---
product_id: 13033032
title: "qt Flood FLD4 Penetrol Oil-Based Exterior Paint Additive"
brand: "flood"
price: "2158898₫"
currency: VND
in_stock: true
reviews_count: 13
url: https://www.desertcart.vn/products/13033032-qt-flood-fld4-penetrol-oil-based-exterior-paint-additive
store_origin: VN
region: Vietnam
---

# Reduces brush & roller marks by 30%+ Stops rust progression on metal surfaces Boosts adhesion to prevent peeling & blistering qt Flood FLD4 Penetrol Oil-Based Exterior Paint Additive

**Brand:** flood
**Price:** 2158898₫
**Availability:** ✅ In Stock

## Summary

> 🖌️ Elevate your exterior paint game—because your projects deserve a flawless finish.

## Quick Answers

- **What is this?** qt Flood FLD4 Penetrol Oil-Based Exterior Paint Additive by flood
- **How much does it cost?** 2158898₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/13033032-qt-flood-fld4-penetrol-oil-based-exterior-paint-additive)

## Best For

- flood enthusiasts

## Why This Product

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

## Key Features

- • **Extended Workability:** Slows drying time to let you achieve that coveted ‘brushless’ finish without rushing.
- • **Multi-Surface Mastery:** Optimized for metal, wood, and stone—your go-to additive for diverse exterior projects.
- • **Rust Arrestor & Preserver:** Effectively halts rust while preserving vintage metal patinas—perfect for upcycled projects.
- • **Flawless Finish Every Time:** Smooths brush strokes and roller marks for a professional-grade exterior paint job.
- • **Seamless Topcoat Compatibility:** Enhances adhesion and flow, making your clear coats glide on effortlessly and last longer.

## Overview

Flood FLD4 Penetrol is a premium oil-based exterior paint additive designed to reduce brush and roller marks, increase adhesion to prevent peeling and blistering, and stop rust on metal surfaces. Ideal for alkyd/oil paints, primers, and stains, it extends drying time for better application control and works seamlessly on metal, wood, and stone. Trusted by pros and DIYers alike, Penetrol preserves vintage patinas while delivering a smooth, durable finish.

## Description

NA

Review: and it worked fantastic. I purchased an old set of metal lockers ... - I used Penetrol for something other than it's stated purpose, and it worked fantastic. I purchased an old set of metal lockers that had quite a bit of rust on them. I wanted to preserve the patina of rust, but stop the metal from oxidizing any further. So after giving the surface a preliminary cleaning, I gave the entire thing a generous coating of Penetrol, with a second application on the most rusted spots. I used a rag to apply it. It went on evenly and didn't set up too quickly. I gave it 3 days to dry and then sprayed the entire things with polyurethane. It turned out fantastic -- absolutely beautiful. This is a great product to arrest further rusting, while allowing you to keep that vintage patina. You'll need to put the clear top-coat on over it, or it will feel a bit tacky, but with the Penetrol base, that top-coat goes on beautifully. And I've still got half a can left for my next project. It's not cheep, but it's really a nice product.
Review: Great product, but no longer sold through retailers in California. Buy on desertcart - Today, oil and water based paints are designed to dry very fast in order to comply with EPA guidelines. The result is good for the environment, but bad for the user as the paint dries almost as fast as you can put it on. Very frustrating. Using a bit of Flood's Penetrol in your oil-based paint will delay the drying time enough so you can achieve an almost 'brushless' finish, flow in your edges and manage old runs. To obtain the same results with water-based paints, use Flood's Flotrol. I tried to find Penetrol locally (in California), but it's unavailable due to my states strict air management standards. Luckily, it's still available on desertcart. This product can also be used as a sealer for many craft and art projects. It protects old metal and can be used to refinish and add luster to gel-coated surfaces.

## Features

- For Exterior Alkyd/Oil Paints, Primers And Stains
- Reduces brush and roller marks
- Increases adhesion to prevent peeling and blistering
- Improves penetration
- Stops and prevents rust

