---
product_id: 23225656
title: "ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g (Pack of 5)"
brand: "acdelco"
price: "₩12108"
currency: KRW
in_stock: true
reviews_count: 13
category: "Ac Delco"
url: https://www.desertcart.kr/products/23225656-acdelco-gm-original-equipment-10-108-12378255-cooling-system-sealing
store_origin: KR
region: South Korea
---

# Multi-engine component compatibility Quick curing on exposure to air High-viscosity sealant ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g (Pack of 5)

**Brand:** acdelco
**Price:** ₩12108
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal the deal with confidence—engineered to keep your ride leak-proof and running smooth!

## Quick Answers

- **What is this?** ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g (Pack of 5) by acdelco
- **How much does it cost?** ₩12108 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/23225656-acdelco-gm-original-equipment-10-108-12378255-cooling-system-sealing)

## Best For

- acdelco enthusiasts

## Why This Product

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

## Key Features

- • **Fast-Track Fix:** Cures at room temperature for immediate oil or coolant fill—no downtime.
- • **Sensor-Safe Formula:** Oxygen sensor safe, ensuring no interference with modern engine diagnostics.
- • **Trusted by Pros & DIYers:** Top-rated with 4.6 stars and proven success stories from real-world high-mileage engines.
- • **Durability Meets Resistance:** Blow-out resistant and metal-safe, engineered to withstand harsh engine oils & coolants.
- • **Precision Engine Protection:** Seals oil pans, manifolds, cam covers & more with OEM-grade reliability.

## Overview

ACDelco GM Original Equipment Cooling System Sealing Tabs deliver a high-viscosity, one-component RTV sealant designed for versatile engine applications. This quick-curing, blow-out resistant formula bonds securely to multiple engine parts, resists oils and coolants, and is oxygen sensor safe. Trusted by professionals and DIY enthusiasts alike, it offers a cost-effective, reliable solution to common engine leaks, extending engine life and performance.

## Description

RTV Engine Sealant is a one-component, room-temperature vulcanizing (RTV) sealant. It is a high viscosity engine sealant that cures when exposed to air. The cured material has adhesion and elongation properties and is effective even on large gaps. It is very resistant to engine oils and coolants, will not corrode metals, and is blow-out resistant. This engine sealant is also oxygen sensor safe. This product comes in a tube for easy, pinpoint application.

Review: Great product. Highly recommend - I have a 2013 Prius, 3rd generation . 210,000 miles. It had been running perfect, when it developed very rough engine noise and severe shaking from time to time when starting. Once underway the car ran normal. A couple of well reviewed mechanics were unable to figure out the cause of the problem. One even said the engine had something lose inside and wasn't worth fixing and should be sold for junk. That made no sense to me. Said he would give me $500 for the car as a trade on one of the used cars he had for sale. The other mechanic said he was certain the head gasket was not leaking (I suspected it was the problem until I got that advice) The check engine light came on and the code said the problem was with the #2 cylinder. I decided to use the internet to find an answer. Turns out this generation of Prius often suffers from the head gasket leaking a bit of water often into the number 2 cylinder. It's a somewhat common problem at around 200,000 miles. Number of options. 1, replace engine with a new or rebuilt or use a low mileage engine from Japan. 2. replace the head gasket. Costly options on an older car with lots of miles. fortunately, I came across a retired mechanic who was aware of the problem and suggested as a first and least costly option, I buy and use this AC Delco product to try and stop the leak. Said he used it on his own car with good luck. Said he was into the second year after using it once and no leaks. I bought it and put into the engine per the instructions. It has now been over 1000 miles since I used the product, only one application, and NO PROBLEMS!!! Talk about a cheap and effective fix. Plus it pin points the cause of the problem. So much for considering top mechanics as the last and best word on my problem. Two lessons learned. 1. This a great product so far. If problem shows up again I will just repeat the fix and take from there. Could not ask for more. 2. The internet is wonderful tool to use to help solve a problem, if only you will take the time and effort to use it fully.
Review: It works 90% of the time 60% of the time for me - Worked for me within a 20 minute drive, I have a turbo LS truck and put in a new radiator and water pump and hoses and had a small but annoying leak I could not find for anything! these things arent magic in a bottle but its a really cheap way to try the easy way out and if not then oh well you are out a couple minutes and couple dollars and keep going forward….

