(800)865-5931 Monday to Friday 8:00 AM - 5:00 PM Central
Free Shipping See Details
No Sales Tax See Details
Actual product may vary from photos.
The Virginia KMP PM25 has been discontinued.
Please call us for a suitable alternate product.

(800) 865-5931

Monday - Friday

8:30 AM - 5:00 PM Central

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 a 7.5oz tube and 1 gallon bucket.



  • 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.