--- title: "window crack sealer — Niche Verdict: Skip it (38/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/window-crack-sealer" last_updated: "2026-07-10T01:39:00.780Z" locale: en meta: description: "a small market ($52K/yr) — window crack sealer doesn't clear our bar today." "og:description": "a small market ($52K/yr) — window crack sealer doesn't clear our bar today." "og:title": "window crack sealer — Niche Verdict: Skip it (38/100) | Amazon United States - Flapen" --- Back to Flapen home # **window crack sealer** **Skip it****38/100 ** a small market ($52K/yr) — window crack sealer doesn't clear our bar today. **Market/yr** **$52K** **Growth (1y)** **+108.2%** **Products** **17** **Brands** **8** was 4 a year ago **Sellers** **71** **Price range** **$5.20–$25.92** **Returns** **0.8%** **Rating** **4.4★** **Skip it** Scored 38/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **3** ×0.30 Growth **66** ×0.30 Competition **18** ×0.20 Quality gap **50** ×0.10 Returns **93** ×0.10 ## **Demand** Weekly Amazon search volume, last 96 weeks — +108.2% year over year. 1K663.5Prime Day '25Sep '24Dec '24Apr '25Aug '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND No pronounced peak months · busiest ÷ quietest = 1.3× ## **Competition** - Permatex55% - Griot's Garage35% - 303 Products2% - CERAKOTE2% - CARPRO2% - DZCKTFYGRT1% - Other (2 brands)3% The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack. 8 brands and 71 sellers compete here. **Brands** **8 **▲rising was 4 a year ago **Sellers** **71** **Top 5 brand share** **96%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Permatex 81730 1.5 Oz Flowable Silicone Windshield & Glass Sealer](https://m.media-amazon.com/images/I/41aB4iRQ0vL.jpg) [**Permatex 81730 1.5 Oz Flowable Silicone Windshield & Glass Sealer**](https://www.amazon.com/dp/B01MS90CJU) Permatex$6.994.7★34325%▲rising 2 ![Griots Garage Ceramic Glass Coating Kit for Cars SiO2 Hydrophobic Sealant for Windshields and Auto Detailing Includes Applicator Pad and Microfiber Towels 10867](https://m.media-amazon.com/images/I/41V9w7LDdNL.jpg) [**Griots Garage Ceramic Glass Coating Kit for Cars SiO2 Hydrophobic Sealant for Windshields and Auto Detailing Includes Applicator Pad and Microfiber Towels 10867**](https://www.amazon.com/dp/B0DPLHJVQD) Griot's Garage$22.004.4★21721%▲rising 3 ![Permatex 81730 Flowable Silicone Windshield and Glass Sealer 1.5 oz.](https://m.media-amazon.com/images/I/41lbmrl5WpL.jpg) [**Permatex 81730 Flowable Silicone Windshield and Glass Sealer 1.5 oz.**](https://www.amazon.com/dp/B000BKEBO0) Permatex$7.654.3★5,86519%▲rising 4 ![Griots Garage Glass Sealant Coating for Cars Trucks SUVs and More for Water Spots 11033 8oz](https://m.media-amazon.com/images/I/41GtLPD6VYL.jpg) [**Griots Garage Glass Sealant Coating for Cars Trucks SUVs and More for Water Spots 11033 8oz**](https://www.amazon.com/dp/B00AX4TWCA) Griot's Garage$13.394.4★1,7349%▼falling 5 ![Permatex 81730 Flowable Silicone Windshield Glass Sealer 1.5 oz. (2 Pack)](https://m.media-amazon.com/images/I/41YZ3hZJfbL.jpg) [**Permatex 81730 Flowable Silicone Windshield Glass Sealer 1.5 oz. (2 Pack)**](https://www.amazon.com/dp/B07GFVZ77Z) Permatex$13.424.4★3694%▲rising 6 ![Permatex 81158 Black Silicone Adhesive Sealant 3 oz. Tube Pack of 1](https://m.media-amazon.com/images/I/41UrLsBzcuL.jpg) [**Permatex 81158 Black Silicone Adhesive Sealant 3 oz. Tube Pack of 1**](https://www.amazon.com/dp/B000AL6WLA) Permatex$5.794.6★11,7103%▲rising 7 ![Permatex 4-Pack Flowable Silicone Windshield & Glass Sealer 1.5 oz Clear Waterproof](https://m.media-amazon.com/images/I/513z4zAGmEL.jpg) [**Permatex 4-Pack Flowable Silicone Windshield & Glass Sealer 1.5 oz Clear Waterproof**](https://www.amazon.com/dp/B07Q32Z31V) Permatex$20.514.6★1863%▲rising 