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.

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Liquid Wrench L112-12PK Penetrating Oil (12/11Oz)

Liquid Wrench L112-12PK Penetrating Oil (12/11Oz)

Product ID: 398888746

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Details

Material
Plastic
Brand
Liquid Wrench
Package Information
Bottle
Liquid Volume
11 Fluid
Item Weight
436 g

⚡Powerful rust-dissolving formula

🔧12-pack for bulk reliability

🇺🇸100% Made in USA quality

Description

⚙️ Unlock the power of precision with every spray!

ECO SMART SAFE - Low odor, 0% VOC, and safe on painted surfaces, plastic & PVC
RUST NO PROBLEM - Powerful formula dissolves rust and cuts through grease effortlessly
BULK UP YOUR TOOLBOX - 12-pack ensures you’re always ready for any stuck mechanism
TRADE TRUSTED LEGACY - 75+ years of innovation trusted by pros and DIYers alike
UNSTICK WITH CONFIDENCE - Penetrates deep to free stuck nuts, bolts, and locks fast

Liquid Wrench L112-12PK is a 12-pack of 11oz penetrating oil bottles designed to quickly free stuck nuts, bolts, and locks. Its powerful, low-odor, 0% VOC formula dissolves rust and cuts grease while being safe on painted surfaces and plastics. Proudly made in the USA, this trusted product has served tradesmen and DIYers for over 75 years, delivering consistent, professional-grade performance.

Specifications

Material	Plastic
Brand	Liquid Wrench
Package Information	Bottle
Liquid Volume	11 Fluid Ounces
Item Weight	436 g
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
Item Form	Liquid,Oil
Global Trade Identification Number	00078698408804
Manufacturer	Liquid Wrench
Net Quantity	132.0 Grams
UPC	078698408804
Number of Items	12
Country of Origin	USA
Model number	L112-12PK
Colour	Yellow
Product Dimensions	27.69 x 21.34 x 22.35 cm; 436.2 g
Item model number	L112-12PK
Item Height	8.8 Inches
Item Width	8.4 Inches
Are batteries included?	No

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