---
product_id: 379861148
title: "GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g"
brand: "acdelco"
price: "50 zł"
currency: PLN
in_stock: true
reviews_count: 6
category: "Ac Delco"
url: https://www.desertcart.pl/products/379861148-gm-original-equipment-10-108-12378255-cooling-system-sealing-tabs
store_origin: PL
region: Poland
---

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

**Brand:** acdelco
**Price:** 50 zł
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it right, drive with might!

## Quick Answers

- **What is this?** GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g by acdelco
- **How much does it cost?** 50 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/379861148-gm-original-equipment-10-108-12378255-cooling-system-sealing-tabs)

## 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 Repairs:** Apply and torque bolts, then fill coolant or oil immediately—no downtime
- • **Durable & Resilient:** Withstands engine oils, coolants, and prevents corrosion for long-lasting protection
- • **Sensor-Safe Formula:** Oxygen sensor safe to keep your engine diagnostics flawless
- • **Pinpoint Application:** Comes in a tube for mess-free, exact placement every time
- • **Precision Engineered Versatility:** 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 designed for quick, durable sealing of engine components. Resistant to oils, coolants, and corrosion, it cures on exposure to air and allows immediate refilling of fluids post-application. Trusted by professionals and rated 4.6 stars, it ensures OEM-level performance and sensor safety for reliable 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
Review: J'avais peu d'espoir car j'avais une bonne fuite du radiateur,mais sa fonctionne a merveille

## 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 | #6,708 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Cooling & Water Pump Tools |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,111) |
| Date First Available | 7 August 2012 |
| Exterior | Machined |
| Item Weight | 31.8 g |
| 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
- **Colour:** Silver
- **Material:** Alloy Steel
- **UPC:** 036666919363

## Images

![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

### ⭐⭐⭐⭐⭐ Review
*by F***Z on 20 July 2025*

J'avais peu d'espoir car j'avais une bonne fuite du radiateur,mais sa fonctionne a merveille

### ⭐⭐⭐⭐⭐ Review
*by M***R on 18 May 2023*

اوقف التسرب من اليوم الأول بعد معاناة لسنوات - شفرولية كروز ( يجب طحن المنتج ووضعة في الراداتير مباشرة أو في الخرطوم العلوي الواصل للرادتير لو دورة التربيد مغقلة ) ممنوع تضعة في قربة المياة

## 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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**Shop now:** [https://www.desertcart.pl/products/379861148-gm-original-equipment-10-108-12378255-cooling-system-sealing-tabs](https://www.desertcart.pl/products/379861148-gm-original-equipment-10-108-12378255-cooling-system-sealing-tabs)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-01*