--- product_id: 264507590 title: "J-B Weld Hi-Temp RTV Silicone" brand: "j-b weld" price: "$33.56" currency: USD in_stock: true reviews_count: 13 category: "J B Weld" url: https://www.desertcart.ec/products/264507590-j-b-weld-hi-temp-rtv-silicone store_origin: EC region: Ecuador --- # 100% waterproof & weather-resistant seal Withstands up to 550ºF continuous heat Sensor-safe & crack-proof durability J-B Weld Hi-Temp RTV Silicone **Brand:** j-b weld **Price:** $33.56 **Availability:** ✅ In Stock ## Summary > 🔥 Seal the deal with J-B Weld — where heat meets unbeatable hold! 🛠️ ## Quick Answers - **What is this?** J-B Weld Hi-Temp RTV Silicone by j-b weld - **How much does it cost?** $33.56 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/264507590-j-b-weld-hi-temp-rtv-silicone) ## Best For - j-b weld enthusiasts ## Why This Product - Trusted j-b weld brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Legacy Bond:** Backed by 40+ years of innovation and reliability, J-B Weld delivers the world’s strongest silicone seal for professionals who demand excellence. - • **Heat-Defying Sealant:** Engineered to endure extreme temperatures up to 550ºF continuous and 650ºF intermittent—perfect for high-performance mechanical assemblies. - • **Versatile Application:** Ideal for automotive, plumbing, and household repairs—seals metal, withstands weathering, and remains sensor-safe for sensitive components. - • **Moisture-Cured Toughness:** Cures on contact with air moisture to form a resilient, waterproof gasket that won’t shrink, crack, or fail under pressure. - • **User-Friendly & Long-Lasting:** Easy to apply with a tube design; dries fast but gains full strength overnight, ensuring a durable, mess-resistant finish that holds heavy loads. ## Overview J-B Weld 31314 High Temperature RTV Silicone Gasket Maker & Sealant is a professional-grade, red silicone sealant designed for high-heat mechanical applications. It withstands continuous temperatures up to 550ºF and intermittent spikes to 650ºF, curing via moisture in air to form a waterproof, crack-resistant, and sensor-safe gasket. Trusted for over 40 years, this 3 oz. tube offers a durable, weatherproof seal ideal for automotive, plumbing, and household use. ## Description From the manufacturer J-B Weld Silicone Sealant & Adhesive J-B Weld Hi-Temp Red Silicone Gasket Maker & Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550°F or 650° intermittent might exist. Upon curing, which occurs when the product is exposed to the moisture in the air, the silicone forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering, is sensor safe, and is great for many automotive applications. Review: Works great - At first i used it with the nozzle but its hard to squish it out so I had to cut it from the second circle to make the hole bigger which worked, please do not force it through the smallest hole since Ive seen some comments complaining that it bursted open and made a mess. I would recommend you remove the nozzle when you are almost done and clean it properly by passing tissue through it, using some of that product leftover. While this might be messy and a bit wasteful it will prevent both the tube and the nozzle from drying up since the nozzle doesnt have a seal. Now i use it without without nozzle and it still works nice for areas that dont require precise application or tight areas and its an amazing adhesive, it says it dries in 1h but id recommend leaving it at least half a day, do the work at night and leave it overnight maybe. Ive used it to glue some shelfs in the kitchen and put spices and sauces which can be quite heavy, left milk and other heavy items to test the durability and its been 3 weeks holding all that weight, also used the glue to seal corners in the bathroom and its completely waterproof once dry. The next time u open the tube there will be a dried up crust on the top, if u squeeze a bit it should come out, i didnt throw it away and actually placed it back once im done using the product and this actually works as a second seal that prevents another dry crust. Overall amazing product. Review: 5/5⭐️ - Good ## Features - HI TEMP RED SILICONE GASKET MAKER & SEALANT: