---
product_id: 395204747
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: "₨57508"
currency: LKR
in_stock: true
reviews_count: 5
category: "Loctite"
url: https://www.desertcart.lk/products/395204747-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer
store_origin: LK
region: Sri Lanka
---

# Approved for drinking water use Vibration resistant secure hold Temp resistant -50 to +150°C 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:** ₨57508
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock in your pipes with confidence—seal smart, seal strong!

## 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?** ₨57508 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/395204747-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

- • **Certified Safe:** DVGW, WRAS, and NSF approved for safe use in drinking water and food-related environments.
- • **Temperature Tough:** Withstands extreme temps from freezing cold to boiling hot water without losing elasticity.
- • **One-Component Ease:** No mixing needed—just apply and let humidity cure for a hassle-free, permanent seal.
- • **Vibration-Proof Seal:** Keeps pipe connections rock-solid even under constant vibration and pressure.
- • **Universal Compatibility:** Seals both plastic and metal threads flawlessly for versatile industrial and home use.

## Overview

LOCTITE SI 5331 is a high-performance silicone thread sealant designed for hot and cold water pipes made of plastic and metal. It cures via ambient humidity to form a low-strength, permanently elastic, vibration-resistant seal that withstands temperatures from -50°C to 150°C. Certified safe for drinking water and food processing environments, it comes in convenient 12x100ml tubes for industrial and professional plumbing applications.

## 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: 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.
Review: Livraison et produit parfait

## 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 |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #127,224 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #634 in Hardware Sealers |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (243) |
| 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 |

## Product Details

- **Brand:** LOCTITE
- **Item form:** Paste
- **Material:** Metal,Plastic,Silicone
- **Special features:** 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/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 2](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 3](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 4](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 5](https://m.media-amazon.com/images/I/81G1OV8sU4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*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.

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

Livraison et produit parfait

### ⭐ Review
*by C***N on 12 September 2023*

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

## 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-01*