38x50x7 Single Lip Viton Rubber Rotary Shaft Seal

38x50x7 Single Lip Viton Rubber Rotary Shaft Seal

Marsoni

M251S

$16.00

Get it in 3 business days with 1 day shipping. Friday, May 29

38x50x7 Single Lip Viton Rubber Rotary Shaft SealAcrylonitrile butadiene rubber (NBR) is the material name for nitrile rubber. This material is very good for seals due to its make up. Nitrile rubber can tolerate short term dry running of the sealing lip. The operating temperature range without failure of nitrile rubber is 40 to +100 C. This also offers a special nitrile rubber compound with a temperature range between 55 and +110 C. Please click here for a full in depth look at the range of seals

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We offer a 30-day return/exchange service after receiving.
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I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid. This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush. Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it. If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)

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Reviewed in the United States on November 11, 2025

Verified Purchase

Mike S.

Draper, US

★★★★★ 5

Excellent Car Sound Deadening and Heat Insulation Solution

Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt

If you're looking for a high-quality car sound deadening and heat insulation material, then the Siless Liner 157 (4 mm) mil 36 sqft is definitely worth considering. This product is designed to offer superior noise reduction and heat insulation for your car, making your driving experience more comfortable and enjoyable. The closed-cell foam material used in this product is of premium quality, and it effectively blocks out external noise and vibrations. This means you can enjoy a quieter and more peaceful ride, even on noisy roads. In addition, the Siless Liner 157 also provides excellent heat insulation, which can help keep your car cooler in hot weather. One of the best things about this product is that it's very easy to install. You don't need any special tools or equipment, and the material can be easily cut to fit any shape or size. It's also very lightweight and flexible, which makes it easy to work with. Overall, the Siless Liner 157 (4 mm) mil 36 sqft Car Sound Deadening Closed Cell Foam & Heat Insulation mat is an excellent choice for anyone looking to improve the comfort and performance of their car. It's a high-quality product that delivers on its promises, and it's definitely worth the investment.

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Reviewed in the United States on March 12, 2023

Verified Purchase

Marie Phillips

San Leandro, US

★★★★★ 4

Heavy-Duty That Works!

Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt

This extreme sound deadening mat performs well for reducing road noise and vibration. It feels dense and adheres securely when properly applied. Once installed, it noticeably improves interior quietness. Overall, it’s a strong choice for more serious sound insulation projects.

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Reviewed in the United States on May 12, 2026

Verified Purchase

J Whitehead

Phoenix, US

★★★★★ 5

Good product, quite sticky I must say.

Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt

Worked for my van insulation

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Reviewed in the United States on June 1, 2026