What is Loctite 5800 used for?

This liquid gasketing compound is designed for sealing close-fitting joints between rigid metal faces and flanges, such as gearbox and engine casings.

What does the H&S designation mean?

It stands for Health & Safety. The formulation carries no hazard symbols, risk phrases, or safety phrases on its safety data sheet.

How does this gasketing compound cure?

Loctite 5800 cures anaerobically at room temperature when confined in the absence of air between close-fitting metal surfaces.

Which materials are compatible with this sealant?

It is suitable for rigid metal surfaces including steel, stainless steel, aluminium, and brass.

Does it provide immediate pressure resistance after assembly?

Yes, it provides an instant seal against low pressures immediately after assembly prior to full cure.

LOCTITE 5800 surface sealant (50 ml bottle) - 1948758

Name: LOCTITE 5800 surface sealant (50 ml bottle) - 1948758
Brand: LOCTITE
SKU: 02286001
Price: 37.2 EUR
Availability: InStock

Supplier number: LOCTITE 1948758 | EAN 5010266010038

37.20 tax incl.

€30.74 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered as of 05/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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How does it work?

For a purchase value of €99 to €125 excl. VAT, receive FREE LOCTITE 55 thread sealing cord 50 m (IDH 528244) worth €9.99.
For a purchase value of more than €125 excl. VAT, receive FREE LOCTITE SF 7850 hand cleaner 400 ml (IDH 2098250) worth €13.21.
The free item is automatically added to your order. No registration is required.
The promotion is valid from 01.10.2026 to 31.10.2026.
Loctite Buy & Get deals are recognisable by the promotion label on the product page. Click the label to view all available deals.

Reliable Loctite gasketing for flanges

Practical benefits

Instant low pressure seal: You can test assemblies immediately after fitting because the sealant provides instant low-pressure resistance.
Safer handling without hazard symbols: You work with greater peace of mind thanks to a formulation carrying no hazard or safety symbols.
High thermal and chemical resistance: You achieve a durable seal that withstands demanding operating temperatures between -55 °C and 180 °C.

In a nutshell

The right choise for

With the Loctite 5800 flange sealant, you create an instant, reliable formed-in-place gasket on rigid metal mating surfaces and flanges. Thanks to its immediate low-pressure resistance, you can test gearboxes, engine casings, and pump housings right after assembly without delays. This anaerobic liquid cures at room temperature between close-fitting components made of steel, stainless steel, aluminium, or brass. With its Health & Safety formulation free of hazard symbols and safety phrases, you work safer in demanding environments. The cured seal provides outstanding chemical and thermal resistance from -55 °C to 180 °C, preventing fluid and gas leaks for the long term.

Product information FAQ

€37.20

In stock - tax incl.

Key features according to our expert

Net volume: 50 ml
Relative density: 1,1
ADR packing group: Not applicable
UN number: Not applicable
ADR class: Not applicable
Physical state: Liquid
Flash point: > 100 °C
Packaging: Bottle

Product description:

LOCTITE 5800 - Gasketing product - Health and Safety - Henkel
LOCTITE SI 5800 seals close-fitting joints between rigid metal faces and flanges.
It cures when confined in the absence of air between close-fitting metal surfaces.
Used as a form-in-place gasket on rigid flanged connections.
Provides resistance to low pressures immediately after assembly.
Its key differentiator is the "White" Material Safety Data Sheet.
It carries no hazard symbols, risk or safety phrases and does not contain any declarable carcinogens, mutagens or reproductive toxins.

All Features

Net volume: 50 ml
Relative density: 1,1
Adr packing group: Not applicable
Un number: Not applicable
Adr class: Not applicable
Physical state: Liquid
Flash point: > 100 °C
Packaging: Bottle

Brand LOCTITE
02286001
EAN 5010266010038
Supplier number LOCTITE 1948758

Frequently asked questions about this product

Answered by specialists

What is Loctite 5800 used for?: This liquid gasketing compound is designed for sealing close-fitting joints between rigid metal faces and flanges, such as gearbox and engine casings.
What does the H&S designation mean?: It stands for Health & Safety. The formulation carries no hazard symbols, risk phrases, or safety phrases on its safety data sheet.
How does this gasketing compound cure?: Loctite 5800 cures anaerobically at room temperature when confined in the absence of air between close-fitting metal surfaces.
Which materials are compatible with this sealant?: It is suitable for rigid metal surfaces including steel, stainless steel, aluminium, and brass.
Does it provide immediate pressure resistance after assembly?: Yes, it provides an instant seal against low pressures immediately after assembly prior to full cure.