base penetrates rusted fasteners without flammability risk
  • Operates reliably from -4 °F to 68 °F in cold environments
  • 50-state VOC compliant with zero percent VOC content
  • USDA certified biobased formula reduces environmental impact
  • High 302 °F flash point adds safety during use

SUPCO MO44 Penetrant Overview

SUPCO MO44 Penetrant is a synthetic-base penetrating lubricant designed to free rusted or seized fasteners in automotive and industrial maintenance. The 4 oz squeeze bottle allows precise application directly onto threads, bolts and fittings. It is intended for mechanics and technicians who need a nonflammable formula for shop safety.

Thermal Range and Safety

The lubricant operates from a minimum of -4 degrees F up to a maximum of 68 degrees F, remaining effective across cold and moderate workshop conditions. Flash point is rated at 302 degrees F, confirming the nonflammable claim for safer storage and use. Zero percent VOC content makes it 50-state VOC compliant without noticeable odor.

Upgrade From Standard Penetrants

This product replaces conventional petroleum-based penetrants that carry flammability risk and higher VOC emissions. The synthetic mineral-oil base suits environments where fire codes restrict traditional solvents. It is not suited for applications requiring NSF food-grade certification or USDA biobased approval.

How it compares

Measured against everything we stock in Pliers, Wrenches & Gripping Tools, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 92% of the 2,110 comparable items (median $23.99).

Specifications

Product
Brand nameSUPCO

Questions about this item

How do I apply the SUPCO MO44 penetrant from the 4 oz squeeze bottle without wasting product?

Point the nozzle directly at the seized threads or fitting and squeeze gently to dispense a thin stream; the step people miss is letting it soak for several minutes before attempting to turn the fastener.

Will the squeeze bottle or the penetrant itself need replacement after a period of storage?

The 4 oz squeeze bottle is a single-use container; once the 4 oz net fill is depleted you simply purchase a new bottle, as the mineral-oil formula does not require additive replenishment.

At what temperature does the penetrant stop being effective during prolonged use in a hot engine bay?

The maximum operating temperature is 68 Degrees F; above this the viscosity drops and the fluid can run off before it fully penetrates the rust.

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