Hylomar F/HMMS00C/040G 40g Universal Blue

Hylomar F/HMMS00C/040G 40g Universal Blue

Q: Is this product suitable fur use with cylinder head gaskets/

No. you shouldn't use this on cylinder head gaskets. As another answer says it's fine for sealing joints where there is oil and water. There should be no need for this product on cylinder heads.

Q: Is this suitable to use for sealing oil sumps where a gasket is not used?

Yes, as per other questions. It's fairly rare that a sump won't have a gasket - it may be useful to double check on that, if there are any online resources available on the engine in question. You could also look at making your own - from gasket paper. Still use Hyl/similar, but that might be my preferred option unless specific manual informs otherwise

Q: Would this be suitable for a taper thread union on a petrol line?

My opinion is that it should work but a taper thread may seal better with PTFE tape, (Plumbers tape)

Q: can it be used to seal outlet on woodburner

Hylomar Universal Blue has an operating range of -60 to +600 degrees farenheit. If your woodburner's outlet is less than 600f, then you can probably use it. If it's just below 600f, I'd think twice about using it, as it may start to give off toxic fumes. Why don't you use the proper stuff, ie fire putty/cement?

Product ID: 49103151

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🔥High-temp resistant up to 250°C+

🔧Non-setting for unlimited reusability

🛢️Resists oils, fuels & lubricants

Frequently Bought Together

Hylomar F/HMMS00C/040G 40g Universal Blue

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Description

🔵 Seal like a pro, stay leak-free forever!

COMPACT POWER - 40g tube packed with premium jointing compound for professional use
TRUSTED LEGACY - Rolls Royce approved quality with 30+ years of engineering excellence
LEAK PROOF CONFIDENCE - Ensures a secure, durable seal on metal & plastic joints
VERSATILE PERFORMANCE - Works flawlessly on gaskets, threaded parts & joint faces
ENDLESS ASSEMBLY FREEDOM - Non-setting formula means no hardening, easy disassembly anytime

Hylomar Universal Blue is a premium 40g non-setting jointing compound designed for high-temperature resistance and exceptional durability against oils, fuels, and lubricants. Trusted by automotive professionals and Rolls Royce alike, it provides a reliable, reusable seal for metal and plastic joints, gaskets, and threaded parts, ensuring leak-free performance and effortless maintenance.

Specifications

Manufacturer	Hylomar Ltd.
Brand	Hylomar
Model	F/HMMS00C/040G
Package Dimensions	17.8 x 4.1 x 3.7 cm; 100 g
Item model number	F/HMMS00C/040G
Manufacturer part number	HB40G
Item Weight	100 g

Have a Question? See What Others Asked

Is this product suitable fur use with cylinder head gaskets/

Is this suitable to use for sealing oil sumps where a gasket is not used?

Would this be suitable for a taper thread union on a petrol line?

can it be used to seal outlet on woodburner

Reviews

M**E

Great item

Great item as where I live you can't buy it in any shops, and fast delivery.

9.07.2025

M**D

Great gasket sealer

Worked perfectly on rocker cover gasket. Just the job

1.07.2025

G**T

Does the job

Always work well.

15.06.2025

P**S

18.06.2025

C**.

Sealant

Great product

19.05.2025

M**C

Hylomar

Best gasket sealer out there

17.07.2025

R**T

Still the best

Old school but still the best

29.05.2025

T**T

Good item and reasonably priced

Item good. Postage by seller prompt. Delivery through royal mail terrible.

28.03.2025

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