(800)865-5931 Monday - Friday 8am - 7pm, Saturday 9am - 3pm Central
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Actual product may vary from photos.
The Virginia KMP PM8 has been discontinued.
Please call us for a suitable alternate product.

(800) 865-5931

Mon-Fri 8am-7pm, Sat 9am-3pm CT

Thermal mastic compound is used to professionally seal duct work, and in any application in which enhanced surface to surface heat transfer would aid in system or component performance such as expansion valve and thermometer sensor bulbs.  Sealing duct work saves money on heating and cooling costs by preventing air leaks.

Also available in 1 gallon and 5 gallon buckets.



  • Stable between -50°F to 220°F (-46°C to 100°C).
  • Increases heat transfer between surfaces 4 times over
    mechanical mounting alone.
  • Replaces solder for heat transmission.
  • Available in 3 convenient sizes.

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.