When installing LPG valves on a gas tank, a reliable thread sealant is essential.
We are often asked: Is Loctite 55 suitable? Or: What do you use at LPG Techniek Van Meenen?
Let us clarify.
What do we use?
For sealing threads on LPG tanks, we use a professional anaerobic liquid sealant from Berner.
👉 It cures in contact with metal and in the absence of oxygen, creating a gas-tight and vibration-resistant connection.
🔗 View the product here:
https://shop.vanmeenen.com/en/mounting-67/fixation-34/berner-thread-sealant-50-ml-4270
Loctite alternative?
A comparable product from Loctite is Loctite 577.
👉 This is also an anaerobic liquid sealant, specially designed for metal threads in gas and fluid systems.
And Loctite 55?
Loctite 55, a Teflon sealing cord, is also approved for LPG applications.
It is wrapped mechanically around the thread and provides a solid seal.
👉 However, for permanent installation of LPG valves, we prefer a liquid sealant like Berner 4270 or Loctite 577, because it cures and offers better resistance to vibrations and temperature changes.
Summary:
| Product | Type of sealant | Suitable for LPG? | Remark |
|---|---|---|---|
| Berner 4270 | Anaerobic liquid | ✅ Yes | Our standard choice |
| Loctite 577 | Anaerobic liquid | ✅ Yes | Fully equivalent alternative |
| Loctite 55 | Teflon sealing cord | ✅ Yes | Usable, but does not cure |