--- product_id: 46259170 title: "Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz." brand: "refrigeration technologies" price: "206.37 DT" currency: TND in_stock: true reviews_count: 8 category: "Refrigeration Technologies" url: https://www.desertcart.tn/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1 store_origin: TN region: Tunisia --- # No mess, water-activated formula Blocks direct & conductive heat Reusable up to 40 times Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz. **Brand:** refrigeration technologies **Price:** 206.37 DT **Availability:** ✅ In Stock ## Summary > 🔥 Mold. Protect. Repeat. Your heat-blocking game just leveled up! ♻️ ## Quick Answers - **What is this?** Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz. by refrigeration technologies - **How much does it cost?** 206.37 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1) ## Best For - refrigeration technologies enthusiasts ## Why This Product - Trusted refrigeration technologies brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Portable:** Lightweight 12 oz jar fits easily in your welding pack—always ready to protect on the go. - • **Reusable Efficiency:** Use up to 40 times—just re-moisten and mold, saving you time and money on every job. - • **Mess-Free Application:** No drips, no spills—our putty stays put, keeping your workspace clean and professional. - • **Ultimate Heat Shielding:** Protect sensitive valves and surfaces from extreme heat during brazing or welding with precision. - • **Versatile Torch Compatibility:** Perfectly compatible with MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane torches for all your heat-blocking needs. ## Overview The RT400P Viper Wetrag Heat Blocking Putty is a high-viscosity, reusable putty designed to protect sensitive components from direct and conductive heat during welding, brazing, or soldering. It offers up to 40 uses per 12 oz jar, features a no-mess water-activated formula, and is compatible with various torch types, making it an essential tool for professionals seeking reliable, efficient heat protection. ## Description Viper wet rag heat blocking putty is a reusable heat blocking putty that keeps piping and sensitive components cooler than a traditional wet rag during brazing, soldering or welding. Simply mold putty in front of area that needs to be protected from heat. Braze, solder or weld. Let heated areas cool. Remove putty and place back into jar. Re moisten with a few drops of water if putty becomes dry. Good for up to 40 uses. Features: Reusable protects surfaces, valves and other sensitive parts from heat damage blocks direct and conductive heat transfer no mess formula use with map/pro, oxy/acetylene, mig, tig, arc and propane torches non toxic. Review: Good product and works as advertised. - Super impressed with this product. Definitely work to keep heat away from filter drier. I've seen some videos where you can use actual wet rags. I prefer to have this and keep it in welding pack. Putty is reusable and has been good for me. Review: Did the job - Holds water, molds well to an eccentric surface, and keeps refrigerant valves cooler during brazing. Worked well on the liquid line repair job that I bought it for. Would recommend and use in conjunction with a wet rag to get the best cooling. ## Features - It is reusable - Protects surfaces, valves - Blocks direct and conductive heat transfer - No mess formula ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B017T23T18 | | Brand Name | Refrigeration Technologies | | Color | Gray | | Compatible Material | Ceramic, Metal, Plastic | | Container Type | Jar | | Customer Reviews | 4.6 4.6 out of 5 stars (624) | | Global Trade Identification Number | 00017857400082 | | Item Form | Putty | | Item Package Quantity | 1 | | Item Weight | 0.1 Pounds | | Manufacturer | Refrigeration Technologies | | Model | RT400P | | Other Special Features of the Product | Heat Resistant | | Specific Uses For Product | Repair, Welding | | UPC | 696335182315 017857400082 | | Unit Count | 12.0 Ounce | | Viscosity | High Viscosity | | Volume | 12 Fluid Ounces | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Refrigeration Technologies - **Color:** Gray - **Item Form:** Putty - **Special Feature:** Heat Resistant - **Specific Uses For Product:** Repair, Welding ## Images ![Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz. - Image 1](https://m.media-amazon.com/images/I/61SVbN76qCL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How long does this last or how many times can it be exposed to high heat?** A: As long as you put back in the jar and seal it. it lasts a very long time its been a year and it still works. braze all the time never had a problem its been exposed to high heat for at least 15mins still kept protected area intact. **Q: Does this leave residue or react with metal?** A: No. Just clean off any residual COMPLETELY> **Q: why is this is 20 dollars on ebay?** A: Can't answer that, but the ease of Amazon returns is worth purchasing some products at a higher price from them. I used this product to solder fittings near a TXV valve and it worked great. **Q: Is it conductive? can it be used to shield parts on a pcb while using a heat gun?** A: This is a paste type product. It leaves residue. Idk if its appropriate for a pcb. We use it to protect vulnerable parts when arc welding or torch cutting. It should be capable of protecting from a heat gun. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product and works as advertised. *by J***3 on March 23, 2026* Super impressed with this product. Definitely work to keep heat away from filter drier. I've seen some videos where you can use actual wet rags. I prefer to have this and keep it in welding pack. Putty is reusable and has been good for me. ### ⭐⭐⭐⭐⭐ Did the job *by D***L on January 19, 2026* Holds water, molds well to an eccentric surface, and keeps refrigerant valves cooler during brazing. Worked well on the liquid line repair job that I bought it for. Would recommend and use in conjunction with a wet rag to get the best cooling. ### ⭐⭐⭐⭐⭐ Best I have found *by E***C on November 23, 2025* Fantastic stuff! ## Frequently Bought Together - Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz. - Matace 2 Pack 12x14 Inch Fireproof Welding Blanket & Pad, 5mm Thickened Fire Resistant Carbon Felt Cloth, Flame Retardant Fabric for Stove Wick, Heat Shield for Soldering, Firepit, Smoker, Black - FLASLD Welding Blanket & Heat Shield Mat for Soldering Copper Pipe, 12''x12'' Flame Protector Pad Plumbing Hole Propane Torch (1 Pack) --- ## 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.tn/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1](https://www.desertcart.tn/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-04-22*