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 L112/4-4PKLIQUID Wrench L112-4PK Penetrating Oil Spray - 11 oz, (Case of 4)

Liquid Wrench L112/4-4PKLIQUID Wrench L112-4PK Penetrating Oil Spray - 11 oz, (Case of 4)

Product ID: 602976633

Details

Brand
Liquid Wrench
Liquid volume
11 Fluid
Item weight
311 Grams
Global Trade Identification Number
Manufacturer
Liquid Wrench

⚡Powerful rust-dissolving action

🌿0% VOC, low odor & eco-safe

🛠️75+ years trusted formula

Description

🔧 Unlock the power of legacy and innovation in every spray!

ECO FRIENDLY SAFE - Low odor, zero VOC, and gentle on painted surfaces, plastics, and PVC.
MADE IN THE USA WITH LEGACY - Crafted by a family-owned company with 75+ years of innovation and trust.
VERSATILE INDUSTRIAL STRENGTH - Perfect for clamps, pipe fittings, hinges, frozen mechanisms, and more.
COMPLIANT READY FOR ANYWHERE - 50-state compliant formula ensures reliable use nationwide.
UNLOCK STUBBORN RUST INSTANTLY - Penetrates deep to free stuck nuts, bolts, and locks with ease.

Liquid Wrench L112-4PK is a powerful, low-odor penetrating oil spray designed to dissolve rust and free stuck nuts, bolts, and locks. Proudly made in the USA by a family-owned company with over 75 years of trusted performance, it is safe on painted surfaces, plastics, and PVC, and compliant across all 50 states. Ideal for professionals and DIYers seeking reliable, eco-conscious rust removal and lubrication.

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Manufacturer	Liquid Wrench
Brand	Liquid Wrench
Package Dimensions	26.67 x 20.32 x 6.35 cm; 311 g
Item model number	L112/4-4PK
Manufacturer Part Number	L112/4
Item Weight	311 g

Liquid Wrench L112/4-4PKLIQUID Wrench L112-4PK Penetrating Oil Spray - 11 oz, (Case of 4)

Details

Details

Description

Specifications

Common Questions