8 ![303 Products Touchless Sealant - SiO2 Water Activated Paint & Glass Protection - Spray On Rinse Off - Lasts 2X Longer Than W- Deep Wet Shine 32 fl. oz. (30394CSR)](https://m.media-amazon.com/images/I/41LZSeluG2L.jpg) [**303 Products Touchless Sealant - SiO2 Water Activated Paint & Glass Protection - Spray On Rinse Off - Lasts 2X Longer Than W- Deep Wet Shine 32 fl. oz. (30394CSR)**](https://www.amazon.com/dp/B07NJXYQBW) 303 Products$25.834.6★1,8722%—flat 9 ![Griots Garage Glass Cleaning Clay for Car Window Windshield Shower Door Stone Ceramic Tiles Removes Oil Tar Grease Water Spots and More 11049 3.5oz Blue](https://m.media-amazon.com/images/I/41P5nTg7xzL.jpg) [**Griots Garage Glass Cleaning Clay for Car Window Windshield Shower Door Stone Ceramic Tiles Removes Oil Tar Grease Water Spots and More 11049 3.5oz Blue**](https://www.amazon.com/dp/B004UQQT0A) Griot's Garage$18.584.4★1,4192%—flat 10 ![CERAKOTE Ceramic Glass Coat Protectant - Hydrophobic Automotive Rain Repellant Long-Lasting and Durable Ceramic Coating Quick and Easy Application](https://m.media-amazon.com/images/I/41lwo3xVPML.jpg) [**CERAKOTE Ceramic Glass Coat Protectant - Hydrophobic Automotive Rain Repellant Long-Lasting and Durable Ceramic Coating Quick and Easy Application**](https://www.amazon.com/dp/B0CQN1RXYB) CERAKOTE$9.694.4★1,7602%—flat 11 ![Permatex 80050 Clear RTV Silicone Adhesive Sealant 3 oz](https://m.media-amazon.com/images/I/41VgMnT8V8L.jpg) [**Permatex 80050 Clear RTV Silicone Adhesive Sealant 3 oz**](https://www.amazon.com/dp/B0002UEPVI) Permatex$5.654.6★8,4282%▲rising 12 ![CARPRO FlyBy30 Glass Sealant: Professional Windshield Window & Glass Coating - Rain Shower Water Repellent & Car Glass Treatment - 20mL](https://m.media-amazon.com/images/I/31LxBFwub9L.jpg) [**CARPRO FlyBy30 Glass Sealant: Professional Windshield Window & Glass Coating - Rain Shower Water Repellent & Car Glass Treatment - 20mL**](https://www.amazon.com/dp/B00NIEAE10) CARPRO$25.924.6★72%▲rising 13 ![Griots Garage Ceramic Glass Cleaner Spray for Car Windows Windshields Mirrors and Home Use Cleans and Protects Streak-Free 10835 22oz](https://m.media-amazon.com/images/I/41Btx+My6SL.jpg) [**Griots Garage Ceramic Glass Cleaner Spray for Car Windows Windshields Mirrors and Home Use Cleans and Protects Streak-Free 10835 22oz**](https://www.amazon.com/dp/B09S82G5V5) Griot's Garage$8.554.4★6922%▼falling 14 ![DZCKTFYGRT Windshield Crack Repair Kit 2025 New Premium Windshield Repair Kit Quick Glass Repair Liquid for Windshields Windows Mirrors and All Glass Crack Types2pcs](https://m.media-amazon.com/images/I/51vI60wQQ2L.jpg) [**DZCKTFYGRT Windshield Crack Repair Kit 2025 New Premium Windshield Repair Kit Quick Glass Repair Liquid for Windshields Windows Mirrors and All Glass Crack Types2pcs**](https://www.amazon.com/dp/B0F3JBBLTT) DZCKTFYGRT$11.823.1★1911%▲rising 15 ![Adams Polishes Glass Sealant 2.0 4oz - Super Concentrated Easy Application - Water Simply Rolls Off Treated Surfaces - Designed to Bead Water and Keep Glass Clean](https://m.media-amazon.com/images/I/31W0gQToBdL.jpg) [**Adams Polishes Glass Sealant 2.0 4oz - Super Concentrated Easy Application - Water Simply Rolls Off Treated Surfaces - Designed to Bead Water and Keep Glass Clean**](https://www.amazon.com/dp/B00JNIYDR6) Adam's Polishes$14.524.2★1701%—flat **~~Showing 15 of 17 — show all ~~** ## **Product shelf** All 17 tracked products in this niche. Top sellersNewestTrending [![Permatex 81730 1.5 Oz Flowable Silicone Windshield & Glass Sealer](https://m.media-amazon.com/images/I/41aB4iRQ0vL.jpg)**Permatex 81730 1.5 Oz Flowable Silicone Windshield & Glass Sealer** Permatex**$6.99**4.7★343 reviews](https://www.amazon.com/dp/B01MS90CJU) [![Griots Garage