Low Corrosion Markers

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Thermomelt® - Low Corrosion Temperatures

Thermomelt HEAT-STIK® markers are a quick, low-cost method to accurately measure surface temperatures of various metals and equipment. Available in 20 exact temperatures that are engineered to contain low levels of chlorides, halogens, low melting point metals, and sulfur. The low corrosion formulas are safe for use on stainless steel, alloys and other superalloy metals and will not contribute to unwanted corrosion, degradation, or pitting.

Please note that the color of the Thermomelts are not a part of their function, since the temperature signal consists of melting. Indicator color is subject to change without notice.



    When the stick melts, the precise temperature is reached

    Confirmed using a typical analysis to contain:

    • 200 ppm Chlorides and total halogens
    • 250 ppm each low melting point metals
    • 250 ppm sulfur


    Long-lasting stick is 33% bigger than competition

    Accurate to within +/- 1% of Fahrenheit and +/- 3% Celsius rated temperatures; no need for sensor calibration

    Ideal for: pre-heating, post-weld heat treating, interpass temperature monitoring, stress-relieving and annealing

    Protective holder, shirt-clip and adjustment ring prevents breakage and improves handling

    Meets welding codes: AWS D1.1, ANSI/ASME Code B32.1 & B31.3, ASME Code Sec. I, III, and VII, NIST Traceable

    Made in U.S.A.


    Power generation facilities

    Oil refineries

    Ship building and repair

    Aviation and aerospace


    Stainless steel

    Alloy and super alloy metals



  • Details:

    86436      125ºF (52ºC)
    86463      150ºF (66ºC)
    86481      175ºF (79ºC)
    86517      200ºF (93ºC)
    86544      225ºF (107ºC)
    86562      250ºF (121ºC)
    86589      275ºF (135ºC)

    86625      300ºF (149ºC)
    86661      325ºF (163ºC)
    86697      350ºF (177ºC)
    86715      375ºF (191ºC)
    86733      400ºF (204ºC)
    86751      425ºF (218ºC)

    86769      450ºF (232ºC)
    86787      475ºF (246ºC)
    86805      500ºF (260ºC)
    68623      550ºF (388ºC)
    86859      650ºF (343ºC)

           Click here for Thermomelt® SDS