What is Loctite 5188 used for?

You use this flexible gasketing sealant on rigid metal flanged connections, such as gearboxes, engine casings, and oil pans.

How does this sealant cure?

It is an anaerobic sealant that cures in the absence of air between close-fitting metal surfaces.

Is Loctite 5188 suitable for aluminium flanges?

Yes, it delivers excellent adhesion on aluminium and steel substrates.

What is the operating temperature range?

It withstands operating temperatures from -55 °C to +150 °C.

What is the maximum gap fill capability?

It can seal gaps up to 0.25 mm on unprimed surfaces.

LOCTITE 5188 flexible surface sealant (300 ml standard tube) - 1104312

Name: LOCTITE 5188 flexible surface sealant (300 ml standard tube) - 1104312
Brand: LOCTITE
SKU: 02020522
Price: 194.95 EUR
Availability: InStock

Supplier number: LOCTITE 1104312 | EAN 5010266427645

Recommended Retail Price €246.43

194.95 tax incl.

€161.12 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered as of 03/10/2026
Free shipping
Delivery by DHL

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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.

Durable sealing with Loctite 5188

Practical benefits

High flexibility and adhesion: You achieve a flexible seal with outstanding adhesion on aluminium and rigid metal flange connections.
Excellent chemical resistance: You reliably protect joints against harsh motor oils, transmission fluids, and glycol coolants.
Instant low pressure seal: With anaerobic curing, you can perform immediate leak tests right after assembly.

In a nutshell

The right choise for

With the Loctite 5188 flexible gasketing sealant, you create a dependable and elastic seal between rigid metal flanges. This anaerobic sealant is engineered for demanding applications such as gearboxes, engine casings, and oil pans, providing exceptional adhesion on aluminium and steel. Thanks to its high flexibility, it absorbs dynamic movements and vibrations to reliably prevent fluid and coolant leaks. Curing in the absence of air, it delivers an instant low-pressure seal so you can run leak tests immediately after assembly. Supplied in a convenient 300 ml cartridge, it fills gaps up to 0.25 mm with ease.

Product information FAQ

€194.95

In stock - tax incl.

Key features according to our expert

Net volume: 300 ml
ADR packing group: Not applicable
UN number: Not applicable
Principal hazard property: GHS08 Health hazard
ADR class: Not applicable
P-statements: P101; P102; P261; P273; P280; P302 + P352; P333 + P313; P337 + P313; P501
H-statements: H315; H317; H319; H335; H361D; H412
Hazard class: GHS07 Harmful or irritant; GHS08 Health hazard
Physical state: Liquid
Flash point: > 93 °C
Packaging: Cartridge

Product description:

LOCTITE 5188 - Gasketing product - Henkel
LOCTITE 5188 is a highly flexible sealant which cures when confined in the absence of air between close-fitting metal surfaces.
It is designed for use on rigid metal flanged connections, particularly where minor oil contamination of the flange surfaces can occur.
The product is particularly suitable for use on aluminium substrates where very good adhesion is needed.
It ensures an instant, low-pressure seal.
For sealing rigid flange faces on transmissions and engine casings.

Precautionary statements

P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P302 + P352: IF ON SKIN: Wash with plenty of water/…
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P337 + P313: If eye irritation persists: Get medical advice/attention.
P501: Dispose of contents/container to ... (see safety data sheet).

Hazard statements

H315: Causes skin irritation.
H317: May cause an allergic skin reaction.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
H361D: Suspected of damaging the unborn child.
H412: Harmful to aquatic life with long lasting effects.

All Features

Net volume: 300 ml
Adr packing group: Not applicable
Un number: Not applicable
Principal hazard property: GHS08 Health hazard
Adr class: Not applicable
P-statements: P101; P102; P261; P273; P280; P302 + P352; P333 + P313; P337 + P313; P501
H-statements: H315; H317; H319; H335; H361D; H412
Hazard class: GHS07 Harmful or irritant; GHS08 Health hazard
Physical state: Liquid
Flash point: > 93 °C
Packaging: Cartridge

Brand LOCTITE
02020522
EAN 5010266427645
Supplier number LOCTITE 1104312

Frequently asked questions about this product

Answered by specialists

What is Loctite 5188 used for?: You use this flexible gasketing sealant on rigid metal flanged connections, such as gearboxes, engine casings, and oil pans.
How does this sealant cure?: It is an anaerobic sealant that cures in the absence of air between close-fitting metal surfaces.
Is Loctite 5188 suitable for aluminium flanges?: Yes, it delivers excellent adhesion on aluminium and steel substrates.
What is the operating temperature range?: It withstands operating temperatures from -55 °C to +150 °C.
What is the maximum gap fill capability?: It can seal gaps up to 0.25 mm on unprimed surfaces.