Pros

  • โ€ขVery foamy and thick material that compresses well to prevent air leaks.
  • โ€ขExcellent adhesion and effectiveness for insulation purposes.
  • โ€ขPerfectly suited for use in an RV air conditioner system and large openings.
  • โ€ขEffective in filling gaps nicely, even in warped door gaps.
  • โ€ขExpands to full size after packaging is opened, sealing gaps efficiently.
  • โ€ขRemains firmly in place after a month of use, unlike other similar products.

Cons

  • โ€ขRequired significant trimming to fit properly.
  • โ€ขDifficult to work with and open, causing frustration.
  • โ€ขPackaging makes it difficult to gauge thickness before application.
  • โ€ขAdvised instructions are confusing and not visible until opened.
  • โ€ขAdhesive fails to stick to the foam, causing application issues.
  • โ€ขFoam expands but results in a low density and soft texture.
  • โ€ขConsidered expensive, with perceived worth lower than the price.
  • โ€ขBest suited for straight line applications; not effective for corners.

Bottom Line

The M-D Building Products 52052 1 in. x 13 ft. Black Expandable Foam Weatherstrip is a robust choice for anyone looking to seal gaps and improve insulation, particularly in specific applications like RV air conditioning systems. While it offers excellent adhesion and expands as advertised, it requires some trimming and strategic handling to achieve optimal results. However, potential buyers should note the challenges with the adhesive and application procedure, alongside its premium price point relative to its perceived value.

Lowest at any Popular Retailer
$16.79 at Amazon

Where to Buy

Prices last updated: August 1st 2025 6:59 pm
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