Sill Sealer



About the Product:

The Reflectix® Sill Sealer is a closed-cell product, designed to reduce air leakage between the foundation wall and the sill plate. Additionally, it can be used to seal around window and door frames. The product is applicable for residential and commercial construction, slab on grade, and in crawl spaces or basements.


  • The product consists of a ribbed polyethylene closed-cell foam (total thickness 3/16”).
  • Four widths are available, 3.5”, 5.5”, 7.5” and 9.5” by a linear footage of 50’.
  • Refer to the Sill Seal webpage for additional information.



  • Sill Seal

Product Codes/Sizes:


  • CF30550 (3.5“x 50’)
  • CF50550 (5.5“x 50’)
  • CF70550 (7.5“x 50’)
  • CF90550 (9.5“x 50’)


Click here to link to our product literature library for additional information.