# TLDR Review: M-D Building Products Foam Weatherstrip

*Published: 2025-02-18 | Updated: 2025-02-18 | Source: https://shopsavvy.com/reviews-tldr/m-d-building-products-foam-weatherstrip*

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## Verdict

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.

**Top pro:** Very foamy and thick material that compresses well to prevent air leaks.
**Top con:** Required significant trimming to fit properly.

## Product: M-D Building Products Foam Weatherstrip

## Pros
- Very foamy and thick material that compresses well to prevent air leaks.
- Excellent adhesion and effectiveness for insulation purposes.
- Perfectly suited for use in an RV air conditioner system and large openings.
- Effective in filling gaps nicely, even in warped door gaps.
- Expands to full size after packaging is opened, sealing gaps efficiently.
- Remains firmly in place after a month of use, unlike other similar products.

## Cons
- Required significant trimming to fit properly.
- Difficult to work with and open, causing frustration.
- Packaging makes it difficult to gauge thickness before application.
- Advised instructions are confusing and not visible until opened.
- Adhesive fails to stick to the foam, causing application issues.
- Foam expands but results in a low density and soft texture.
- Considered expensive, with perceived worth lower than the price.
- Best suited for straight line applications; not effective for corners.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Very foamy and thick material that compresses well to prevent air leaks. | Required significant trimming to fit properly. |
| Excellent adhesion and effectiveness for insulation purposes. | Difficult to work with and open, causing frustration. |
| Perfectly suited for use in an RV air conditioner system and large openings. | Packaging makes it difficult to gauge thickness before application. |
| Effective in filling gaps nicely, even in warped door gaps. | Advised instructions are confusing and not visible until opened. |
| Expands to full size after packaging is opened, sealing gaps efficiently. | Adhesive fails to stick to the foam, causing application issues. |
| Remains firmly in place after a month of use, unlike other similar products. | Foam expands but results in a low density and soft texture. |
|  | Considered expensive, with perceived worth lower than the price. |
|  | Best suited for straight line applications; not effective for corners. |

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