--- product_id: 264507590 title: "J-B Weld Hi-Temp RTV Silicone" brand: "j-b weld" price: "$15.75" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/264507590-j-b-weld-hi-temp-rtv-silicone store_origin: US region: United States of America --- # Waterproof, weather-resistant seal Withstands up to 550ºF continuous heat Sensor-safe & shrink-proof durability J-B Weld Hi-Temp RTV Silicone **Brand:** j-b weld **Price:** $15.75 **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?** $15.75 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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 - • **Sensor-Safe Formula:** Safe to use around sensitive automotive sensors, ensuring no interference with your high-tech systems. - • **Heat-Defying Performance:** Handles extreme temps up to 550ºF continuous, 650ºF intermittent—built for the heat you face daily. - • **Reliable Waterproof Seal:** Cures into a tough, flexible gasket that resists cracking, shrinking, and weathering—perfect for long-lasting protection. - • **Trusted Legacy of Strength:** Over 40 years of industry-leading bonding power trusted by professionals who demand the best. - • **Effortless Application & Cure:** Air moisture-activated curing means no hassle—just apply and let it form a perfect seal on metal and more. ## Overview J-B Weld 31314 High Temperature RTV Silicone Gasket Maker & Sealant is a professional-grade, red silicone sealant designed for mechanical assemblies exposed to extreme heat up to 550ºF continuous and 650ºF intermittent. It cures upon exposure to air moisture, forming a waterproof, weather-resistant, and sensor-safe gasket that won’t shrink or crack. Trusted for over 40 years, this 3 oz. tube delivers durable, reliable sealing for automotive and industrial applications. ## Description 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. ## 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 | #23 in Automotive (See Top 100 in Automotive) #1 in Automotive Fillers, Adhesives & Sealants | | Brand Name | J-B Weld | | Color | Red | | Compatible Material | Metal | | Country Of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (16,070) 4.3 out of 5 stars | | 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 | | Manufacturer | J-B Weld | | Material Type | Silicone | | Model | 31314 | | Number Of Items | 1 | | Number Of Packs | 1 | | Part Number | 31314 | | Style Name | Tube | | Surface Recommendation | Door | | Unit Count | 1 Count | | Upc | 043425313140 043425700193 | | Warranty Description | No Warranty | | 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 on Reviewed in the United Arab Emirates 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. ### ⭐⭐⭐⭐⭐ Quality product *by on Reviewed in the United Arab Emirates 20 September 2026* Quality products ### ⭐⭐⭐⭐ Solid product but kinda thick *by on Reviewed in the United Arab Emirates 4 September 2026* Does the job but be careful as it is very thick. I tried to use with a smaller cut in the application nozzle and blew out the base - kinda messy. ## 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.us/products/264507590-j-b-weld-hi-temp-rtv-silicone](https://www.desertcart.us/products/264507590-j-b-weld-hi-temp-rtv-silicone) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-30*