Is this recommended for gas fittings on my Blackstone Griddle?

I would use this on propane gas connections

What’s the difference between application temp and performance temp? I’d need to use this for locking bolts that get up to 210 Fahrenheit.

Yes that would be appropriate. It seals items that will get into the higher range of temps

when reapplying the same sealant, is it necessary to first clean off the sealant from last time?

I would clean off the sealant before applying new just because the old sealant may have become contaminated. If it has some grit in it, it could affect the seal. Maybe overkill, but I don't like to second guess seals on propane lines.

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Description

Seal the Deal! 🔒

EASY BREAKOUT - No galling or damage to threads.
INDUSTRY STANDARD - Trusted by professionals for decades.
LOW FRICTION FORMULA - Achieve tighter joints with less torque.
VERSATILE APPLICATIONS - Ideal for a variety of uses.
IMMEDIATE PRESSURIZATION - Perfect for urgent service needs.

The 25790 1-3/4-Ounce Tube No.5 Pipe Thread Sealant by Rectorseal is a soft-setting, slow-drying sealant that has become the industry standard. Manufactured in the USA, it features a low coefficient of friction for tighter joints and easy breakout without damaging threads, making it perfect for immediate pressurization and a variety of applications.

Specifications

Material	Plastic
Brand	Rectorseal
Style	Compact
Item Weight	1.6 Ounces
Item dimensions L x W x H	1.7 x 1.7 x 5.5 inches
Water Resistance Level	Water Resistant
Item Form	Cream
UPC	021449257909
Unit Count	1.76 Ounce
Global Trade Identification Number	00021449257909
Number of Items	1
Color	Yellow
Surface Recommendation	Steel
Manufacturer	The Rectorseal Corporation
Part Number	25790
Item Weight	1.6 ounces
Product Dimensions	1.7 x 1.7 x 5.5 inches
Item model number	25790
Is Discontinued By Manufacturer	No
Size	1.75 Oz
Item Package Quantity	1
Special Features	Waterproof
Included Components	Unit^Instruction Guide
Batteries Included?	No
Batteries Required?	No
Warranty Description	Warranty

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