---
product_id: 725447025
title: "Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1"
brand: "flex seal liquid"
price: "¥1054956"
currency: JPY
in_stock: true
reviews_count: 5
category: "Flex Seal Liquid"
url: https://www.desertcart.jp/products/725447025-flex-seal-large-16-16-ounces-lfsblkr16-1
store_origin: JP
region: Japan
---

# Durable for years, weather & UV resistant Seals cracks & holes, waterproof barrier Rolls, brushes, or soaks on easily Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1

**Brand:** flex seal liquid
**Price:** ¥1054956
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it once, seal it right — Flex Seal your way to worry-free repairs!

## Quick Answers

- **What is this?** Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 by flex seal liquid
- **How much does it cost?** ¥1054956 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/725447025-flex-seal-large-16-16-ounces-lfsblkr16-1)

## Best For

- flex seal liquid enthusiasts

## Why This Product

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

## Key Features

- • **Easy DIY Fix:** Non-toxic, user-friendly formula perfect for quick home or auto repairs
- • **Broad Coverage:** 16oz covers approx. 20 sq. ft. — ideal for tackling leaks and cracks with confidence
- • **Versatile Application:** Brush, roll, or pour for seamless coverage on any surface
- • **Ultimate Waterproofing:** Creates a flexible rubber shield that blocks water, air, and moisture
- • **Long-Lasting Protection:** Withstands sun, rain, snow, hail, and extreme temperatures for years

## Overview

Flex Seal Liquid is a patent-pending, thick liquid rubber coating that dries into a strong, flexible, and waterproof barrier. It can be brushed, rolled, or poured to seal cracks, holes, and surfaces against water, air, and moisture. Designed for durability, it resists UV rays, extreme weather, and temperature fluctuations, making it a trusted solution for long-term protection on a variety of projects.

## Description

FLEX SEAL LIQUID is a proprietary patent pending formula that starts as a thick liquid and dries to a very strong, flexible waterproof rubber coating. FLEX SEAL LIQUID brushes, rolls, soaks, and pours to create a high performance protective rubber barrier that blocks air, water, and moisture from a variety of surfaces and objects. Once cured, FLEX SEAL LIQUID forms a durable, breathable, weather resistant, non-slip barrier that resists rain, snow, sun, wind, hail, air, moisture, UV degradation, extreme temperatures and natural weather. How to use: Stir well. Do not shake. Make sure the surface is clean and dry to avoid oil and dirt. Rub the surface with sandpaper or steel wool for better adhesion. Coverage varies depending on how much coat is used. Large 16oz - 1 pc approx. 20 sq. ft. Feet, 1 Jumbo 32oz - Approximately 40 sq. ft. foot, 1 gallon can - approximately 150 sq. ft. Ft., brush or roll FLEX SEAL LIQUID with an even sweep motion. Apply a coat of uniform several times until the surface is completely covered and all cracks and holes are filled. Allow FLEX SEAL LIQUID to dry for 24-48 hours and apply an additional coat if needed. Brush or roll over a larger area than the leaky area. Submersible objects directly to FLEX SEAL LIQUID will cause slight swirling. Once the surface is coated, remove excess items and return to the can. Hang or clip objects to dry in the same vertical position as they came out of the can. Pour FLEX SEAL LIQUID directly onto the surface and use gravity to bring FLEX SEAL LIQUID into cracks, holes, and hard-to-reach areas. It will continue to pour until the surface is covered and all cracks and holes are fully filled.

Review: Not cheap but fixed hot tub liner brilliant stuff will definitely buy again and easy to use
Review: Love this stuff! Was able to use it to help seal various different parts on my 69 Dodge Dart Project. Has a nice glossy texture and dries pretty quickly. Helps protect my components in my car and keeps them from cracking. It is a good texture for most any projects. I have used it on other applications too. It's nice that it's a versatile project that I can use for almost anything!

## Features

- Roller, Brush, or Roll On
- Non-toxic, easy to use
- Seeps into cracks and holes to seal water
- Will last for years to come

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B019PFO4KM |
| Amazon Bestseller | #760,505 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #830 in Hardware Sealers |
| Are Batteries Included | No |
| Brand | Flex Seal Liquid |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,083) |
| Date First Available | May 25, 2016 |
| Included Components | 16oz Flex Seal Fluid |
| Item Weight | 454 g |
| Material | Rubber |
| Model Number | LFSBLKR16 |
| Name List for Name Plates | Compact |
| Product Dimensions | 10.16 x 8.64 x 8.64 cm; 453.59 g |
| Wallpaper Pattern | Rubber |

## Product Details

- **Brand:** Flex Seal Liquid
- **Item Weight:** 454 g
- **Item dimensions L x W x H:** 10.2 x 8.6 x 8.6 cm
- **Material:** Rubber
- **Style:** Compact

## Images

![Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 - Image 1](https://m.media-amazon.com/images/I/514KVbW+cQL.jpg)
![Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 - Image 2](https://m.media-amazon.com/images/I/516h7TR5vqL.jpg)
![Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 - Image 3](https://m.media-amazon.com/images/I/516ze2ulYvL.jpg)
![Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 - Image 4](https://m.media-amazon.com/images/I/51GEIVQpYRL.jpg)
![Flex Seal??Large 16??????? 16 Ounces LFSBLKR16 1 - Image 5](https://m.media-amazon.com/images/I/51N-aPdMziL.jpg)

## Questions & Answers

**Q: Could I dip wooden chair legs in this to prevent them from scratching a wood floor?**
A: Yes, you can dip wooden chair legs but as you use the chairs the bottom will wear off. If they were my chairs I would use felt pads that you can find in any hardware store.

**Q: Would a metal surface become insulated electrically after this was applied? Thinking of a tight car battery compartment...**
A: Not enough to protect the battery from eventually shorting out. I would recommend securing a thick piece of rubber between the battery terminal and the metal close to it.

**Q: How long dose this take to dry**
A: It takes at least 24-48 hours for Flex Seal Liquid to dry based on the thickness of your application.

**Q: My child has a basketball post with a plastic base that holds water.  The base has a leak. Is this product suggested? If so, any prep suggested?**
A: Anything works better with a little prep., sandpaper and clean.  It should do well.  Also as a add the new tape would probably work better.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***N on June 25, 2017*

Not cheap but fixed hot tub liner brilliant stuff will definitely buy again and easy to use

### ⭐⭐⭐⭐⭐ Review
*by T***G on October 21, 2025*

Love this stuff! Was able to use it to help seal various different parts on my 69 Dodge Dart Project. Has a nice glossy texture and dries pretty quickly. Helps protect my components in my car and keeps them from cracking. It is a good texture for most any projects. I have used it on other applications too. It's nice that it's a versatile project that I can use for almost anything!

### ⭐ Review
*by M***N on July 23, 2020*

Received a crumbled can

## Frequently Bought Together

- Flex Seal Liquid, 16 oz, Black, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry
- Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows

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**Shop now:** [https://www.desertcart.jp/products/725447025-flex-seal-large-16-16-ounces-lfsblkr16-1](https://www.desertcart.jp/products/725447025-flex-seal-large-16-16-ounces-lfsblkr16-1)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-24*