Can i use liquid wrench penetrating oil on a large pvc water shut off valve? it runs to a waterfall. it has been buried for years and won't budge.

It should not hurt the pvc. If valve has been buried, I would first clear around it then clean it as best as possible. Take a hair dryer or heat gun(be very careful with heat gun) and warm, just warm valve, let cool and warm again. Apply liquid wrench let sit 10-20 mins. Use valve wrench to try and open valve, repeat id necessary. Heat done right(low) ought not cause any problems with liquid wrench which is a flammable.

After it dries, does anyone knows if it will prevent rust?

It does prevent rust. Been using liquid wrench for 40 years to prevent rust on my tools stored in my garage. After iI use a metal tool I spray it with Liquid Wrench. Never lost a tool due to rust.

Is it safe to use for breaking loose rusted stuck exhaust bolts? i know it is flammable but i figure i could clean it off after i get the bolts out.

It won a comparison between 5 other well known rust penetrators by a well know product evaluator on YouTube. But the ultimate exhaust bolt fix is heat if all else fails.

Does this form a foam when sprayed on ??? J. Payne

No, it is more like the consistency of WD-40. It bubble a little when you first spray it (probably from the propellant) but it leaves more of a thin (penetrating) oil residue.

Liquid Wrench L112 12pk Liquid Wrench Penetrating Oil 12 11oz

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

🛠️ Unlock smooth moves and never get stuck again!

SAFE ON ALL SURFACES - Low odor, 0% VOC formula protects painted and metal surfaces without damage.
BULK SUPPLY FOR PRO USE - 12-pack ensures you’re always stocked for any maintenance or emergency fix.
DURABLE CERFLON COATING - Advanced solid lubricant reduces friction and keeps parts moving smoothly longer.
EFFORTLESS RUST RELEASE - Loosens stuck bolts and nuts with minimal effort, saving you time and frustration.
CONSISTENT RELIABLE PERFORMANCE - Trusted formula delivers dependable lubrication for routine and tough jobs alike.

Liquid Wrench L112-12PK is a 12-pack of 11oz penetrating oil sprays designed to effortlessly loosen rusted or stuck bolts, nuts, and locks. Featuring Cerflon solid lubricant for long-lasting friction reduction, this low-odor, 0% VOC formula is safe on painted and metal surfaces, making it ideal for both indoor and outdoor maintenance. Perfect for professionals and DIYers who demand reliable, bulk lubrication solutions.

Specifications

ASIN	B00BGSF8XE
Brand	Liquid Wrench
Brand Name	Liquid Wrench
Container Type	Bottle
Customer Reviews	4.6 out of 5 stars 69 Reviews
Global Trade Identification Number	00078698408804
Item Form	Oil
Item Weight	0.96 Pounds
Item weight	0.96 Pounds
Liquid Volume	11 Fluid Ounces
Liquid volume	11 Fluid Ounces
Manufacturer	Liquid Wrench
Material	Plastic
Model Number	L112-12PK
Number of Items	12
Package information	Bottle
Part Number	L112-12PK
Recommended Uses For Product	Penetrating Oil
Recommended uses for product	Penetrating Oil
Specific Uses For Product	Rusty nuts, bolts and hinges, Clamps and Pipe fittings, Locks and Latches, Frozen mechanisms, Nozzles and hose pipe fittings
UPC	078698408804
Unit Count	132.0 gram

Reviews

S**T

#1 penetrating oil!

This is THE BEST penetrating oil on the market today in my opinion!

14.02.2026

R**T

simple lubricant, in spray, enough to get jobs done

seems to work as well as kroil, or wd40, in spray can, large enough to get several jobs done. even give a can to a helper, with 12 cans.

11.08.2023

P**N

Good stuff!

Liquid wrench is a good alternative to WD40. and tends to be less expensive.

4.12.2023

B**5

My favorite!

Never fails to help crack loose stubborn nuts, bolts, screws, spark plugs, and helps get in to lubricate tight tolerances.

20.07.2025

A**.

This is the best penetrating oil

This is the best penetrating oil I have used. I sprayed it on a sway bar bolt one night then next day went out and the bolt came right off. And I could see that the oil made is way too all the threads.

18.07.2023

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