---
product_id: 29509404
title: "AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz."
brand: "prestone"
price: "₩66636"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/29509404-as661-engine-block-stop-leak-with-kevlar-16-5-fl
store_origin: KR
region: South Korea
---

# Fast leak sealing Triple seal protection Compatible with all coolants AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz.

**Brand:** prestone
**Price:** ₩66636
**Availability:** ✅ In Stock

## Summary

> 🚗 Seal the leaks, save your ride!

## Quick Answers

- **What is this?** AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz. by prestone
- **How much does it cost?** ₩66636 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/29509404-as661-engine-block-stop-leak-with-kevlar-16-5-fl)

## Best For

- prestone enthusiasts

## Why This Product

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

## Key Features

- • **Quick Fix:** Stop leaks fast without blocking or corroding your cooling system.
- • **Seal the Deal:** Experience triple seal protection with DuPont Kevlar technology.
- • **Industry Leader:** Trust the latest innovation from the leader in cooling system products.
- • **Cost-Effective Solution:** Avoid costly engine repairs with this affordable leak fix.
- • **Universal Compatibility:** Designed to work seamlessly with any color of antifreeze/coolant.

## Overview

Prestone AS661 Engine Block Stop Leak is a 16.5 fl. oz. solution designed to quickly seal leaks in your cooling system. Featuring advanced DuPont Kevlar technology, it provides triple seal protection without causing blockages or corrosion. Compatible with all types of antifreeze and coolant, this product offers a cost-effective way to prevent expensive engine repairs, making it a must-have for any vehicle owner.

## Description

AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz.

## Features

- Triple seal protection made with DuPont Kevlar
- Stops cooling system leaks fast without blocking or corroding the cooling system
- Designed to seek out and seal leaks when added to any color of antifreeze/coolant
- Affordably fix engine block leaks and avoid expensive engine repairs
- Latest evolution from the leader in cooling system products

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Prestone |
| Brand | Prestone |
| Model | AS661 |
| Item Weight | 1.5 pounds |
| Package Dimensions | 9.8 x 2.4 x 1.4 inches |
| Item model number | AS661 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | AS661 |
| Voltage | 12 Volts |

## Images

![AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz. - Image 1](https://m.media-amazon.com/images/I/61s0v0aa9vL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.kr/products/29509404-as661-engine-block-stop-leak-with-kevlar-16-5-fl](https://www.desertcart.kr/products/29509404-as661-engine-block-stop-leak-with-kevlar-16-5-fl)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-05-12*