


🛡️ Seal the deal with Hylomar – where flexibility meets industrial strength!
Hylomar F/SL303HY/040M is a 40ml clear instant gasket compound engineered for professional-grade sealing. Its polyester urethane base ensures a permanently flexible, non-setting seal that withstands temperatures up to 250°C and resists a broad spectrum of automotive and industrial fluids. Ideal for automotive, aerospace, defense, and general engineering, it fills gaps up to 4mm and adheres to multiple surfaces, delivering reliable, high-performance sealing where it counts.
| Manufacturer | hylomar |
| Brand | Hylomar |
| Package Dimensions | 13 x 3.8 x 2.8 cm; 40 g |
| Item model number | F/SL303HY/040M |
| Manufacturer part number | F/SL303HY/040M |
| Item Weight | 40 g |
D**Y
Great product used it for years in my profession as a motor mechanic
Great product,clear so once job complete ,wipe down and everything looks like new.
J**
Seals great
Works on me Moggi minor from 1965 so can’t see why it won’t work on modern clunker
J**K
instant gasket
good product
B**L
It's a Hylomar product and does exactly as it should!
Used to reseal the fuel filler on my narrowboat after fitting of a locking device. Due to the nature of the casting this could have been a problem, but the product adhered to the narrow rings of the casting and gave a clean and tidy finish.
M**T
Exactly as described and worked well
Good price for product and exactly as described - typically excellent Hylomar - would recommend
K**R
Not fuel resistant
As per first review,this product is wrongly described,and is not fuel resistant,so could not be used for my intended purpose.
G**R
Hylomar
I've used Hylomar products for over 50 years first class
C**R
Incorrect description
Says that this is resistant to fuel on amazon but the product received says it is not and as we need it for the carburettor it's not acceptable
Trustpilot
1 month ago
3 weeks ago