---
product_id: 529780577
title: "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"
brand: "loctite"
price: "R466"
currency: ZAR
in_stock: false
reviews_count: 6
url: https://www.desertcart.co.za/products/529780577-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer
store_origin: ZA
region: South Africa
---

# Water-resistant Vibration-resistant Silicone-based 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

**Brand:** loctite
**Price:** R466
**Availability:** ❌ Out of Stock

## Summary

> Seal the Deal with Confidence! 🔒

## Quick Answers

- **What is this?** 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 by loctite
- **How much does it cost?** R466 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/529780577-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer)

## 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

- • **Ideal for Industry:** Perfect for agriculture and wastewater systems.
- • **Convenient Packaging:** 12x100ml tubes for extensive use.
- • **Low-Strength Sealant:** Forms a flexible, long-lasting seal.
- • **Vibration Resistance:** Ensures secure connections under pressure.
- • **Universal Application:** Perfect for both hot and cold water systems.

## Overview

Loctite SI 5331 is a versatile liquid thread sealant designed for both plastic and metal pipes, providing a reliable seal for hot and cold water applications. This silicone-based sealant hardens with humidity, ensuring a durable and flexible connection that withstands vibration, making it ideal for industrial use in plumbing, agriculture, and wastewater systems.

## 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: Recieved ONLY 2 tubes! - Only received 2 tubes! Make this right and ill order more and update this rating.
Review: 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.

## Features

- 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, only for industrial usage, plumbing thread sealant based on acetoxy silicone, one-component sealant, paste-like consistency, white, 12x100ml tube

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0052EGAXK |
| Best Sellers Rank | #1,651,795 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3,005 in Hardware Sealers |
| Brand | Loctite |
| Color | White |
| Date First Available | August 7, 2012 |
| Full Cure Time | 96 Hours |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1200 Milliliters |
| Item Weight | 3.52 ounces |
| Item model number | 5331 |
| Manufacturer | Henkel |
| Material | Metal,Plastic,Silicone |
| Number of Pieces | 12 |
| Package Information | Tube |
| Product Dimensions | 1.38 x 1.38 x 6.89 inches |
| Special Feature | Strong |
| Specific Uses For Product | Craft |
| Unit Count | 3.3814 Fluid Ounces |
| Viscosity | 50000 mPa•s |
| Viscosity Level | Low to Medium |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Loctite
- **Item Form:** Liquid
- **Material:** Metal,Plastic,Silicone
- **Special Feature:** Strong
- **Specific Uses For Product:** Craft

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/61jOKpRl5KS.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/71wA5-8AkeS.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/61OVL2yrdrS.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/711jwgLp2IS.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/81G1OV8sU4L.jpg)

## Customer Reviews

### ⭐ Recieved ONLY 2 tubes!
*by C***N on September 12, 2023*

Only received 2 tubes! Make this right and ill order more and update this rating.

### ⭐⭐⭐⭐⭐ Review
*by A***N on February 26, 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.

### ⭐⭐⭐⭐ Review
*by D***N on July 3, 2022*

Livraison et produit parfait

## 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 South Africa*
*Store origin: ZA*
*Last updated: 2026-03-19*