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.

Deliver to EGYPT

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

Product ID: 62030877

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Details

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

💧No mess, re-moisten with water

🔥Blocks direct & conductive heat

♻️Reusable up to 40 times

Description

🔥♻️ Stay cool under pressure with the ultimate heat-blocking putty!

HEAT SHIELD MASTERY - Protects valves & sensitive parts from extreme heat damage
NON TOXIC CONFIDENCE - Safe for professional use without harmful chemicals
ECO SMART REUSABILITY - Use up to 40 times with simple re-moistening—cut waste, save money
MESS FREE APPLICATION - No sticky residue or cleanup hassles—just mold, apply, and remove
VERSATILE TORCH COMPATIBILITY - Perfect for MAP/PRO, oxy/acetylene, MIG, TIG, arc, and propane welding

The Refrigeration Technologies RT400P Viper Wet Rag Heat Blocking Putty is a reusable, non-toxic putty designed to protect sensitive surfaces and valves from direct and conductive heat during welding, brazing, or soldering. It offers up to 40 uses with a no-mess formula that can be re-moistened easily, compatible with a wide range of torches, making it an essential tool for professionals seeking reliable heat protection and efficiency.

Specifications

Manufacturer	Refrigeration Technologies
Part number	REFRIGERATION TECHNOLOGOES - RT400P
Item Weight	45.4 g
Product Dimensions	0.25 x 0.25 x 0.25 cm; 45.36 g
Item model number	RT400P
Colour	See Picture
Material	OTHER
Item Package Quantity	1
Number of Pieces	1
Special Features	Non Toxic
Specific uses	Repair, Welding
Batteries included?	No
Batteries Required?	No

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