--- product_id: 46259170 title: "Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz." brand: "refrigeration technologies" price: "RM271" currency: MYR in_stock: true reviews_count: 8 category: "Refrigeration Technologies" url: https://www.desertcart.com.my/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1 store_origin: MY region: Malaysia --- # 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:** RM271 **Availability:** ✅ In Stock ## Summary > 🔥 Stay cool under pressure—heat blocking made effortless! ## 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?** RM271 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/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 - • **Reusable Efficiency:** Use up to 40 times—just re-moisten and go, reducing waste and cost - • **Mess-Free Application:** No sticky residue or cleanup hassles with its clean, water-activated formula - • **Trusted HVAC Essential:** Highly rated by pros for keeping HVAC valves cool and safe during soldering - • **Ultimate Heat Shielding:** Protects valves & sensitive parts from extreme heat during brazing and welding - • **Versatile Torch Compatibility:** Works seamlessly with MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane torches ## Overview The Refrigeration Technologies RT400P Viper Wet Rag Heat Blocking Putty is a 12 oz. reusable, high-viscosity putty designed to protect sensitive surfaces and valves from direct and conductive heat during brazing, soldering, or welding. Compatible with multiple torch types, it offers a no-mess, water-activated formula that can be reused up to 40 times, making it an essential, cost-effective tool for HVAC professionals and welders alike. ## 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: Keeps valves cool while soldering. - Excellent product to keep valves of any kind cool while soldering. Works excellent for HVAC valves. Review: Reusable - I use this all the time on my air conditioning jobs. It keeps everything cooler to prevent anything downstream from heating up. Great because it’s reusable I just peel it off the surface and put it back in the container. ## Features - It is reusable - Protects surfaces, valves - Blocks direct and conductive heat transfer - No mess formula ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B017T23T18 | | Brand | Refrigeration Technologies | | Brand Name | Refrigeration Technologies | | Color | Gray | | Compatible Material | Ceramic, Metal, Plastic | | Container Type | Jar | | Customer Reviews | 4.6 out of 5 stars 642 Reviews | | Global Trade Identification Number | 00017857400082 | | Item Form | Putty | | Item Package Quantity | 1 | | Item Weight | 1.6 ounces | | Manufacturer | Refrigeration Technologies | | Model | RT400P | | Number of Pieces | 1 | | Other Special Features of the Product | Heat Resistant | | Part Number | REFRIGERATION TECHNOLOGOES - RT400P | | Special Feature | Heat Resistant | | Specific Uses For Product | Repair, Welding | | UPC | 696335182315 017857400082 | | Unit Count | 12 Ounce | | Viscosity Level | High | | 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) ## 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 ### ⭐⭐⭐⭐⭐ Keeps valves cool while soldering. *by M***E on August 4, 2026* Excellent product to keep valves of any kind cool while soldering. Works excellent for HVAC valves. ### ⭐⭐⭐⭐⭐ Reusable *by A***R on June 4, 2026* I use this all the time on my air conditioning jobs. It keeps everything cooler to prevent anything downstream from heating up. Great because it’s reusable I just peel it off the surface and put it back in the container. ### ⭐⭐⭐⭐⭐ Sucks away the heat *by N***H on May 23, 2026* It does exactly what it says and helps protect what you don't want getting extremely hot. Ive used similar products, but the fact this is reusable puts this ahead of them ## 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.com.my/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1](https://www.desertcart.com.my/products/46259170-refrigeration-technologies-rt400p-viper-wetrag-heat-blocking-putty-jar-1) --- *Product available on Desertcart Malaysia* *Store origin: MY* *Last updated: 2026-08-25*