---
product_id: 49554709
title: "Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK"
brand: "stp"
price: "€ 15.21"
currency: EUR
in_stock: true
reviews_count: 13
category: "Stp"
url: https://www.desertcart.it/products/49554709-engine-stop-leak-for-petrol-and-diesel-engines-300-ml
store_origin: IT
region: Italy
---

# renews polymer seals & gaskets 300 ml concentrated formula Made in the UK quality Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK

**Brand:** stp
**Price:** € 15.21
**Availability:** ✅ In Stock

## Summary

> 🛠️ Stop leaks before they stop you – keep your engine running smooth!

## Quick Answers

- **What is this?** Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK by stp
- **How much does it cost?** € 15.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/49554709-engine-stop-leak-for-petrol-and-diesel-engines-300-ml)

## Best For

- stp enthusiasts

## Why This Product

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

## Key Features

- • **Engine Armor:** Boosts existing oil protection for longer engine life
- • **Compact Power:** 300 ml bottle packs a concentrated punch for multiple uses
- • **Seal the Deal:** Special agent renews heat-damaged seals to stop leaks fast
- • **Universal Fit:** Compatible with petrol & diesel engines in cars and trucks
- • **Trusted Quality:** UK-made with a 4.2-star rating from 779+ users

## Overview

STP Engine Stop Leak is a 300 ml concentrated formula designed to renew polymer seals and gaskets damaged by engine heat, preventing minor oil leaks and enhancing oil protection. Compatible with petrol and diesel engines, this UK-made product is trusted by thousands for reliable, cost-saving engine maintenance.

## Description

STP Engine Stop Leak is formulated with a special agent to renew polymer seals and gaskets damaged by the heat of normal engine operation, which can otherwise result in oil leaks and expensive mechanical work. STP Engine Stop Leak will also increase the protection offered by the existing engine oil.

Review: Excellent thank you - Very good indeed and does the job for small leaks very impressive
Review: It works - Worked perfect on my diesel golf engine ! Stopped the leak and the smell

## Features

- Causes serious eye damage.
- Suspected of damaging fertility or the unborn child.
- car parts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004NLMH4Y |
| Best Sellers Rank | 796 in Automotive ( See Top 100 in Automotive ) 53 in Car Engine Oils |
| Brand Name | STP |
| Compatible with Vehicle Type | Car, Truck |
| Container Type | Bottle |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.2 4.2 out of 5 stars (783) |
| Global Trade Identification Number | 05020144500834 |
| Included Components | Stop Leak |
| Item Type Name | Engine Stop Leak |
| Item Weight | 300 Grams |
| Liquid Volume | 300 Millilitres |
| Manufacturer | STP |
| Manufacturer Part Number | E302006100 |
| Unit Count | 300.0 millilitre |
| Viscosity | 5w_30 sae_grade |

## Product Details

- **Brand:** STP
- **Liquid volume:** 300 Millilitres
- **Package information:** Bottle
- **Vehicle service type:** Car, Truck
- **Viscosity:** 5w_30 sae_grade

## Images

![Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK - Image 1](https://m.media-amazon.com/images/I/61lN3GwrIVL.jpg)

## Questions & Answers

**Q: Can i use in any car**
A: yes you can

**Q: Will it stop a fule pump leak**
A: No it won’t doesn’t even stop engine leaks

**Q: Can you use on power steering leak which takes hydraulic oil?**
A: It didn’t work for my car the problem was something more serious

**Q: Is this an AT-205 alternative?**
A: No it's just an addition

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent thank you
*by J***M on 10 February 2026*

Very good indeed and does the job for small leaks very impressive

### ⭐⭐⭐⭐⭐ It works
*by N***R on 12 October 2025*

Worked perfect on my diesel golf engine ! Stopped the leak and the smell

### ⭐⭐⭐⭐ No effect
*by I***N on 24 November 2024*

More wishful thinking than worth applying BUT sump pan was already leaking so cannot blame this product too much!

## Frequently Bought Together

- STP Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK
- STP Engine Degreaser Professional Series 500ml, Penetrates and Dissolves Heavy Dirt and Deposits, Easily and Quickly Restore your Engine's Performance for a Smoother Engine

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**Shop now:** [https://www.desertcart.it/products/49554709-engine-stop-leak-for-petrol-and-diesel-engines-300-ml](https://www.desertcart.it/products/49554709-engine-stop-leak-for-petrol-and-diesel-engines-300-ml)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-05-05*