---
product_id: 222480407
title: "MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912"
brand: "j-b weld"
price: "€ 32.48"
currency: EUR
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.sk/products/222480407-mufflerseal-muffler-cement-plastic-tube-12-oz-model-number-37912
store_origin: SK
region: Slovakia
---

# Full cure in 24 hours Resists up to 700°F Iron reinforced paste MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912

**Brand:** j-b weld
**Price:** € 32.48
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal before your muffler gives out!

## Quick Answers

- **What is this?** MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912 by j-b weld
- **How much does it cost?** € 32.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/222480407-mufflerseal-muffler-cement-plastic-tube-12-oz-model-number-37912)

## Best For

- j-b weld enthusiasts

## Why This Product

- Trusted j-b weld brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ironclad Seal:** Iron-reinforced formula ensures a durable, long-lasting fix on mufflers and pipe joints.
- • **Heatproof Hero:** Withstands scorching exhaust temps up to 700°F, keeping your ride cool under pressure.
- • **Winter Warrior:** Built tough to resist harsh road salts, moisture, and frost—ideal for cold climates.
- • **Cost-Saving Fix:** Avoid expensive replacements—seal leaks and cracks with a pro-grade paste that lasts.
- • **Flexible Cure Options:** Choose slow cure for precision or speed it up with heat—perfect for any garage setup.

## Overview

J-B Weld MufflerSeal is a high-viscosity, iron-reinforced paste designed to seal mufflers, pipe joints, and exhaust systems. It withstands temperatures up to 700°F and cures fully in 24 hours or faster with heat application. Ideal for professional-grade repairs that resist harsh weather and road conditions, this 12 oz. tube offers a durable, cost-effective solution to extend the life of your exhaust components.

## Description

J-B Weld MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912

Review: Before paying big bucks for a new muffler a little of this may be all that you need! - This stuff worked great! If you have the luxury of a little extra time or a heated garage or heat gun I’d take advantage of it because it does take more time than one might think for it to cure. I pretty much used a whole tube (smaller size order option) but I also laid it on thick around the collar area where the muffler meets the exhaust. I live in the northeast so it’s been cold and I wanted the extra strength for the long winter complete with caustic road salts, moisture and frost heaves. It was a great fix to get me over the hump until spring! J-B Weld is a great company with great products!
Review: Used on 3in 94 k1500 exhaust, worked great. 350sbc - Worked great for my application however, it cracks on moving joints. Still sealed my exhaust very nicely.

## Features

- J-B Weld Muffler Seal: MufflerSeal is an iron reinforced paste designed to seal mufflers, pipe joints and exhaust systems. MufflerSeal can resists up to 700 F.
- Cure Process: MufflerSeal can cure in two ways: By allowing the product to fully harden after it has been applied which can take up to 24 hours (time may vary based on cold or humid work environments) or MufflerSeal can be cured through heat application. You will be able to tell when the product is cured once it is hard.
- Projects: Mufflers, Pipe Joints and Exhaust Systems.
- Package Weight: 12.5 ounces

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084T8BW18 |
| Best Sellers Rank | #3,786 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Industrial Joint Sealants |
| Brand | J-B Weld |
| Color | Dark Gray |
| Date First Available | February 14, 2020 |
| Department | unisex-adult |
| Full Cure Time | 24 Hours |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Volume | 354.88 Milliliters |
| Item Weight | 12 ounces |
| Item model number | 37912 |
| Manufacturer | J-B Weld |
| Material | Iron Reinforced Paste |
| Package Information | Can, Tube |
| Product Dimensions | 7.5 x 5.88 x 5.5 inches |
| UPC | 043425379122 |
| Unit Count | 12.0 Ounce |
| Viscosity | High Viscosity Paste |
| Viscosity Level | High |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** J-B Weld
- **Color:** Dark Gray
- **Item Form:** Paste
- **Item Package Quantity:** 1
- **Material:** Iron Reinforced Paste

## Images

![MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912 - Image 1](https://m.media-amazon.com/images/I/61YGmR+28FL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Before paying big bucks for a new muffler a little of this may be all that you need!
*by M***C on December 17, 2025*

This stuff worked great! If you have the luxury of a little extra time or a heated garage or heat gun I’d take advantage of it because it does take more time than one might think for it to cure. I pretty much used a whole tube (smaller size order option) but I also laid it on thick around the collar area where the muffler meets the exhaust. I live in the northeast so it’s been cold and I wanted the extra strength for the long winter complete with caustic road salts, moisture and frost heaves. It was a great fix to get me over the hump until spring! J-B Weld is a great company with great products!

### ⭐⭐⭐⭐⭐ Used on 3in 94 k1500 exhaust, worked great. 350sbc
*by D***N on July 19, 2025*

Worked great for my application however, it cracks on moving joints. Still sealed my exhaust very nicely.

### ⭐⭐⭐⭐⭐ Works great for muffler repairs
*by C***N on September 4, 2025*

Used this J-B Weld MufflerSeal to fix a small leak in my car’s muffler, and it worked really well. The cement is thick and easy to apply, and it sets up quickly. Once it cured, the leak was completely sealed and it’s holding up perfectly even under heat and vibration. Definitely a good, affordable solution if you need a quick muffler repair without replacing the whole part.

## Frequently Bought Together

- J-B Weld MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912
- J-B Weld ExhaustWeld 2" x 72" Repair Wrap, White
- J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-02*