---
product_id: 273707167
title: "RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz."
brand: "refrigeration technologies"
price: "¥12775"
currency: JPY
in_stock: true
category: "Refrigeration Technologies"
url: https://www.desertcart.jp/products/273707167-rt400p-viper-wetrag-heat-blocking-putty-jar-1-12-oz
store_origin: JP
region: Japan
---

# No mess, re-moistenable formula Blocks direct & conductive heat Reusable up to 40 times RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz.

**Brand:** refrigeration technologies
**Price:** ¥12775
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cool under pressure with Viper Heat Blocking Putty ♻️

## Quick Answers

- **What is this?** RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz. by refrigeration technologies
- **How much does it cost?** ¥12775 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/273707167-rt400p-viper-wetrag-heat-blocking-putty-jar-1-12-oz)

## 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:** 12 oz jar fits easily in your toolkit, ready to deploy whenever heat protection is critical.
- • **Reusable Efficiency:** Use up to 40 times—just re-moisten and keep your workflow smooth and sustainable.
- • **Ultimate Heat Shield:** Protects sensitive surfaces and valves from extreme heat damage during brazing and welding.
- • **Mess-Free Application:** No sticky residue or cleanup hassles with the innovative no mess formula.
- • **Versatile Torch Compatibility:** Perfect for MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane torches—one putty to rule them all.

## Overview

The RT400P Viper Wetrag Heat Blocking Putty is a reusable, no-mess thermal barrier designed to protect piping, valves, and sensitive components from direct and conductive heat during brazing, soldering, or welding. Compatible with multiple torch types and effective for up to 40 uses, it offers professional-grade heat protection in a compact 12 oz jar.

## 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.

## Features

- It is reusable
- Protects surfaces, valves
- Blocks direct and conductive heat transfer
- No mess formula

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B017T23T18 |
| Best Sellers Rank | #36,230 in Automotive ( See Top 100 in Automotive ) #343 in Automotive Cleaners |
| Item model number | RT400P |
| Manufacturer | Refrigeration Technologies |
| Product Dimensions | 0.25 x 0.25 x 0.25 cm; 45.36 g |

## Product Details

- **Brand:** Refrigeration Technologies
- **Item form:** Putty
- **Material:** OTHER
- **Special features:** Non Toxic
- **Specific uses for product:** Repair, Welding

## Images

![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.

## Frequently Bought Together

- Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz.
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**Shop now:** [https://www.desertcart.jp/products/273707167-rt400p-viper-wetrag-heat-blocking-putty-jar-1-12-oz](https://www.desertcart.jp/products/273707167-rt400p-viper-wetrag-heat-blocking-putty-jar-1-12-oz)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-16*