Is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist - COUNT ON US: For more than 40 years, our products have earned a loyal following from people who take pride in their work. With each product we innovate, we continue to provide the world's strongest bond for your projects - EASY TO USE: Curing when the product is exposed to the moisture in air, it forms a tough, waterproof seal on most surfaces. It will not shrink or , resists weathering and is sensor safe ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ID8IUJY | | Best Sellers Rank | #14 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Fillers, Adhesives & Sealants | | Brand | J-B Weld | | Brand Name | J-B Weld | | Color | Red | | Compatible Material | Metal | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 15,862 Reviews | | Global Trade Identification Number | 00043425313140 | | Included Components | 1 Tube | | Item Dimensions | 50 x 40 x 160 millimeters | | Item Form | Liquid | | Item Type Name | Hi-Temp Red RTV Silicone Gasket Maker and Sealant | | Item Weight | 90 Grams | | Item dimensions L x W x H | 50 x 40 x 160 millimeters | | Item weight | 90 Grams | | Manufacturer | J-B Weld | | Material | Silicone | | Material Type | Silicone | | Model | 31314 | | Number of Items | 1 | | Part Number | 31314 | | Style | Tube | | Style Name | Tube | | Surface Recommendation | Door | | UPC | 043425313140 043425700193 | | Unit Count | 1 Count | | Warranty Description | No Warranty | | Water Resistance Level | Waterproof | | Water resistance level | Waterproof | ## Product Details - **Brand:** J-B Weld - **Item dimensions L x W x H:** 50 x 40 x 160 millimeters - **Item weight:** 90 Grams - **Material:** Silicone - **Style:** Tube ## Images ![J-B Weld Hi-Temp RTV Silicone - Image 1](https://m.media-amazon.com/images/I/715hV11MEoL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: is it water proof ?** A: YES IT IS ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by A***I on 4 February 2025* At first i used it with the nozzle but its hard to squish it out so I had to cut it from the second circle to make the hole bigger which worked, please do not force it through the smallest hole since Ive seen some comments complaining that it bursted open and made a mess. I would recommend you remove the nozzle when you are almost done and clean it properly by passing tissue through it, using some of that product leftover. While this might be messy and a bit wasteful it will prevent both the tube and the nozzle from drying up since the nozzle doesnt have a seal. Now i use it without without nozzle and it still works nice for areas that dont require precise application or tight areas and its an amazing adhesive, it says it dries in 1h but id recommend leaving it at least half a day, do the work at night and leave it overnight maybe. Ive used it to glue some shelfs in the kitchen and put spices and sauces which can be quite heavy, left milk and other heavy items to test the durability and its been 3 weeks holding all that weight, also used the glue to seal corners in the bathroom and its completely waterproof once dry. The next time u open the tube there will be a dried up crust on the top, if u squeeze a bit it should come out, i didnt throw it away and actually placed it back once im done using the product and this actually works as a second seal that prevents another dry crust. Overall amazing product. ### ⭐⭐⭐⭐⭐ 5/5⭐️ *by E***N on 15 February 2026* Good ### ⭐⭐⭐⭐⭐ perfect size and quality *by G***. on 13 November 2025* perfect size and quality ## Frequently Bought Together - J-B Weld 31314 High Temperature RTV Silicone Gasket Maker and Sealant - Red - 3 oz. - 1/4" ID Silicon Tubing, JoyTube Food Grade Silicon Tubing 1/4" ID x 3/8" OD 10 Feet High Temp Pure Silicone Hose Tube for Home Brewing Winemaking - ANPTGHT 1/4” Thru-Bulk Bulkhead Plastic Hose Barb Fittings Union Adapter Fittings for Aquarium Fuel Gas Liquid Air with Metal washers (Pack of 6) --- ## 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.ec/products/264507590-j-b-weld-hi-temp-rtv-silicone](https://www.desertcart.ec/products/264507590-j-b-weld-hi-temp-rtv-silicone) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-07-22*