## Features

- Engineered for use on a variety of engine components - effective on: oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
- Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
- High viscosity product that cures when exposed to air

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0026JK8C8 |
| Best Sellers Rank | #5,207 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Engine Cooler Accessories |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,159) |
| Date First Available | April 14, 2009 |
| Exterior | Machined |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 1.12 ounces |
| Item model number | 10-108 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 10-108 |
| Model | AC Delco |
| OEM Part Number | 12378255 |

## Product Details

- **Auto Part Position:** Front
- **Brand:** ACDelco
- **Color:** Beige
- **Material:** Aluminum
- **UPC:** 036666919363

## Images

![ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g (Pack of 5) - Image 1](https://m.media-amazon.com/images/I/71I6zhJ7UxL.jpg)

## Questions & Answers

**Q: The description states "ACDelco 10-108 COOL SEAL5TABS 24CTN"  Please clarify if this is a CARTON of 24 blister packs or only 1 blister pack w/ 5 tabs**
A: 1 blister pack with 5 tabs

**Q: Will these work with the orange Dexcool antifreeze?**
A: My mechanic said not to put anything into the anti-freeze. I will never use that orange stuff in my 1994 Cadillac 4.9 Deville. If you have the 4.6 North Star, that may be different story. GM tried to promote these tablets to cure a bad leaky North-Star motor. Jeff.

**Q: Is this product preventative ?**
A: Yes, this was actually put into aluminum block engines from the factory because of the  porosity. It does an incredible job stopping leaks and preventing leaks.

**Q: what is a ladder frame?**
A: A ladder frame uses an additional block structure located between the cylinder block and oil pan, which incorporates the main bearing caps into a one piece component resembling a ladder, sometimes called a girdle.Feb 6, 2018

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product. Highly recommend
*by R***R on August 3, 2025*

I have a 2013 Prius, 3rd generation . 210,000 miles. It had been running perfect, when it developed very rough engine noise and severe shaking from time to time when starting. Once underway the car ran normal. A couple of well reviewed mechanics were unable to figure out the cause of the problem. One even said the engine had something lose inside and wasn't worth fixing and should be sold for junk. That made no sense to me. Said he would give me $500 for the car as a trade on one of the used cars he had for sale. The other mechanic said he was certain the head gasket was not leaking (I suspected it was the problem until I got that advice) The check engine light came on and the code said the problem was with the #2 cylinder. I decided to use the internet to find an answer. Turns out this generation of Prius often suffers from the head gasket leaking a bit of water often into the number 2 cylinder. It's a somewhat common problem at around 200,000 miles. Number of options. 1, replace engine with a new or rebuilt or use a low mileage engine from Japan. 2. replace the head gasket. Costly options on an older car with lots of miles. fortunately, I came across a retired mechanic who was aware of the problem and suggested as a first and least costly option, I buy and use this AC Delco product to try and stop the leak. Said he used it on his own car with good luck. Said he was into the second year after using it once and no leaks. I bought it and put into the engine per the instructions. It has now been over 1000 miles since I used the product, only one application, and NO PROBLEMS!!! Talk about a cheap and effective fix. Plus it pin points the cause of the problem. So much for considering top mechanics as the last and best word on my problem. Two lessons learned. 1. This a great product so far. If problem shows up again I will just repeat the fix and take from there. Could not ask for more. 2. The internet is wonderful tool to use to help solve a problem, if only you will take the time and effort to use it fully.

### ⭐⭐⭐⭐⭐ It works 90% of the time 60% of the time for me
*by C***B on December 17, 2025*

Worked for me within a 20 minute drive, I have a turbo LS truck and put in a new radiator and water pump and hoses and had a small but annoying leak I could not find for anything! these things arent magic in a bottle but its a really cheap way to try the easy way out and if not then oh well you are out a couple minutes and couple dollars and keep going forward….

### ⭐⭐⭐⭐⭐ The best product for stop leak!
*by J***N on August 15, 2025*

These work awesome! Do not bother with the other stop leak products!! I used a few of these to stop a leak in a 2005 Honda Element heater core months ago for a broke friend. Saved them a $800+ shop bill. Stopped the overheating issues due to coolant loss. Excellent product!!!

## Frequently Bought Together

- ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g
- Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems
- PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-28*