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001CSKEAU |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #950,739 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,102 in Interior & Exterior House Paint |
| Brand | Flood |
| Coverage | 2.5-3.5 sq ft/quart, 10-12 sq ft/gallon |
| Customer Reviews | 4.5 4.5 out of 5 stars (49) |
| Date First Available | August 17, 2005 |
| Finish | Matte |
| Finish Type | Matte |
| Included Components | .... |
| Indoor/Outdoor Usage | Outdoor |
| Is Waterproof | False |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Quarts |
| Item Weight | 2.25 pounds |
| Item model number | 00410 |
| Manufacturer | Flood |
| Material | oil based |
| Model Name | Penetrol |
| Package Information | Can |
| Paint Type | Oil |
| Part Number | FLD4-04 |
| Power Source | power_source_type |
| Product Dimensions | 4 x 3 x 4 inches |
| Shape | shape |
| Size | 32 Fl Oz (Pack of 1) |
| Special Feature | special_feature |
| Special Features | special_feature |
| Specific Uses For Product | Exterior |
| Surface Recommendation | Metal, Stone, Wood |
| UPC | 010273004100 |
| Unit Count | 32.0 Fluid Ounces |
| Volume | 1 Liters |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Flood
- **Finish Type:** Matte
- **Indoor/Outdoor Usage:** Outdoor
- **Item Volume:** 1 Quarts
- **Paint Type:** Oil
- **Size:** 32 Fl Oz (Pack of 1)
- **Special Feature:** special_feature
- **Specific Uses For Product:** Exterior
- **Surface Recommendation:** Metal, Stone, Wood
- **Unit Count:** 32.0 Fluid Ounces

## Images

![qt Flood FLD4 Penetrol Oil-Based Exterior Paint Additive - Image 1](https://m.media-amazon.com/images/I/71Vz-h43U0L.jpg)

## Questions & Answers

**Q: One review stated this was used to preserve a rust patina. Would this help automotive clear spray adhere and preserve the rust on an old milk can?**
A: I only used this product to remove a lot of old rust on an outdoor iron rack.  It didn't do the job.  Don't have experience with the other product or method you are attempting.

**Q: Why is it "exterior only"? Can it not be used with interior oil based paints? (with proper ventilation, I assume the fumes are bad)**
A: Yes you are correct.  When spraying the oil based paint along with penetrol are a bit overwelming with fumes.  I have used a mid priced automotive paint resporator to spray interior doors and trim.  Remember that oil based paints are hard to clean up(more masking, longer cleaning time, more spray gun cleaning, solvents, and lots of basic throwing away of brushes, rollers, trays, drop clothes)

**Q: Can I use penetrol as a top coat over enamel paint?**
A: I wouldn't.  That's not what it's for.  It's a paint additive to remove lap marks when the paint is still wet, and it works well as a way of preventing rust from further oxidation and keeping the patina of rust, but it's not a top coat the way that other clear coats might cover over paint.

**Q: Can this be used with water-based urethane alkyd enamel?**
A: This is only for oil based paint.

## Customer Reviews

### ⭐⭐⭐⭐⭐ and it worked fantastic. I purchased an old set of metal lockers ...
*by V***E on September 17, 2015*

I used Penetrol for something other than it's stated purpose, and it worked fantastic. I purchased an old set of metal lockers that had quite a bit of rust on them. I wanted to preserve the patina of rust, but stop the metal from oxidizing any further. So after giving the surface a preliminary cleaning, I gave the entire thing a generous coating of Penetrol, with a second application on the most rusted spots. I used a rag to apply it. It went on evenly and didn't set up too quickly. I gave it 3 days to dry and then sprayed the entire things with polyurethane. It turned out fantastic -- absolutely beautiful. This is a great product to arrest further rusting, while allowing you to keep that vintage patina. You'll need to put the clear top-coat on over it, or it will feel a bit tacky, but with the Penetrol base, that top-coat goes on beautifully. And I've still got half a can left for my next project. It's not cheep, but it's really a nice product.

### ⭐⭐⭐⭐⭐ Great product, but no longer sold through retailers in California. Buy on Amazon
*by G***N on January 27, 2017*

Today, oil and water based paints are designed to dry very fast in order to comply with EPA guidelines. The result is good for the environment, but bad for the user as the paint dries almost as fast as you can put it on. Very frustrating. Using a bit of Flood's Penetrol in your oil-based paint will delay the drying time enough so you can achieve an almost 'brushless' finish, flow in your edges and manage old runs. To obtain the same results with water-based paints, use Flood's Flotrol. I tried to find Penetrol locally (in California), but it's unavailable due to my states strict air management standards. Luckily, it's still available on Amazon. This product can also be used as a sealer for many craft and art projects. It protects old metal and can be used to refinish and add luster to gel-coated surfaces.

### ⭐⭐⭐⭐ The resulting protection is great although the finish makes the truck appear similar to ...
*by K***K on October 2, 2015*

I used the Penetrol to coat and protect the rusty patina on the cab of a 1949 flat bed truck. The resulting protection is great although the finish makes the truck appear similar to when it was wet and the sections that still have paint are darker than before. I would have preferred the original patina but this is much better than having the cab destroyed by the surface rusting completely through. It is the best solution available and can easily be prepped for painting should that alternative ever be desired.

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---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-11*