Quote from the site description: 【Heat Resistant & Waterproof】The tile stickers are made of composite PVC, which is heat-resistant and safe to use even in kitchens where fire is a concern. The heat resistance temperature is 120°C. They are also waterproof and stain-resistant, with a smooth, glossy surface that can be easily cleaned with a wet towel. 【SGS Certified】We have added certification documents to our product page, which have been tested for formaldehyde, heavy metals, and antibacterial properties through the SGS organization, so customers can purchase with confidence. 【3 Times Thicker Than Commercial Products】Our product is three times thicker than commercially available products, making it more durable and less prone to wrinkles. It saves time and cost compared to replacing tiles directly, making it cost-effective. 【DIY Friendly】Available in various sizes and specifications, you can cut them with scissors and stick them wherever you like. They are commonly used on walls in kitchens, toilets, washbasins, and bathrooms, and can also be applied to tables, smartphone cases, mirrors, refrigerators, and more. 【Maintenance Method】Dust and dirt can be wiped off with a wet tissue. Kitchen stickers can be wiped with a cloth and detergent. Thank you for viewing.