---
product_id: 53716214
title: "SI 5331, Liquid Thread Sealant for Pipes, Silicone Sealer for Cold and Hot Water Carrying Plastic and Metal Pipes, Vibration Resistant Silicone Sealant, 12x100ml"
brand: "loctite"
price: "VT28510"
currency: VUV
in_stock: true
reviews_count: 10
category: "Loctite"
url: https://www.desertcart.vu/products/53716214-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer-cold
store_origin: VU
region: Vanuatu
---

# Seals hot & cold water pipes Vibration resistant secure hold Temp resistant -50 to +150°C SI 5331, Liquid Thread Sealant for Pipes, Silicone Sealer for Cold and Hot Water Carrying Plastic and Metal Pipes, Vibration Resistant Silicone Sealant, 12x100ml

**Brand:** loctite
**Price:** VT28510
**Availability:** ✅ In Stock

## Summary

> 🔒 Lock in leak-free confidence with LOCTITE SI 5331!

## Quick Answers

- **What is this?** SI 5331, Liquid Thread Sealant for Pipes, Silicone Sealer for Cold and Hot Water Carrying Plastic and Metal Pipes, Vibration Resistant Silicone Sealant, 12x100ml by loctite
- **How much does it cost?** VT28510 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/53716214-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer-cold)

## Best For

- loctite enthusiasts

## Why This Product

- Trusted loctite brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Seals plastic & metal threads flawlessly for industrial & home use
- • **Permanently Elastic Seal:** Cures via humidity to maintain a flexible, leak-proof connection
- • **Ready-to-Use Convenience:** One-component paste, no mixing—apply and seal with confidence
- • **Vibration-Proof Security:** Locks joints tight even under constant movement or pressure
- • **Certified Safe for Drinking Water:** WRAS, DVGW & NSF P1 approvals ensure trusted hygiene standards

## Overview

LOCTITE SI 5331 is a high-performance silicone thread sealant designed for hot and cold water pipes made of plastic and metal. It forms a permanently elastic, vibration-resistant seal that withstands temperatures from -50°C to 150°C. Certified safe for drinking water systems, this one-component paste cures through ambient humidity, providing a reliable, easy-to-apply solution for industrial, agricultural, and residential plumbing needs.

## Description

LOCTITE SI 5331 - Thread sealant for plastic pipingLoctite SI 5331 is ideal as a thread sealant for various forms of water pipe insulation. The universal thread sealant is gel and can be used to seal hot and cold water-bearing plastic and metal threads and fittings, e.g. to secure plastic pipelines in industrial, agricultural or sewage systems. The sealant is single-component, so no mixing is necessary. It cures through humidity exposure at ambient temperatures to form a low-strength, permanently elastic seal which is effective against both cold and hot water. The low strength of the gasket is maintained at temperatures up to 150°C. In addition, the joints are protected against vibration loads. Based on acetoxy silicone, the silicone is white and has a paste-like consistency. LOCTITE SI 5331 is approved for use in drinking water systems*, DGVW approved** and NSF category P1 approved*** for use as a food processing sealant in areas where contact with food is not possible.Apply the sealant to the desired threaded parts (the parts may be as supplied or cleaned with a damp cloth or paper towel before application). The product should be applied to both male and female threads. To ensure an even distribution, brush down to the base of the thread. For use in drinking water installations, allow thread sealant to cure for 96 hours at 20 to 23°C before use.The Product Benefits at a Glance:Sealant for sealing threadsIdeal for plastic pipingFor metal, plastic or bothTemperature resistant from -50 to +150°COne-component & low strengthVibration resistantColour: WhiteFormat: 12x100ml tube*WRAS approval (BS 6920) for drinking water: 0706521**DVGW approval, tested according to EN 751-1***P1 NSF Reg. No.: 123620

Review: The best leak prevention on swimming pool fittings - 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.
Review: Good result - Used on the thread of a plastic end of steel tap in kitchen. Spread over threads of both male and female threads. Allowed to cure for 24hrs and so far plastic end of tap is remaining in place whereas previously it would fall off with water force.

## Features

- Causes serious eye damage.
- Causes skin irritation.
- May cause damage to organs through prolonged or repeated exposure.
- Universally applicable - The water pipe sealant is ideal for hot and cold water-bearing plastic threads or plastic/metal combinations, e.g. in industrial installations
- Low-strength thread sealant - The piping sealant hardens via air humidity to form a permanently elastic seal. This seals effectively against both cold and hot water
- Secure connections - The connections made with the thread seal are secured and resistant to vibration loads for a secure hold of the threads in plumbing fittings
- Securing and sealing - The piping thread leak sealer is ideal for securing and sealing plastic piping and pipelines in industry, agriculture or wastewater systems
- Package contents - LOCTITE SI 5331, plumbing thread sealant based on acetoxy silicone, one-component sealant, paste-like consistency, white, 12x100ml tube

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0052EGAXK |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 64,617 in DIY & Tools ( See Top 100 in DIY & Tools ) 933 in Sealers 5,596 in Nails, Screws & Fasteners |
| Colour | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (246) |
| Date First Available | 26 July 2012 |
| Included Components | 1x LOCTITE SI 5331 |
| Item Package Quantity | 1 |
| Item Weight | 99.8 g |
| Item model number | 5331 |
| Manufacturer | Loctite |
| Material | Metal,Plastic,Silicone |
| Number of Pieces | 12 |
| Part Number | 2061031 |
| Product Dimensions | 3.5 x 3.5 x 17.5 cm; 99.79 g |
| Size | 100 ml |
| Special Features | Strong |
| Style | Industrial |
| Usage | Craft |
| Volume | 100 Millilitres |

## Product Details

- **Brand:** Loctite
- **Item form:** Paste
- **Material:** Metal,Plastic,Silicone
- **Special feature:** Strong
- **Specific uses for product:** Craft

## Images

![SI 5331, Liquid Thread Sealant for Pipes, Silicone Sealer for Cold and Hot Water Carrying Plastic and Metal Pipes, Vibration Resistant Silicone Sealant, 12x100ml - Image 1](https://m.media-amazon.com/images/I/61CB6+5A5pL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The best leak prevention on swimming pool fittings
*by A***N on 26 February 2026*

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.

### ⭐⭐⭐⭐⭐ Good result
*by O***K on 14 March 2025*

Used on the thread of a plastic end of steel tap in kitchen. Spread over threads of both male and female threads. Allowed to cure for 24hrs and so far plastic end of tap is remaining in place whereas previously it would fall off with water force.

### ⭐⭐⭐⭐⭐ Great product thank you loctite
*by G***Y on 25 May 2023*

For sealing threaded joints between metal and plastic pipe fittings. There is nothing better and it's WRAS approved for when dealing with potable water. Simple perfect.

## Frequently Bought Together

- LOCTITE SI 5331, Liquid Thread Sealant for Pipes, Silicone Sealer for Cold and Hot Water Carrying Plastic and Metal Pipes, Vibration Resistant Silicone Sealant, 12x100ml
- LOCTITE 55 Pipe Thread Sealant, Non Curing Plumbers Tape for Plumbing Pipes and Fittings, Reliable Fast Action Cord for Metal and Plastic, 160m
- LOCTITE 577, Medium Strength Industrial Adhesive for Thread Sealing, Universal Liquid Adhesive for Pipes and Metal Threads, Chemically Resistant Thread Sealant, 50ml

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-05*