# TLDR Review: BlueDevil Rear Main Sealer

*Published: 2025-03-18 | Updated: 2025-03-18 | Source: https://shopsavvy.com/reviews-tldr/bluedevil-rear-main-sealer*

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## Product: BlueDevil Rear Main Sealer
**Brand:** BlueDevil Products

## Pros
- Effectively stopped an oil leak in various vehicles, including a 2014 Chevy Cruze and a 2004 Saturn Vue.
- Eliminated squealing noises related to the oil seal.
- Saved users over $800 in repair costs by preventing the need for seal replacement.
- Resulted in a dry engine after two weeks, indicating long-lasting effects.
- Easy to use without the need to drain existing oil, making it convenient.
- Specifically formulated to rejuvenate seals and address leaks at the source.
- Highly recommended by experienced automotive professionals.
- Proven effective in a wide range of vehicles, including classic cars and sports cars.
- Achieved long-lasting results with no leaks after 50,000 miles in some cases.

## Cons
- Some users reported engine issues, such as oil pressure drops and warning lights.
- Similar results reportedly achievable with less expensive alternatives like brake fluid due to similar ingredients.
- Effectiveness may vary, with some reviews indicating it works only about 50% of the time.

## Bottom Line

BlueDevil Rear Main Sealer is highly praised for its effectiveness in stopping leaks and saving on costly repairs. It's especially recommended for car enthusiasts and professionals who deal with classic or high-performance vehicles. However, potential users should be aware of possible engine issues and that results may vary, as indicated by mixed experiences.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Effectively stopped an oil leak in various vehicles, including a 2014 Chevy Cruze and a 2004 Saturn Vue. | Some users reported engine issues, such as oil pressure drops and warning lights. |
| Eliminated squealing noises related to the oil seal. | Similar results reportedly achievable with less expensive alternatives like brake fluid due to similar ingredients. |
| Saved users over $800 in repair costs by preventing the need for seal replacement. | Effectiveness may vary, with some reviews indicating it works only about 50% of the time. |
| Resulted in a dry engine after two weeks, indicating long-lasting effects. |  |
| Easy to use without the need to drain existing oil, making it convenient. |  |
| Specifically formulated to rejuvenate seals and address leaks at the source. |  |
| Highly recommended by experienced automotive professionals. |  |
| Proven effective in a wide range of vehicles, including classic cars and sports cars. |  |
| Achieved long-lasting results with no leaks after 50,000 miles in some cases. |  |

## Current Prices

| Retailer | Price | Availability |
|----------|-------|-------------|
| Auto Barn | $13.95  | Check |
| Penwago Co. | $14.97  | Check |
| Amazon | $15.86  | Check |
| Instacart | $15.97  | Check |
| Walmart | $15.97  | Check |
| AUTOZONE | $15.99  | Check |
| NAPA Auto Parts | $15.99  | Check |
| NAPA Auto Parts | $15.99  | Check |
| Advance Auto Parts | $16.99  | Check |
| MechanicSurplus.com | $16.99  | Check |
| Carkart.com | $18.82  | Check |
| Terrashopia | $23.09  | Check |
| AutoMegaStore | $69.99  | Check |

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*About this review: We pulled together findings from professional and user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.*