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🔒 Seal it once, trust it forever — the pro’s choice for leak-proof pipes!
LOCTITE SI 5331 is a high-performance silicone thread sealant designed for industrial and professional use on plastic and metal water pipes. It forms a permanently elastic, vibration-resistant seal effective from -50°C to 150°C, suitable for hot and cold water systems. Certified safe for drinking water applications, this one-component, paste-like sealant cures via humidity and comes in convenient 12x100ml tubes, ensuring secure, leak-proof connections in plumbing, agriculture, and wastewater installations.
| ASIN | B0052EGAXK |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #132,661 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #639 in Hardware Sealers |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (247) |
| Date First Available | 7 August 2012 |
| Item model number | 5331 |
| Material Type(s) | Metal,Plastic,Silicone |
| Number of Puzzle Pieces | 12 |
| Product Dimensions | 3.5 x 3.5 x 17.5 cm; 99.79 g |
A**N
Having tried using Loctite 55 on a swimming pool MPV and having the valve still leak at the threaded joints, I opted to try out this liquid sealant. I put the liquid on both the make and female joints and easily screwed them in by hand. I waited 24hr before I turned on the pump & when I did, there were no leaks from any of the joints. I’ve bought another tube as backup, I’ll be using this stuff instead of PTFE Tape and silicone from now on.
D**N
Livraison et produit parfait
C**N
Only received 2 tubes! Make this right and ill order more and update this rating.
F**E
Im Camper-Selbstausbau werden aus Gewichtsgründen häufig Kunststoff-Fittings eingesetzt. Nachdem ich zuerst Dichtfaden genutzt hatte und als Nicht-Klempner keine wirklich guten Ergebnisse erzielt habe, entdeckte ich dieses Mittel! Perfekt! Es ist alles beim ersten Durchgang dicht und ich habe ein sehr sehr gutes Gefühl, dass mir kein Wasser ins Auto läuft. Man „sieht“ die Paste ja rausquillen, somit ist es wirklich dicht. Empfehlenswert für diesen Einsatz!
M**O
Ottimo e semplice da usare
Trustpilot
3 weeks ago
2 days ago