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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RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz.

Product ID: 46259170

Details

Brand
Refrigeration
Color
Gray
Item Form
Putty
Special Feature
Heat Resistant
Specific Uses For Product
Repair Welding

💧No mess, water-activated formula

🔥Blocks direct & conductive heat

♻️Reusable up to 40 times

$65.97

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay cool under pressure—block heat like a pro!

REUSABLE EFFICIENCY - Use up to 40 times—just re-moisten and go, saving you time and money on replacements.
MESS FREE APPLICATION - No sticky residue or cleanup hassles with a clean, water-activated putty formula.
TRUSTED HVAC ESSENTIAL - Highly rated by pros for keeping valves cool and safe, making it a must-have for any repair or welding job.
ULTIMATE HEAT SHIELDING - Protect sensitive valves and surfaces from extreme heat damage during brazing or welding.
VERSATILE TORCH COMPATIBILITY - Works seamlessly with MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane torches.

The Refrigeration Technologies RT400P Viper Wet Rag Heat Blocking Putty is a 12 oz. reusable, high-viscosity putty designed to protect valves and sensitive components 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 efficient and essential tool for HVAC professionals and welders alike.

Specifications

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 663 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 Packs	1
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

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

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