---
product_id: 379861148
title: "ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g"
brand: "acdelco"
price: "¥1602"
currency: JPY
in_stock: true
reviews_count: 1
category: "Ac Delco"
url: https://www.desertcart.jp/products/379861148-acdelco-gm-original-equipment-10-108-12378255-cooling-system-sealing
store_origin: JP
region: Japan
---

# Instant oil/coolant fill post-application High viscosity, air-cure sealant Blow-out & corrosion resistant ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g

**Brand:** acdelco
**Price:** ¥1602
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it right, seal it tight—engineered for pros who won’t settle.

## Quick Answers

- **What is this?** ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g by acdelco
- **How much does it cost?** ¥1602 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/379861148-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

- • **Gap-Filling Power:** High elongation formula seals even large gaps flawlessly
- • **Fast-Track Repairs:** Apply once, torque bolts, and refill coolant/oil immediately—no downtime
- • **Pinpoint Application:** Tube design ensures mess-free, exact placement every time
- • **Durability Meets Safety:** Resists engine oils, coolants, and won’t corrode metal parts or sensors
- • **Precision Engineered Seal:** Seals oil pans, manifolds, cam covers & more with OEM-grade reliability

## Overview

The ACDelco GM Original Equipment 10-108 Cooling System Sealing Tabs deliver a high-viscosity, one-component RTV sealant that cures on exposure to air. Designed for quick, precise application on multiple engine components, it allows immediate refilling of oil or coolant post-assembly. This blow-out resistant, corrosion-safe sealant withstands harsh engine oils and coolants while protecting sensitive oxygen sensors, making it a trusted choice for professional-grade engine maintenance.

## 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: Radiator leak seal - Best product

## 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 |
| Auto Part Position | Front |
| Auto part position | Front |
| Best Sellers Rank | #7,315 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Cooling & Water Pump Tools |
| Brand | ACDelco |
| Brand Name | ACDelco |
| Color | Silver |
| Colour | Silver |
| Country Of Origin | USA |
| Customer Reviews | 4.6 out of 5 stars 1,126 Reviews |
| Item Type Name | AC Delco |
| Item Weight | 32 g |
| Manufacturer | ACDELCO |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model | 10-108 |
| UPC | 036666919363 |

## Product Details

- **Auto part position:** Front
- **Brand:** ACDelco
- **Colour:** Silver
- **Material:** Alloy Steel
- **UPC:** 036666919363

## Images

![ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g - 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

### ⭐⭐⭐⭐⭐ Radiator leak seal
*by S***S on 19 August 2022*

Best product

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-07*