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: 273707167

Details

Brand
Refrigeration
Item form
Putty
Material
OTHER
Special features
Non Toxic
Specific uses for product
Repair Welding

💧No mess, water-activated formula

🔥Blocks direct & conductive heat

♻️Reusable up to 40 times

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B/.163

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Mold. Protect. Repeat. Your ultimate heat-blocking sidekick ♻️

NON TOXIC SAFE - Engineered for professional use with a non-toxic, water-resistant composition.
HEAT SHIELD MASTERY - Protects sensitive surfaces and valves from extreme heat damage during welding or brazing.
MESS FREE APPLICATION - No sticky residue or cleanup hassles thanks to its clean, no-mess formula.
EFFORTLESS REUSABILITY - Simply re-moisten and reuse up to 40 times—sustainable and cost-effective for pros.
UNIVERSAL TORCH COMPATIBILITY - Works seamlessly with MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane torches.

The RT400P Viper Wetrag Heat Blocking Putty is a high-viscosity, reusable putty designed to shield piping and sensitive components from direct and conductive heat during welding, brazing, or soldering. Compatible with multiple torch types, it offers up to 40 uses with a no-mess, water-activated formula that’s non-toxic and water-resistant, making it an essential tool for professionals seeking reliable heat protection and efficiency.

Specifications

ASIN	B017T23T18
Best Sellers Rank	#48,272 in Automotive ( See Top 100 in Automotive ) #480 in Automotive Cleaners
Brand Name	Refrigeration Technologies
Color	Gray
Compatible Material	Metal
Container Type	Jar
Global Trade Identification Number	00017857400082
Item Form	Putty
Item Package Quantity	1
Item Weight	0.1 Pounds
Manufacturer	Refrigeration Technologies
Material Type	OTHER
Model	RT400P
Number of Pieces	1
Other Special Features of the Product	Non Toxic
Part Number	REFRIGERATION TECHNOLOGOES - RT400P
Specific Uses For Product	Repair, Welding
UPC	696335182315 017857400082
Viscosity	High Viscosity
Viscosity Level	High
Volume	12 Fluid Ounces
Water Resistance Level	Water Resistant

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