---
product_id: 82132425
title: "K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks"
brand: "k-seal"
price: "$84"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/82132425-k-seal-st3501-pour-and-go-head-gasket-sealer-16oz
store_origin: NZ
region: New Zealand
---

# Seals leaks up to 0.64mm Compatible with all coolants & engines 33% more sealing power K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks

**Brand:** k-seal
**Price:** $84
**Availability:** ✅ In Stock

## Summary

> 🚗 Seal the deal—drive worry-free with permanent power!

## Quick Answers

- **What is this?** K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks by k-seal
- **How much does it cost?** $84 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/82132425-k-seal-st3501-pour-and-go-head-gasket-sealer-16oz)

## Best For

- k-seal enthusiasts

## Why This Product

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

## Key Features

- • **Permanent Power Seal:** 33% stronger formula for a lifetime fix
- • **Pour & Go Simplicity:** No draining or flushing—just shake, pour, and drive
- • **One-Step Leak Stopper:** Ceramic micro-fibres seal cracks up to 0.64mm effortlessly
- • **Mechanic-Trusted Reliability:** Independently tested, millions sold worldwide
- • **Universal Engine Compatibility:** Works seamlessly with all coolants and engine types

## Overview

ST3501 Pour and Go Head Gasket Sealer delivers a professional-grade, permanent repair for blown head gaskets, cracked heads, and porous engine blocks. Featuring a formula with 33% more sealing power and ceramic micro-fibres, it seals leaks up to 0.64mm without engine downtime. Compatible with all coolants and engine materials, this easy-to-use additive requires no draining or flushing—just shake, pour, and go. Trusted by mechanics and independently verified, it’s a cost-effective, long-lasting solution that enhances your vehicle’s cooling system performance.

## Description

Introducing the K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair, a revolutionary solution for head gasket leaks. This 16 fl. oz. bottle of head gasket stop leak is your ultimate solution to costly and time-consuming head gasket repairs. With K-Seal, you have the best head gasket sealer at your disposal, designed to provide a permanent fix for blown head gaskets, cracked heads, and blocks. No need for a professional mechanic – this is a universal fit product that anyone can use. The K-Seal ST3501 is not just a head gasket leak sealer; it doubles as a block sealer for engines, effectively sealing any coolant leaks. It guarantees a lifetime of reliable performance. What sets K-Seal apart is the simplicity of its application. Just Pour & Go – there's absolutely no need for expensive head gasket repairs. As a head gasket fix, it's designed for ease of use. No need for a head gasket test kit or a head gasket repair kit. This product is a coolant leak sealer and head gasket repair in one, eliminating the need for a separate head gasket test. K-Seal is scientifically tested, and the only product to have been successfully tried by Brighton University, meeting the demands of ASTM D3147. If you're dealing with a head leak, antifreeze coolant stop leak, or need a head gasket additive, choose K-Seal. It's the safe and easy way to fix a coolant leak, and is ideal for use as a head seal, head gasket seal, and head gasket spray. Trust K-Seal for your head gasket repair needs and experience the ultimate in head gasket solutions.

## Features

- PERMANENT REPAIR: Our advanced formula with 33% more sealing power than regular K-Seal, ensures a long-lasting, permanent seal for challenging leaks. Permanently fixes blown head gaskets, cracked heads & porous engine blocks in cars
- STOP HOLES & CRACKS: With just 1 step our unique formula with ceramic micro-fibres, will permanently seal leaks up to 0.64mm in size, without any adverse impact on the engine
- EASY TO USE: It requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid wherever you top up your coolant & run your engine as normal. For larger engines (HGV's / Plant) use 2 bottles
- VERSATILE COMPATIBILITY: Works with all types of coolant & compatible with a wide range of vehicle engine materials & heavy duty machinery. A permanent fix for the lifetime of the engine
- PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our sealer treatment delivers a durable & long-lasting repair. A cost-effective head gasket & block repair, enhancing the performance of your vehicle’s cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Solv-Tec |
| Brand | K-Seal |
| Model | ST3501 |
| Item Weight | 1 pounds |
| Product Dimensions | 2.5 x 2.5 x 8 inches |
| Item model number | KSLST3501 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | KSLST3501 |

## Images

![K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks - Image 1](https://m.media-amazon.com/images/I/81bAemVWaKL.jpg)

## Questions & Answers

**Q: Is it okay to continue to idle the car with engine and brake lights on with liquid coming out of radiator? It says to idle for 20 minutes**
A: The system should be sealed as the product circulates though it for the 20 minutes.

**Q: Does it  use Sodium Silicate?**
A: Nowhere on the bottle does it say sodium silicate.

**Q: I have a 1999 ford ranger. running fine now but it is getting older. can i use this as a preventative? or do i need to wait for a problem to show up?**
A: The way K seal works is by seeking out leaks in a pressurized system. I feel you or best bet would be to wait until you know your leaking coolant. I use this in a truck about 7 months ago and I still have no problems with the truck. Work very well

**Q: can i make a 100 make a 100 mile trip 10 minuets after i put the k-seal in...**
A: Yes! It does it's magic within 10 minutes. Just don't drive it too hard for about 20 minutes. Drive smooth. Highway driving or a good road with a consistent speed is best. After 20 minutes, you are all good!

## Frequently Bought Together

- K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks
- K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
- K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 16 oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-24*