--- product_id: 53716214 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: "AR$229907" currency: ARS in_stock: true reviews_count: 11 url: https://www.desertcart.com.ar/products/53716214-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer store_origin: AR region: Argentina --- # Seals hot & cold water pipes 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:** AR$229907 **Availability:** ✅ In Stock ## Summary > 🔒 Lock in leak-free confidence with Loctite SI 5331! ## 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?** AR$229907 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/53716214-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 - • **Universal Compatibility:** Seals plastic & metal threads flawlessly for versatile industrial use - • **Permanently Elastic Seal:** Cures via humidity to maintain a flexible, low-strength hold that adapts to pipe movement - • **High-Temperature Endurance:** Reliable performance from freezing cold to 150°C hot water systems - • **Vibration-Proof Connections:** Secures fittings against loosening in high-vibration environments - • **Certified Safe for Drinking Water:** WRAS, DVGW & NSF P1 approvals ensure trusted use in potable water systems ## Overview LOCTITE SI 5331 is a premium one-component silicone thread sealant designed for sealing plastic and metal water pipes in industrial, agricultural, and wastewater systems. It forms a permanently elastic, vibration-resistant seal effective from -50°C to 150°C, suitable for both hot and cold water applications. Certified safe for drinking water, it cures in 96 hours via ambient humidity and comes in convenient 12x100ml tubes, ensuring secure, durable pipe connections that professionals trust. ## Description LOCTITE SI 5331 - Thread sealant for plastic piping Loctite 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 threads Ideal for plastic piping For metal, plastic or both Temperature resistant from -50 to +150°C One-component & low strength Vibration resistant Colour: White Format: 12x100ml tube *WRAS approval (BS 6920) for drinking water: 0706521 **DVGW approval, tested according to EN 751-1 ***P1 NSF Reg. No.: 123620 ## 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, 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 | 61,196 in DIY & Tools (See Top 100 in DIY & Tools) 876 in Sealers 5,455 in Nails, Screws & Fasteners | | Brand | Loctite | | Colour | White | | Compatible Material | Metal | | Country Of Origin | Italy | | Customer Reviews | 4.5 4.5 out of 5 stars (266) 4.5 out of 5 stars | | Included Components | 1x LOCTITE SI 5331 | | Item Dimensions | 35 x 35 x 175 millimetres | | Item Form | Paste | | Item Type Name | LOCTITE SI 5331 | | Item Weight | 0.22 Pounds | | Manufacturer | Henkel | | Manufacturer Part Number | 2061031 | | Material | Metal,Plastic,Silicone | | Model Number | 5331 | | Number Of Items | 1 | | Number Of Packs | 1 | | Style Name | Industrial | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** Loctite - **Item form:** Paste - **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/61CB6+5A5pL.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/71t1DHmDp7L.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/618JPXaA70L.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/6123U-8xG+L.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/71wMzNVRHcL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ The best leak prevention on swimming pool fittings *by on Reviewed in the United Kingdom 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 on Reviewed in the United Kingdom 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 on Reviewed in the United Kingdom 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/53716214-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer](https://www.desertcart.com.ar/products/53716214-loctite-si-5331-liquid-thread-sealant-for-pipes-silicone-sealer) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-10-05*