---
product_id: 141627828
title: "Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz"
brand: "marine 31"
price: "€ 64.41"
currency: EUR
in_stock: true
reviews_count: 8
category: "Marine 31"
url: https://www.desertcart.com.cy/products/141627828-mildew-stain-remover-gel-thick-gel-formula-for-marine-boat
store_origin: CY
region: Cyprus
---

# Concentrated thick gel formula Fast-acting in 1-3 mins Safe for marine & vinyl surfaces Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz

**Brand:** marine 31
**Price:** € 64.41
**Availability:** ✅ In Stock

## Summary

> 🛥️ Clean Like a Pro, Protect Like a Captain!

## Quick Answers

- **What is this?** Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz by marine 31
- **How much does it cost?** € 64.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/141627828-mildew-stain-remover-gel-thick-gel-formula-for-marine-boat)

## Best For

- marine 31 enthusiasts

## Why This Product

- Trusted marine 31 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Marine-Grade Safe:** Protect your boat’s vinyl, fiberglass, and gel coat without discoloration or damage.
- • **Thick Gel Formula:** Clings to vertical surfaces for maximum cleaning impact where sprays fail.
- • **Rapid Stain Erasure:** Power through mildew and stains in just minutes—no scrubbing marathon needed.
- • **Versatile Surface Power:** From patios to bathrooms, one gel to conquer all stubborn stains.
- • **Unscented & Concentrated:** No overpowering smells, just pure cleaning strength in every drop.

## Overview

Marine 31 Mildew Stain Remover Gel is a powerful, fast-acting cleaner designed for marine and household use. Its thick, concentrated gel formula safely removes mildew and tough stains from vinyl, fiberglass, tile, and more without damaging surfaces or leaving odors. Ideal for boat owners and homeowners seeking a reliable, versatile stain remover that works in minutes.

## Description

desertcart.com: Marine 31 Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz : Health & Household

Review: Powerful - Arrived quickly. Works well. Do not get on clothes!
Review: Top Cleaner - Works well on stubborn mold.

## Features

- EASY TO USE: Simply spray the product directly onto the surface and allow to sit for 1 to 3 minutes. Agitate the surface with a brush or terry cloth towel and then thoroughly rinse and dry the surface.
- MULTIPLE USES: Safe for Boats, Vinyl, Tile, Grout, Patio, Coolers, and just about anywhere else that may accumulate stains. Marine 31 Mildew Stain Remover works like no other!
- SAFE: Erase these unwanted stains without the risk of discoloring, dulling or drying out vinyl seats or other fabrics. Even the most severe stains are no match for the cleaning power of Marine 31 Mildew Stain Remover.
- FAST WORKING: Marine 31 Mildew Stain Remover will quickly erase stains from marine surfaces including vinyl seat cushions, rubber fenders, fiberglass, gel coat, canopies & more without the need of abrasive power washing and/or scrubbing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07V47SPF8 |
| Best Sellers Rank | #149,105 in Health & Household ( See Top 100 in Health & Household ) #57 in Household Mold & Mildew Removers |
| Brand | Marine 31 |
| Brand Name | Marine 31 |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.6 out of 5 stars 591 Reviews |
| Included Components | (1) Marine 31 Mildew Stain Remover Gel 20 oz |
| Item Form | Gel |
| Item Type Name | Mildew Stain Remover Gel |
| Item Volume | 20 Fluid Ounces |
| Manufacturer | Marine 31 |
| Material Feature | Unscented |
| Material Features | Unscented |
| Number of Items | 1 |
| Scent | Unscented |
| Special Features | Concentrated |
| Specific Uses For Product | Bathtub, Deck, Shower, Sink, Tile |
| Surface Recommendation | Fiberglass |
| UPC | 082045630480 |
| Unit Count | 20 Fluid Ounces |
| Warranty Description | Standard Marine 31 Warranty |

## Product Details

- **Brand:** Marine 31
- **Item Form:** Gel
- **Material Feature:** Unscented
- **Scent:** Unscented
- **Specific Uses For Product:** Bathtub, Deck, Shower, Sink, Tile

## Images

![Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz - Image 1](https://m.media-amazon.com/images/I/51RthgY5PZS.jpg)

## Questions & Answers

**Q: could this be used on a canvas boat cover?**
A: Try it on a small section first to see what happens.  I got some of it on my shorts and it bleached them.  It is powerful stuff.

**Q: Is it safe for cars?**
A: Yes

**Q: Is this safe to use on colored vinyl**
A: I used it on white and blue vinyl and it worked very well.

**Q: Is this only a whitener or does it also disinfect and get rid of the actual mildew?**
A: This is the best product I have found to get rid of mildew on my boat seats and other area. I would suggest if it kills mildew it would also disinfect as well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Powerful
*by K***S on October 29, 2025*

Arrived quickly. Works well. Do not get on clothes!

### ⭐⭐⭐⭐⭐ Top Cleaner
*by M***N on November 4, 2025*

Works well on stubborn mold.

### ⭐⭐⭐⭐⭐ Excellent product. Works better than any other product of its type.
*by A***R on June 8, 2025*

Excellent product. Works better than any other product of its type.

## Frequently Bought Together

- Marine 31 Mildew Stain Remover Gel | Thick Gel Formula for Marine, Boat, Home & Patio | Removes Mildew & Stains from Bathrooms & Showers | Effective Cleaner | M31-375 | 20oz
- 303 (30306) Marine UV Protectant Trigger Sprayer, 32 fl. Oz
- Marine 31 Mildew Stain Remover & Cleaner | Effective for Boats, Home, Patio, & Bathroom | Removes Mildew & Mold Stains | Powerful Cleaning Formula | 16oz

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**Shop now:** [https://www.desertcart.com.cy/products/141627828-mildew-stain-remover-gel-thick-gel-formula-for-marine-boat](https://www.desertcart.com.cy/products/141627828-mildew-stain-remover-gel-thick-gel-formula-for-marine-boat)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-01-30*