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?

4.7/5

Product ID: 49103151

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💧Non-setting, flexible seal

🔥High-temp resistance up to 250°C+

🛢️Oil & fuel resistant formula

Frequently Bought Together

Hylomar F/HMMS00C/040G 40g Universal Blue

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Description

🛠️ Seal like a pro, perform like a legend!

COMPACT 40 G TUBE - Portable and easy to apply, ideal for on-the-go professionals and precision repairs.
TRUSTED INDUSTRY STANDARD - From Hylomar Ltd., a brand synonymous with quality and durability in jointing compounds.
UNMATCHED THERMAL ENDURANCE - Withstands extreme heat without breaking down, perfect for demanding industrial applications.
ULTIMATE CHEMICAL RESISTANCE - Repels oils, lubricants, and fuels to maintain a flawless seal under harsh conditions.
FLEXIBLE NON SETTING COMPOUND - Remains pliable and reliable over time, ensuring leak-proof joints without hardening.

Hylomar Universal Blue is a 40g non-setting jointing compound designed for superior resistance to oils, fuels, and high temperatures. Its flexible formula ensures durable, leak-proof seals in industrial and automotive applications, making it a must-have for professionals demanding reliability and performance.

Specifications

Manufacturer	Hylomar Ltd.
Brand	Hylomar
Model	F/HMMS00C/040G
Package Dimensions	12.8 x 3.3 x 2.7 cm; 60 g
Item model number	F/HMMS00C/040G
Manufacturer part number	HB40G
Item Weight	60 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

4.7

All from verified purchases

R**T

Still the best

Old school but still the best

29.05.2025

C**.

Sealant

Great product

19.05.2025

T**T

Good item and reasonably priced

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

28.03.2025

S**S

Ok with modern petrol

Was ok from what I saw seams to work with modern petrol

30.03.2025

Y**K

Fine

1.04.2025

D**L

Good stuff🙂

Very good item & widely ly used👍

23.01.2025

C**S

Good stuff

very happy

27.11.2024

K**R

Good as always

Used to seal crankcase on a chain saw, worked well

12.11.2024

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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