---
product_id: 392705817
title: "Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz."
brand: "hi-gear"
price: "¥510"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/392705817-hi-gear-hg9048s-insta-seal-permanent-block-sealer-8-fl
store_origin: JP
region: Japan
---

# 8 fl. oz. capacity Compatible with all antifreeze Repairs all leaks Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

**Brand:** hi-gear
**Price:** ¥510
**Availability:** ✅ In Stock

## Summary

> 🔒 Seal it, don’t stress it!

## Quick Answers

- **What is this?** Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. by hi-gear
- **How much does it cost?** ¥510 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/392705817-hi-gear-hg9048s-insta-seal-permanent-block-sealer-8-fl)

## Best For

- hi-gear enthusiasts

## Why This Product

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

## Key Features

- • **Seal the Deal:** Permanently repairs leaks in gaskets, radiators, and more!
- • **Versatile Fix:** Works on plastic, aluminum, and cast iron—your all-in-one solution!
- • **No Drain, No Pain:** Compatible with all antifreeze types—no draining required!
- • **Warranty Friendly:** Rest easy—this won't void your manufacturer's warranty!
- • **Advanced Technology:** Ceramic micro-fibers and copper create a strong, lasting bond!

## Overview

The Hi-Gear HG9048s Insta-Seal Permanent Block Sealer is an 8 fl. oz. solution designed to permanently repair leaks in various automotive components, including gaskets, radiators, and intake manifolds. Its advanced formula is compatible with all antifreeze types and does not require draining, making it a versatile and warranty-friendly choice for car maintenance.

## Description

Hi-Gear products' cooling system additives have set a new standard for quality and performance in the automotive industry. As new technology evolves and is introduced by original equipment manufacturers, the product that maintain and treat equipment need to evolve as well. Hi-Gear Products' research and development experts are constantly upgrading formulations and offering new and innovative products. Shop technicians and consumers rely on Hi-Gear Insta-Seal. Insta-Seal seeks out the low pressure area formed by cracks and holes and deposits the ceramic micro-fibers and copper as it flows through the crack. Within seconds the crack or hole is completely filled and the seal is complete. Engine heat further welds the seal so that it will last the life of the engine. Insta-Seal fixes both large and small leaks in plastic, aluminum and cast iron intakes, heads, blocks and radiators. Safely use Insta-Seal with all types of antifreeze including conventional green or blue (silicate-based) and extended life red/orange or yellow (OAT/HOAT) coolants. Insta-Seal will not harm the cooling system when used properly. Insta-Seal quickly and effectively seals leaks in gasoline and diesel cars, trucks, vans, SUVs and RVs. Compatible with all types of glycol-based coolants.

## Features

- Permanently repairs leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads and freeze plugs
- Compatible with all types of antifreeze and no draining required
- Insta-Seal fixes both large and small leaks in plastic, aluminum and cast iron intakes, heads, blocks and radiators
- Insta-Seal will not void the manufacturer's warranty
- Ceramic micro-fibers, copper and heat combine to "weld" both large and small cracks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Plastic |
| Brand | Hi-Gear |
| Style | Liquid ceramic-microfiber and copper sealant |
| Item Weight | 9.6 ounces |
| Item dimensions L x W x H | 2.25 x 2.25 x 7.13 inches |
| Water Resistance Level | Water Resistant |
| Item Form | Liquid |
| UPC | 009603190484 |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00009603190484 |
| Number of Items | 1 |
| Manufacturer | Hi-Gear Products, Inc. |
| Model | HG9048s |
| Product Dimensions | 2.25 x 2.25 x 7.13 inches |
| Item model number | HG9048s |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | HG9048S |

## Product Details

- **Material:** Plastic
- **Brand:** HI-GEAR
- **Style:** Liquid ceramic-microfiber and copper sealant
- **Item weight:** 0.6 Pounds
- **Item dimensions L x W x H:** 5.7 x 5.7 x 18.1 centimeters

## Images

![Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. - Image 1](https://m.media-amazon.com/images/I/51xvmpfhAPL.jpg)
![Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. - Image 2](https://m.media-amazon.com/images/I/61vhsxqk5oL.jpg)
![Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. - Image 3](https://m.media-amazon.com/images/I/6110UmCEutL.jpg)
![Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. - Image 4](https://m.media-amazon.com/images/I/61Ch3Uf0JwL.jpg)
![Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. - Image 5](https://m.media-amazon.com/images/I/71vt8GMTHDL.jpg)

## Questions & Answers

**Q: After you use it you have to change the motor oil my oil  look like milk ?**
A: A water cooling system leak into the interior of the engine mixing with the oil lubricating system produces a yellowish off white foam.  Either a cracked block or head or a leaking head gasket are the usual suspect for this.  I even have had a badly leaking cooling tube under the intake manifold on a 4.6 Liter Ford that no coolant leak additive could fix--a removal of intake manifold and replacement of tube was the only fix.  It is very common for Aluminum head/block warpage due to even a one time overheating to cause head gasket leakage that only engine teardown and having the warp leveled can fix.  For reasonably small leaks, I have used radiator sealer to stop them.

**Q: Do you have to flush the radiator first?**
A: Yes, I would flush it first, then add the installation seal.

**Q: Does it says for how many cylinders it will work per .oz used**
A: Didn't work on 6 cylinder for me.

**Q: Will this work on a cracked block and water cooled manifold in a closed Mercruiser 5.7 liter V8 boat engine?  Thanks.**
A: It depends on how big the crack is.  If very big probely not.  My experience with with water manifold not likely.

## Frequently Bought Together

- Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.
- K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
- K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-28*