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Penetrant 4 Fluid ounce(s) Penetrant

Ratings & Reviews for Blaster Penetrant 4 Fluid ounce(s) Penetrant

4.3
226
Review
 4.3 out of 5
226 Reviews


74% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this penetrating oil for its exceptional ability to dissolve rust and free seized bolts, nuts, and frozen hardware—often describing it as the only product that works when others fail. It penetrates deeper than competitors, visibly wicking into threads. However, many report consistent frustration with cans losing pressure while still one-third to half full, rendering remaining product unusable. The ProStraw nozzle also draws criticism for clogging and poor durability. A few mention strong odor and warranty difficulties. Despite hardware defects, most consider the product's rust-busting performance indispensable.

Customer review summary generated by AI, including incentivized reviews.
226 Customer Reviews

Very fast acting lubricant!

[This review was collected as part of a promotion.] This product helped me so much on some stuck nuts I had on my lawnmower. It quickly broke down the rust and I had the nut off quickly! I would highly recommend this product as it worked so easily

April 9, 2026

From influenster.com

PB is the most reliable penetrant out there, now m

[This review was collected as part of a promotion.] PB blaster has been a staple on my toolbox for years because nothing else really loosens rusted on bolts the way this stuff does. You can actually see it wicking into the threads. The latest design includes an adjustment which limits how much product comes out of the straw. Making it customizable to the job. Being able to dial back the flow means I'm not wasting product or making a huge mess. Which makes clean up a whole lot easier. It still ha...

April 9, 2026

From influenster.com

Lifesaver if you are in a bind

[This review was collected as part of a promotion.] This is a top tier product. This penetrating oil can be used to break just about anything open. It is expensive but when you need it, this can is priceless. It will get you out of a lot of tough situations. The straw is also high quality and makes it very easy to spray and not like a random can you find at the auto parts store.

April 9, 2026

From influenster.com

Effective rust remover

[This review was collected as part of a promotion.] Engine work, mudflap or heavy duty shock absorber change PB will do the job. That's the number 1 choice for me ever. PB B'laster Penetrant is safe to use. The drying time is quite quick. I like that the consistency is thin, and it penetrates easily into hard spaces removing the rust.

April 9, 2026

From influenster.com

Blaster since 1957

[This review was collected as part of a promotion.] The blaster penetrant work it like a pro since 1957. It break and lose rusting screws and bolts in the car. This product protect the screw and bolt from getting rusty again.

April 8, 2026

From influenster.com

Must Have In The Garage

[This review was collected as part of a promotion.] This is the best penetrating spray out. It works super well comes out in a nice stream and works in no time. Any time i have something i need to get to break free. I reach for this.

April 8, 2026

From influenster.com

Give me a break, PB B’lasted penetrate :)

[This review was collected as part of a promotion.] The PB B’laster Penetrant certainly penetrated stubborn rusted screws for safe removal. The can is designed in a bright red and easy to spot in dim environments and is super easy to use. The flip up precision applicator is perfect for tight to reach spots and if I need more, I can just flip it down and go to town :). Doesn’t leave a messy residue and is easily cleaned with soap and water.

April 8, 2026

From influenster.com

Easy to use for any condition

[This review was collected as part of a promotion.] One of my favorite products I use in the mechanic industry. Affordable product that helps breaks down rust and lubricate whatever you may need. Can use it anywhere and for a lot of things. The sprayer covers large areas and can reach far. Simple packaging that makes it easy to carry wherever you may need.

April 8, 2026

From influenster.com

Rust genie in a bottle

[This review was collected as part of a promotion.] I have been able to use this penetrant for a few stubborn bolts and it really gets the job done. The spray is easy to control and the built in straw makes it simple to dial it in and hit tight spots without making a mess. It feels solid in hand and doesn’t leak or drip like other cheaper sprays. After letting it sit for a bit, I could actually feel parts loosen up way easier than before. Compared to something like the Wd 40, this feels much str...

April 8, 2026

From influenster.com

The best penetrating oil for breaking loose stubbo

[This review was collected as part of a promotion.] Living in NY, rust is a nightmare for my Camry. I used PB B’laster on my rusted hood latch and the performance was instant. You could see it “wick” into the metal to break up oxidation. It’s incredibly easy to use and essential for older cars!

April 7, 2026

From influenster.com

Save your wrenches and your knuckles. Use PB B'las

[This review was collected as part of a promotion.] PB Blaster is a staple in the shop! There's nothing worse than spending hours trying to remove a seized bolt just to end up stripping the bolt or your socket! Spray on a decent amount of PB Bpaster and go relax for 30-45 minutes. When you return, that stubborn bolt doesn't stand a chance, and you can save your tools from unnecessary damage (and your knuckles!). I used to work on a lot of older classic cars that tended to be rusty underneath, an...

April 7, 2026

From influenster.com

Great

[This review was collected as part of a promotion.] Great spray. Adjustable nozzle spraying for comfort. Works great on loosening bolts. Sprays extremely easy you don't even need to press hard .

April 6, 2026

From influenster.com

Perfect

[This review was collected as part of a promotion.] I recently tried the Blaster PB Penetrating Catalyst, and honestly, it did exactly what I needed it to do. I had a couple of stubborn, rusted screws that wouldn't budge no matter how much force I used. After spraying this and letting it sit for a few minutes, I was finally able to loosen them without stripping anything.

April 6, 2026

From influenster.com

Try it it works

Would Recommend

Does the job at right price

April 4, 2026
Verified Purchaser
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Long lasting lubricant. Great value for the price

Would Recommend

Blaster MP is awesome to get bolts unstuck and more.

March 24, 2026
Verified Purchaser
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Good bottle o’ lube

[This review was collected as part of a promotion.] Good performance. Has a wild smell. Very effective. The sprayer is good for coverage and easy application. Overall great lube. Definitely recommend

March 16, 2026

From influenster.com

Penetrating Oil

Would Recommend

Works as expected!

February 4, 2026
Verified Purchaser
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