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🛠️ Seal like a pro, perform like a legend.
Hylomar 71522 is a high-performance polyester polyol-based sealant originally engineered for aerospace use by Rolls Royce. It resists oil, gasoline, glycol, and engine fluids while sealing ultra-thin gaps up to 0.01 inches. With a non-hardening formula that withstands temperatures up to 600°F, it ensures durable, vibration-resistant seals for automotive and industrial applications. Trusted by Mercedes-Benz OE and top mechanics, it delivers precision sealing without the need for traditional gaskets.
| ASIN | B071GC28QT |
| Batteries Required? | No |
| Best Sellers Rank | #284,917 in Automotive ( See Top 100 in Automotive ) #141 in Gasket Sealers |
| Brand | Valco Cincinnati |
| Color | Yellow |
| Customer Reviews | 4.6 4.6 out of 5 stars (36) |
| Date First Available | June 9, 2017 |
| Included Components | Valco |
| Item Package Quantity | 1 |
| Item Weight | 3.76 ounces |
| Item dimensions L x W x H | 1.7 x 6.85 x 1.45 inches |
| Item model number | 71522 |
| Manufacturer | Valco Cincinnati |
| Material | polyester |
| Number of Pieces | 1 |
| Part Number | 71522 |
| Product Dimensions | 1.7 x 6.85 x 1.45 inches |
| Set Name | Single Item |
| Size | , 1 Pack |
| Thread Size | 0.01 inch |
M**E
Best seal of all gaskets tested
I pressure test all my repairs especially cooling system before it leaves my shop, hylomar M seals better than any gasket. It cures to credit card thickness, perfect for most work. I like it more than hylomar AF with a gasket, has eliminated come backs. Be sure to follow label directions no wonder all the high dollar mfgs. Use this
A**R
Mercedes Oe product
This is what mercedes benz actually uses and it’s oe equipment.
A**N
Works very well
Hylomar is a gift from the gods. Doesn't leak and can be removed with a brush and brake cleaner.
B**E
Fuel proof seal
Extremely fuel resistant, goes on like a gel and firms up. Glue like, but parts can be separated, then reattached without needed more product. I used it to seal fuel sender gaskets and hardware to aluminum tanks on my Aircraft.
V**S
nonhardening sealant is very easy to work with and clean up when gaskets need ...
I have used hylomar for years, formerly under the Permatex brand, and it works very well. nonhardening sealant is very easy to work with and clean up when gaskets need to be replaced.
A**L
Mandatory in your shop.
How to explain this product... You can have a garage and a shop without having this product. This and WD-40 is a pair.
A**S
Used this on my copper head gasket along with copper ...
Used this on my copper head gasket along with copper cost and it sealed up coolant and oil ports perfectly
T**E
Greatr
Exactly what I was expecting.
Trustpilot
5 days ago
1 week ago