gasket marker or gasket maker?

Neither marker or maker. It is a joint sealant that can be used with or without a gasket

Can I use this to permanently seal the 24" X 24"inspection lid on my boats onboard 60 gallon gas tank ?

If you are using a gasket, I would guess Hylomar would be a good product. I did use this product on a rubberized cork gasket for a fuel sending unit. Hylormar did the trick nicely. If you are not using a gasket, I don't think Hylomar would be the right product. Hylomar doesn't dry out or cure as a permanent gasket maker like RTV sealant.

Has anyone used this on a BMW valve cover gasket with good success?

Hello! I have used this Hylomar gasket to seal MG head gaskets, Cadillac 4100cc intake manifold gaskets, and other really difficult applications. I can't see that a BMW valve cover gasket will pose any problems. Just apply a thin film on both sides of the gasket and close within 10 minutes. The Hylomar never dries out so it doesn't shrink. The secret to valve cover gaskets cork or rubber is to not over tighten the retaining bolts. There is probably an Inch Pound torque spec for your car which you should follow. Hope this helps.

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71283 Hylomar Blue Gasket Marker and Thread Sealant Tube with Nozzle - 100 Grams

Product ID: 20826441

Details

Brand
Valco
Item Weight
3.84 ounces
Item dimensions L x W x H
7.48 x 1.18 x
Material
metal
Style
Industrial

💧Water and moisture resistant

🔥Resists rapid temperature changes

🛠️3.5 oz precision tube

24413CFA

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Description

🔧 Seal like a pro, perform like a boss.

TEMPERATURE WARRIOR - Withstands rapid temperature swings without cracking or drying out—built for high-performance environments.
UNLIMITED ASSEMBLY TIME - Work at your own pace with a non-hardening, semi-rigid sealant that never rushes you.
MULTI FLUID COMPATIBILITY - Resistant to combustion products, oils, coolants, and kerosene—versatile for all your automotive needs.
VIBRATION RESISTANT FORMULA - Keeps your seals intact even under intense engine vibrations—no leaks, no worries.
UNIVERSAL METAL TO METAL SEAL - Ensures flawless surface contact and seals imperfections for ultimate engine protection.

The 71283 Hylomar Blue Gasket Marker and Thread Sealant is a 3.5 oz industrial-grade, non-hardening sealant designed for metal-to-metal contact. It offers superior resistance to temperature fluctuations, vibration, moisture, and a wide range of automotive fluids, making it ideal for sealing engines, pumps, gearboxes, and more. Trusted worldwide and highly rated, it provides unlimited assembly time and reliable, long-lasting seals for professional-grade performance.

Specifications

ASIN	B00CFH9GZG
Best Sellers Rank	#58,518 in Automotive ( See Top 100 in Automotive ) #49 in Gasket Sealers #278 in Engine Tools
Brand Name	Valco Cincinnati
Compatible Material	Metal
Customer Reviews	4.8 4.8 out of 5 stars (558)
Item Dimensions	7.48 x 1.18 x 1.97 inches
Item Form	Liquid
Item Weight	3.84 ounces
Manufacturer	Valco Cincinnati
Material Type	metal
Model	710XX283
Number of Items	1
Part Number	71283
Style Name	Industrial
UPC	042864033596 191215144747
Unit Count	1 Count
Warranty Description	No
Water Resistance Level	Water Resistant

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24413CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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