---
product_id: 222480407
title: "MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912"
brand: "j-b weld"
price: "$30.17"
currency: USD
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.us/products/222480407-mufflerseal-muffler-cement-plastic-tube-12-oz-model-number-37912
store_origin: US
region: United States of America
---

# 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:** $30.17
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with J-B Weld MufflerSeal — your exhaust’s ultimate armor!

## Quick Answers

- **What is this?** MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912 by j-b weld
- **How much does it cost?** $30.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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 bond on mufflers, pipes, and exhaust joints.
- • **Heatproof Hero:** Withstands extreme exhaust temps up to 700°F, keeping your ride cool under pressure.
- • **Dual Cure Flexibility:** Cures naturally in 24 hours or accelerates with heat—perfect for any work pace or environment.
- • **Pro-Grade Reliability:** Trusted by fleet and plant maintenance pros, backed by a 1-year manufacturer warranty.
- • **Versatile Compatibility:** Seals metal, plastic, and rubber components seamlessly—one tube for all your exhaust fixes.

## Overview

J-B Weld MufflerSeal is a 12 oz. iron-reinforced paste designed to seal mufflers, pipe joints, and exhaust systems. It resists temperatures up to 700°F and cures fully in 24 hours or faster with heat. Compatible with metal, plastic, and rubber, this high-viscosity paste offers professional-grade durability trusted in fleet and plant maintenance.

## Description

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

Review: Muffler band aid - Had cracks along muffler seam and both mufflers were loud, this has them back to normal operation. Saved me hundreds!!
Review: Tough little helper - This stuff saved my tired commute home. Night shift nurse here and my muffler started making this rattly sound on the 4 a.m. drive, which is the last thing I need after twelve hours on my feet. I spotted a tiny crack and used this cement to patch it. It goes on easy with a small putty knife. I just smoothed it over, waited about 3–4 hours, then let the car idle in the driveway for 20 minutes. It turned rock hard and the noise disappeared. First quiet drive to work in a week and it honestly made me weirdly happy 😊. Curious how long it will last but for now it works well.

## 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 | #2,726 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Joint Sealants |
| Brand | J-B Weld |
| Brand Name | J-B Weld |
| Color | Dark Gray |
| Compatible Material | Metal, Plastic, Rubber |
| Container Type | Can, Tube |
| Customer Reviews | 4.4 out of 5 stars 1,752 Reviews |
| Full Cure Time | 24 hours |
| Included Components | Muffler Cement |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Muffler Sealer |
| Item Weight | 12 ounces |
| Manufacturer | J-B Weld |
| Material | Iron Reinforced Paste |
| Material Type | Iron Reinforced Paste |
| Model | 37906 |
| Number of Pieces | 1 |
| Part Number | 37912 |
| Specific Uses For Product | Fleet and plant maintenance. |
| UPC | 043425379122 |
| Unit Count | 12 Ounce |
| Viscosity Level | High |
| Volume | 354.88 ml |
| Warranty Description | 1 year manufacturer |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** J-B Weld
- **Item Form:** Paste
- **Material:** Iron Reinforced Paste
- **Special Feature:** Iron reinforced paste for high-temperature sealing
- **Specific Uses For Product:** Fleet and plant maintenance.

## Images

![MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912 - Image 1](https://m.media-amazon.com/images/I/61YGmR+28FL.jpg)
![MufflerSeal Muffler Cement Plastic Tube 12 oz., Model Number: 37912 - Image 2](https://m.media-amazon.com/images/I/61+ZqoegkbL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Muffler band aid
*by E***C on September 12, 2026*

Had cracks along muffler seam and both mufflers were loud, this has them back to normal operation. Saved me hundreds!!

### ⭐⭐⭐⭐⭐ Tough little helper
*by G***E on September 23, 2026*

This stuff saved my tired commute home. Night shift nurse here and my muffler started making this rattly sound on the 4 a.m. drive, which is the last thing I need after twelve hours on my feet. I spotted a tiny crack and used this cement to patch it. It goes on easy with a small putty knife. I just smoothed it over, waited about 3–4 hours, then let the car idle in the driveway for 20 minutes. It turned rock hard and the noise disappeared. First quiet drive to work in a week and it honestly made me weirdly happy 😊. Curious how long it will last but for now it works well.

### ⭐⭐⭐⭐⭐ This muffler cement actually stayed put on my old Honda
*by C***1 on October 2, 2026*

Took a chance on this after another brand flaked off my rusty Civic muffler. I drive home after night shifts, roads are empty and quiet, so that rattling exhaust was driving me nuts. I crawled under the car, cleaned the area as best I could, squeezed this on like thick toothpaste, then let it dry before my next shift. It cured nice and hard. The next morning my drive home was so much quieter, which honestly made me glad I tried this instead of booking a repair right away. Tube is big enough for a couple more fixes too. Handy to keep in the trunk for an older car like mine 🚗😴

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-10-18*