---
product_id: 379861148
title: "ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g"
brand: "acdelco"
price: "$9.66"
currency: USD
in_stock: true
reviews_count: 6
category: "Ac Delco"
url: https://www.desertcart.us/products/379861148-acdelco-gm-original-equipment-10-108-12378255-cooling-system-sealing
store_origin: US
region: United States of America
---

# 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:** $9.66
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it right, drive with confidence—don’t let leaks slow your hustle!

## 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?** $9.66 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/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

- • **Fast-Track Repairs:** Apply and torque bolts, then fill coolant/oil immediately—no wait time
- • **Durable & Resilient:** Withstands engine oils, coolants, and harsh conditions without corrosion
- • **Sensor-Safe Formula:** Oxygen sensor safe to keep your engine diagnostics flawless
- • **Pinpoint Application:** Tube design ensures mess-free, exact placement for professional results
- • **Precision Engineered Seal:** Seals oil pans, manifolds, cam covers & more with OEM-grade reliability

## Overview

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. Resistant to engine oils, coolants, corrosion, and blow-outs, this oxygen sensor-safe sealant ensures durable, professional-grade engine protection.

## 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: Work great best stop leak I've ever used in 60 years !!

## 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 | #9,315 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Cooling & Water Pump Tools |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,132) |
| 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

![ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g - Image 1](https://m.media-amazon.com/images/I/71bmUFAIe1L.jpg)

## Questions & Answers

**Q: Should I flush my engine oil before switching from conventional to synthetic oil or vice versa?**
A: No, it is not necessary to flush your engine when switching between motor oils. Typically, conducting a routine oil change and replacing the conventional oil with a synthetic motor oil will not require any additional maintenance.

**Q: Do I need a special oil filter for a synthetic oil?**
A: No, synthetic motor oil does not require you use a special filter. Oil filters are used based on vehicle specifications. Refer to your vehicle Owner’s Manual for guidance on what type of oil filter to use.

**Q: Is there a way to tell if my engine oil needs to be changed or is running low?**
A: Yes, if equipped, your vehicle’s oil life monitoring system will inform you when your motor oil needs to be changed. Refer to your vehicle Owner’s Manual for more specific guidelines.

**Q: Does my transmission fluid need to be changed as regularly as my oil?**
A: No, typically, transmission fluid lasts much longer than most engine oils. Refer to your vehicle Owner’s Manual to identify how often and when your transmission fluid should be changed. Severe usage and regular usage descriptions are provided.

**Q: Is there a difference between power steering fluid and transmission fluid?**
A: Yes, there is a difference. There are many types of transmission fluid. GM Genuine Parts and ACDelco recommend referring to your vehicle Owner’s Manual for fluid recommendations for all vehicle systems.

## Customer Reviews

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

Best product

### ⭐⭐⭐⭐⭐ Review
*by W***Y on 13 February 2025*

Work great best stop leak I've ever used in 60 years !!

### ⭐⭐⭐⭐⭐ Review
*by J***T on 25 February 2026*

Works great without harming system!

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-05-18*