Is this thread sealant approved for potable water?

Yes, it holds approvals such as DVGW (EN 751-1) and WRC (BS 6920) for potable water applications.

How does Loctite SI 5331 cure?

It cures at ambient temperatures through atmospheric moisture to form a flexible, low-strength seal.

Can connections be disassembled after curing?

Yes, the low-strength formulation allows easy disassembly using standard hand tools.

How do you apply this sealant?

Apply the product directly from the tube to both male and female threads, then assemble the fittings.

LOCTITE 5331 thread sealant (100 ml tube) - 2061034

Name: LOCTITE 5331 thread sealant (100 ml tube) - 2061034
Brand: LOCTITE
SKU: 11010247
Price: 22.8 EUR
Availability: InStock
Rating: 8 (1 reviews)

Supplier number: LOCTITE 2061034 | EAN 5010266238739

1 review(s)

From 1 piece €22.80

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22.80 tax incl.

€18.84 excl. VAT (incl. all environmental contributions)

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Reliable thread sealing with Loctite SI 5331

Practical benefits

Flexible and leakproof joints: You create an elastic, durable barrier against leaks in hot and cold water pipe installations with this specialized silicone sealant.
Safe on diverse materials: You apply it confidently across both plastic and metal threaded fittings without risking chemical damage to fragile threads.
Effortless disassembly for servicing: Due to its low-strength formulation, you easily dismantle fittings using standard hand tools whenever maintenance or adjustments are needed.

In a nutshell

The right choise for

With the Loctite si 5331 thread sealant in a practical 100 ml tube, you create flexible, leakproof joints in hot and cold water installations. This liquid silicone sealant is engineered specifically for plastic threaded fittings and plastic-to-metal combinations, preventing leaks without damaging fragile threads during assembly. It cures at room temperature with atmospheric moisture, delivering immediate sealing against low water pressure. Approved for potable water under dvgw (EN 751-1) and wrc (BS 6920) standards, it is suitable for sanitary, drainage, and irrigation pipe systems. Its low-strength formulation protects connections against vibration-induced loosening while allowing effortless disassembly with standard hand tools whenever maintenance is required.

Product information FAQ Reviews

€22.80

In stock - tax incl.

Key features according to our expert

Net volume: 100 ml
EUH-statements: EUH441
Relative density: 1,14
ADR packing group: Not applicable
ADR class: Not applicable
Principal hazard property: GHS05 Corrosive
UN number: Not applicable
P-statements: P201; P273; P280; P302 + P352; P305 + P351 + P338
H-statements: H315; H318; H373; H412
Hazard class: GHS05 Corrosive; GHS08 Health hazard
Physical state: Liquid
Flash point: > 100 °C
Packaging: Tube

Product description:

LOCTITE SI 5331 is designed for the locking and sealing of plastic and metal fittings carrying hot or cold water, e.g. industrial and agricultural plastic water pipe systems or drainage systems.
It carries certain approvals and certifications: WRC listed, meets BS 6920 for potable water: 0706521 DVGW approval, tested in accordance with EN 751-1; P1 NSF Reg. No.: 123620

Precautionary statements

P201: Obtain special instructions before use.
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/…
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Hazard statements

H315: Causes skin irritation.
H318: Causes serious eye damage.
H373: May cause damage to organs through prolonged or repeated exposure.
H412: Harmful to aquatic life with long lasting effects.

All Features

Net volume: 100 ml
Euh-statements: EUH441
Relative density: 1,14
Adr packing group: Not applicable
Adr class: Not applicable
Principal hazard property: GHS05 Corrosive
Un number: Not applicable
P-statements: P201; P273; P280; P302 + P352; P305 + P351 + P338
H-statements: H315; H318; H373; H412
Hazard class: GHS05 Corrosive; GHS08 Health hazard
Physical state: Liquid
Flash point: > 100 °C
Packaging: Tube

Brand LOCTITE
11010247
EAN 5010266238739
Supplier number LOCTITE 2061034

Frequently asked questions about this product

Answered by specialists

What is Loctite SI 5331 used for?: It is designed to lock and seal plastic threaded fittings and plastic-to-metal combinations carrying hot or cold water.
Is this thread sealant approved for potable water?: Yes, it holds approvals such as DVGW (EN 751-1) and WRC (BS 6920) for potable water applications.
How does Loctite SI 5331 cure?: It cures at ambient temperatures through atmospheric moisture to form a flexible, low-strength seal.
Can connections be disassembled after curing?: Yes, the low-strength formulation allows easy disassembly using standard hand tools.
How do you apply this sealant?: Apply the product directly from the tube to both male and female threads, then assemble the fittings.