Ceramic Glass Coating Kit for Cars SiO2 Hydrophobic Sealant for Windshields and Auto Detailing Includes Applicator Pad and Microfiber Towels 10867](https://m.media-amazon.com/images/I/41V9w7LDdNL.jpg)**Griots Garage Ceramic Glass Coating Kit for Cars SiO2 Hydrophobic Sealant for Windshields and Auto Detailing Includes Applicator Pad and Microfiber Towels 10867** Griot's Garage**$22.00**4.4★217 reviews](https://www.amazon.com/dp/B0DPLHJVQD) [![Permatex 81730 Flowable Silicone Windshield and Glass Sealer 1.5 oz.](https://m.media-amazon.com/images/I/41lbmrl5WpL.jpg)**Permatex 81730 Flowable Silicone Windshield and Glass Sealer 1.5 oz.** Permatex**$7.65**4.3★5,865 reviews](https://www.amazon.com/dp/B000BKEBO0) [![Griots Garage Glass Sealant Coating for Cars Trucks SUVs and More for Water Spots 11033 8oz](https://m.media-amazon.com/images/I/41GtLPD6VYL.jpg)**Griots Garage Glass Sealant Coating for Cars Trucks SUVs and More for Water Spots 11033 8oz** Griot's Garage**$13.39**4.4★1,734 reviews](https://www.amazon.com/dp/B00AX4TWCA) [![Permatex 81730 Flowable Silicone Windshield Glass Sealer 1.5 oz. (2 Pack)](https://m.media-amazon.com/images/I/41YZ3hZJfbL.jpg)**Permatex 81730 Flowable Silicone Windshield Glass Sealer 1.5 oz. (2 Pack)** Permatex**$13.42**4.4★369 reviews](https://www.amazon.com/dp/B07GFVZ77Z) [![Permatex 81158 Black Silicone Adhesive Sealant 3 oz. Tube Pack of 1](https://m.media-amazon.com/images/I/41UrLsBzcuL.jpg)**Permatex 81158 Black Silicone Adhesive Sealant 3 oz. Tube Pack of 1** Permatex**$5.79**4.6★11,710 reviews](https://www.amazon.com/dp/B000AL6WLA) [![Permatex 4-Pack Flowable Silicone Windshield & Glass Sealer 1.5 oz Clear Waterproof](https://m.media-amazon.com/images/I/513z4zAGmEL.jpg)**Permatex 4-Pack Flowable Silicone Windshield & Glass Sealer 1.5 oz Clear Waterproof** Permatex**$20.51**4.6★186 reviews](https://www.amazon.com/dp/B07Q32Z31V) [![303 Products Touchless Sealant - SiO2 Water Activated Paint & Glass Protection - Spray On Rinse Off - Lasts 2X Longer Than W- Deep Wet Shine 32 fl. oz. (30394CSR)](https://m.media-amazon.com/images/I/41LZSeluG2L.jpg)**303 Products Touchless Sealant - SiO2 Water Activated Paint & Glass Protection - Spray On Rinse Off - Lasts 2X Longer Than W- Deep Wet Shine 32 fl. oz. (30394CSR)** 303 Products**$25.83**4.6★1,872 reviews](https://www.amazon.com/dp/B07NJXYQBW) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Quality-Overall**18% *“excellent product with reasonable cost”* **Ease Of Cleaning**12% *“Cleans up pretty easy too for any mess you make”* **Efficiency**10% *“Does the job”* **Advertised Vs Actual Product**9% *“Worked as advertised”* **Ease Of Use**7% *“Easy to Use”* **Brightness/Shine/Glow**6% *“It gives shine”* **Value For Money**5% *“Best value”* **Durability**4% *“its holding up well”* **Adhesion/Stickiness**3% *“has great adhesion”* **Leak-Proof**3% *“it has not leaked since”* ### **What buyers complain about ** **Functionality-Overall**18% *“Does not work as described”* **Value For Money**9% *“An expensive WASTE”* **Ease Of Use**6% *“hard to squeeze”* **Durability**6% *“Doesn't last anywhere near 12 months”* **Quality-Overall**6% *“Poor quality product”* **Adhesion/Stickiness**5% *“GREAT ADHESIVE, BAD CONTAINER”* **Ease Of Cleaning**5% *“I didnt think it did any better of a job cleaning”* **Stain Resistance**3% *“stains on them”* **Advertised Vs Actual Product**3% *“VERY Misleading”* **Windshield Issues**3% *“most bugs that hit the windshield come off easily with the wipers”* #### **Top return reasons**- Functionality-Overall31% - Advertised Vs Actual Product17% - Value For Money7% - Compatibility-Overall6% - Leak-Proof6% - Adhesion/Stickiness5% - Size-Overall3% - Stain Resistance2% - Brightness/Shine/Glow2% - Color2%