How long does this last or how many times can it be exposed to high heat?

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.

Does this leave residue or react with metal?

No. Just clean off any residual COMPLETELY>

why is this is 20 dollars on ebay?

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.

Is it conductive? can it be used to shield parts on a pcb while using a heat gun?

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.

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Refrigeration Technologies RT400P Viper WetRag Heat Blocking Putty 350ml Jar

Product ID: 733772926

Details

Brand
Refrigeration
Item Form
Putty
Item Package Quantity
1
Item Volume
12 Fluid
Special Feature
Heat Resistant

🔥350ml heat-blocking capacity

♻️Reusable & mess-free

🛡️Protects sensitive surfaces

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$U5454

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Description

🛠️ Keep your cool while things heat up!

SURFACE SAVIOR - Safeguards valves and delicate components from costly heat damage.
NON TOXIC EASY - Safe to handle with simple prep—just add a few drops of water and mold to fit.
HEAT SHIELD MASTERY - Blocks direct heat transfer during brazing, soldering, or welding with precision.
REUSABLE EFFICIENCY - Use again and again—no waste, no mess, just reliable protection every time.
VERSATILE COMPATIBILITY - Perfect for Map/Pro, oxy/acetylene, MIG, TIG, Arc, and propane torch applications.

The Refrigeration Technologies RT400P Viper WetRag Heat Blocking Putty is a 350ml reusable thermal putty designed to protect plumbing and sensitive components from heat damage during brazing, soldering, or welding. Compatible with multiple torch types, it offers mess-free application, non-toxic safety, and reliable heat blocking to ensure your work stays precise and damage-free.

Specifications

ASIN	B017T23T18
Amazon Bestseller	#264,161 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5,527 in Pipe Fittings
Brand Name	Refrigeration Technologies
Customer Reviews	3.0 3.0 out of 5 stars (1)
Global Trade Identification Number	00017857400082
Item Form	Putty
Item Package Quantity	1
Item Weight	0.1 Pounds
Manufacturer	Refrigeration Technologies
Model	RT400P
Number of Pieces	1
Other Special Features of the Product	Heat Resistant
Part Number	REFRIGERATION TECHNOLOGOES - RT400P
UPC	696335182315 017857400082
Unit Count	12.0 Ounce
Volume	12 Fluid Ounces

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$U5454

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In stock

Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Uruguay.

Secure transaction

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