The grout throughout the rim area between the glass and the metal frame of my glass windows has deteriorated and leaks. Will it seal this?

Hello, thank you for reaching out! Many people have had success using https://www.amazon.com/dp/B00OX6OU5S to seal their grout.

I have a leak on my shower drain, would this work to seal the leak on PVC pipe?

Yes many people have had great success sealing their pipes with Flex Seal.

Will flex seal work on concrete? I have a leak in my koi pond, would flex seal hold the leak while being underwater?

Yes many people have had great success using Flex Seal on concrete. We recommend using Flex Seal Liquid on your koi pond though since it is plant and animal safe. Flex Seal in the aerosol can is not animal safe.

I have a couple of cracks in a plastic pond shell. Around 100 gallon pond. Would this seal them?

the tape might do the job--I sprayed on to a faux leather chair -- it's peeling off--I might get more tape seal..

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Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

Product ID: 256348929

Details

Brand
Flex Seal
Item dimensions L x W x H
24.1 x 6.4 x
Item weight
14 Ounces
Material
Plastic
Style
Black 14 oz

💧Instant waterproof seal

🌧️Durable weatherproof coating

🛠️14 oz powerful spray

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

¥8722

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

🛡️ Seal it, forget it — leak-proof your life with Flex Seal!

COMPACT PORTABLE - 14 oz can fits easily in your toolkit for on-the-go emergency repairs.
TRUSTED BY DIY PROS - Ranked #140 in Hardware Sealers, join thousands who rely on Flex Seal for fast fixes.
SPRAY SEAL IN SECONDS - Effortlessly stops leaks with a quick spray-on application.
WEATHERPROOF FLEXIBLE - Creates a rubberized, waterproof barrier that flexes with surfaces to prevent cracks.
VERSATILE SURFACE COMPATIBILITY - Perfect for gutters, wood, RVs, roofs, skylights, and windows—one product, endless fixes.

Flex Seal is a 14-ounce black rubber spray sealant designed to instantly stop leaks and waterproof a variety of surfaces including gutters, wood, RVs, roofs, skylights, and windows. Its durable, flexible coating withstands weather conditions, making it a trusted choice for quick, reliable home and outdoor repairs.

Specifications

ASIN	B00CD9FGNW
Best Sellers Rank	#47,893 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #298 in Hardware Sealers
Brand	Flex Seal
Brand Name	Flex Seal
Color	Black
Compatible Material	Rubber, Wood, Metal, Glass, Plastic, Concrete, etc.
Customer Reviews	4.4 out of 5 stars 10,603 Reviews
Global Trade Identification Number	00855647003019
Included Components	Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Item Dimensions	24.1 x 6.4 x 6.4 centimeters
Item Form	Spray
Item Type Name	Flex Seal Spray Rubber Sealant Coating, 14-oz, Black
Item Weight	14 Ounces
Item dimensions L x W x H	24.1 x 6.4 x 6.4 centimeters
Item weight	14 Ounces
Manufacturer	Swift Response, LLC
Material	Plastic
Material Type	Plastic
Model	FLEX SEAL - FSR20
Number of Items	1
Part Number	FSR20
Style	Black, 14 oz, 1-Pack
Style Name	Black, 14 oz, 1-Pack
Surface Recommendation	Roof,Windows,Wood
UPC	855647003019
Unit Count	28 Grams
Water Resistance Level	Waterproof
Water resistance level	Waterproof

Reviews

A**F

Poor prodect

Not useable

18.06.2021

D**L

Good

27.12.2023

S**O

Atende a expectativa.

Produto resolveu um problema entre a calha e a parede evitando escorrimento de água da chuva mostrou-se mais eficiente que o veda calha. Esperar para ver a durabilidade do produto sob as intempéries.

7.04.2021

C**N

Resistencia e impermeable en grietas .

La verdad, mejores resultados a los esperados, selló muy bien las grietas que me Quedaron después de instalar techo de madera en la terraza , resiste espectacular

7.07.2021

S**Y

FlexSeal spray is fantastic

FlexSeal spray is a great product. Used it in conjunction with FlexSeal Rubber to stop a leak in the house gutter. Sprays easy and builds up nicely. Great Product.

26.10.2025

T**Y

fantastic service

Excellent product, arrived the next day. A++++

12.05.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews