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 L106 Penetrating Oil, 5.5 Oz

Liquid Wrench L106 Penetrating Oil, 5.5 Oz

Product ID: 7076477

Details

Brand
Liquid Wrench
Item Weight
1.44 ounces
Liquid Volume
5.5 Fluid
Material
Blend
Package Information
Bottle

🌿Low odor & 0% VOC

🔥Powerful rust dissolver

⚙️5.5 oz precision spray

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R525

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Unlock stuck potential with every spray!

TRUSTED LEGACY - Backed by 75+ years of family-owned innovation and trusted by pros and DIYers alike.
MADE IN THE USA - Proudly crafted in Charlotte, NC, ensuring quality and supporting local craftsmanship.
ECO SMART SAFE - Low odor, zero VOC, and safe on painted surfaces, plastics, and PVC—work confidently indoors or out.
RUST CONSIDER IT GONE - Powerful penetrating formula that dissolves rust and frees stuck nuts, bolts, and locks fast.
UNSTICK WITH PRECISION - 5.5 oz bottle with included straw for targeted application—no mess, no waste.

Liquid Wrench L106 Penetrating Oil is a 5.5 oz precision spray designed to quickly dissolve rust and free stuck hardware. With a powerful, low-odor, zero VOC formula safe on multiple surfaces, it’s trusted by professionals and DIY enthusiasts alike. Proudly made in the USA by a family-owned company with over 75 years of expertise, this penetrating oil delivers reliable, mess-free performance every time.

Specifications

ASIN	B00200MR8Q
Best Sellers Rank	#4,604 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Assembly Lubricants
Brand Name	Liquid Wrench
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (279)
Global Trade Identification Number	00076335005232, 00078698120133
Included Components	LIQUID WRENCH PENETRATING OIL 5.5 OZ.
Item Form	Oil
Item Type Name	LIQUID WRENCH PENETRATING OIL 5.5 OZ.
Item Weight	1.44 ounces
Liquid Volume	5.5 Fluid Ounces
Manufacturer	BBI- Blumenthal Brands Integrated (Gunk and Liquid Wrench)
Material	Blend
Model Number	L106
Number of Items	1
Part Number	L106
Recommended Uses For Product	Lubricant
UPC	076335005232 078698120133
Unit Count	5.5 Ounce
Warranty Description	No_warranty

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