Is this good for bonding outdoor granite together that is exposed to sunlight/heat?

Look to the 8265S original for this

Which is stronger, this product or the jar of extreme heat JB weld?

This ,the Extreme is for exhaust manifold repair mostly.

Will this bond ceramic magnets to iron flywheels. Application is jet ski /w/ water cooled flywheel cover. Temps likely under 300 degrees?

Better to use a gray RTV silicone. like is used for engine building. Any brand. Can easily handle the heat and is also a good adhesive.

Is it water resistant?

yes it is water resistant but the surfaces must be dry and clean before application.

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Description

🔥 Fix it fast, fix it fierce — the heat-proof bond you can’t afford to miss!

FAST ACTING FORMULA - Sets in just 1 hour at room temperature and cures fully in 24 hours, or speed cures in 1 hour at 250°F.
INDUSTRIAL GRADE STRENGTH - Delivers a rock-solid 4730 PSI bond that resists chemicals and fuels—built for the toughest fixes.
UNMATCHED HEAT RESISTANCE - Withstands scorching temperatures up to 550°F for repairs that last under pressure.
PRECISION APPLICATION SYRINGE - Easy 1:1 mix ratio in a convenient syringe ensures mess-free, accurate repairs every time.
VERSATILE SURFACE COMPATIBILITY - Bonds seamlessly to metal, plastic, wood, concrete, ceramic, tile, and fiberglass—your all-in-one repair solution.

J-B Weld High Heat Epoxy Syringe is a professional-grade, two-part epoxy designed for high-temperature repairs up to 550°F. It forms a permanent, chemical- and fuel-resistant bond with 4730 PSI tensile strength. The epoxy sets in 1 hour at room temperature and cures fully in 24 hours, with accelerated curing possible at elevated heat. Compatible with a wide range of materials, it comes in a convenient syringe for precise mixing and application.

Specifications

Brand	J-B Weld
Specific Uses For Product	Repair, Tile Repair
Material	Epoxy Resin
Item Form	Liquid
Special Feature	Strong
Colour	Grey
Item Package Quantity	1
Package Information	Syringe
Item Volume	25 Millilitres
Full Cure Time	24 Hours
Tensile Strength	4.73E+3 PSI
Net Quantity	1.0 count
UPC	043425700346 043425501974
Number of Pieces	1
Manufacturer	J-B Weld
Model number	50197
Number of Memory Sticks	1
Item Weight	25 g
Product Dimensions	3.18 x 11.13 x 21.92 cm; 25 g
Item model number	50197
Item Height	8.63 Inches
Item Width	4.38 Inches
Power Source	Hand_powered
Included Components	Epoxy Syringe
Are batteries included?	No

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