Many everyday glues we read are rated somewhere between 150 and 220°F. For more, makers sell high-heat silicones and epoxies rated 350 to 550°F, and J-B Weld’s ExtremeHeat to 1000°F. Each figure is that product’s own.
Service temperature, hottest first
Each product’s rated temperature, from its maker
Product
Type
Rated to
J-B Weld ExtremeHeat
Water-based, non-flammable
1000°F
J-B Weld HighHeat (syringe)
Epoxy
550°F
J-B Weld Original (twin tube)
Epoxy
550°F
J-B Weld HighHeat putty
Epoxy putty
450°F continuous, 500°F intermittent
Permatex Clear RTV Silicone
Silicone
-75 to 400°F
Loctite Clear Silicone
Silicone
-76 to 350°F
J-B Weld SteelStik
Epoxy putty
350°F
Gorilla Epoxy Ultimate
Epoxy
-40 to 300°F
Liquid Nails Perfect Glue
Moisture-curing polymer
-60 to 300°F
Liquid Nails Fuze*It Max
Construction adhesive
-40 to 300°F
Loctite Epoxy Putty
Epoxy putty
-17 to 250°F for fills; not over 158°F for load-bearing bonds
From each product’s data sheet or page. J-B Weld’s FAQ gives 300°F for the Original syringe and 650°F in its table for HighHeat putty, against 450 to 500°F on the putty’s own page.
Reading the figures
Long term vs short term: Loctite rates its Quick Set, Marine and 1 Minute epoxies to 120°F long term but 302°F short term. We’d plan on the long-term figure.
Fill vs bond: Loctite’s Epoxy Putty goes to 250°F as a fill, but its data sheet says not over 158°F for a bond that carries load.
Not a rating: 3M’s spray adhesive sheets give a shear adhesion failure temperature, a lab test. Gorilla’s hot glue safety data sheet gives a 190°F softening point. Neither is a service temperature.
Engines: Permatex says its Clear RTV is not recommended for engine gaskets despite the 400°F rating.
J-B Weld’s HighHeat syringe also lists a cure of 1 hour at 250°F. ExtremeHeat sets in 1 hour and cures in 24, by its page.
Of the products we read, J-B Weld ExtremeHeat at 1000°F, then the J-B Weld HighHeat syringe and Original twin tube at 550°F, HighHeat putty at 450°F continuous (500°F intermittent), and Permatex Clear RTV silicone at 400°F.
Is super glue heat resistant?
To a point: Gorilla rates its Super Glue Gel -65 to 220°F, and Titebond its Instant Bond -65 to 200°F.
What glue for a stove or oven?
Check that the product lists your use and temperature. J-B Weld ExtremeHeat is rated to 1000°F and the HighHeat syringe to 550°F, but J-B Weld's FAQ says its products are not rated food-safe. We wouldn't use a glue on any part that touches food or flame without its maker saying so.
Every figure is the product’s own service temperature from its maker’s data sheet or page; where a maker gives two figures, we show both. Checked against published data from Henkel, Gorilla Glue Company, J-B Weld, 3M and Pittsburgh Paints Company (plus 4 more).
See all 29 sources
Gorilla Glue Company, Gorilla Super Glue Gel: product page, FAQ and SDS (2025)
Gorilla Glue Company, Original Gorilla Glue: product page, FAQ and SDS (2024)