10 Best Under Grill Mat For Composite Deck 2026 in the United States

This extra-large under grill mat measures 100 by 39 inches, making it a great fit for households with multiple or larger grills, providing ample coverage to protect your composite deck from sparks, grease, and food spills. It is made from durable fiberglass with a special heat-resistant coating on both sides, which can withstand temperatures up to 2000°F. This level of heat resistance helps prevent damage from flying embers and hot grease, which is important for protecting sensitive deck surfaces.

The mat also features a non-slip, waterproof silicone coating that repels oil, water, and stains, making cleanup simple—just hose it off or wipe with a damp cloth. Its foldable and portable design allows for easy storage and reuse, and it can be used in various outdoor fire settings beyond grills, like fire pits and fireplaces. However, to maintain its durability, direct contact with flames should be avoided. Although it’s lightweight and easy to handle, the mat's large size and thinness mean careful placement is needed to ensure full coverage under the grill.

The product has strong customer reviews and ranks well among grill pads, reflecting user satisfaction. This mat makes an excellent choice for anyone wanting a reliable, easy-to-maintain protective layer for their composite deck area beneath an outdoor grill.

The UBeesize Large 65 x 48 inches Under Grill Mat is designed to protect composite decks and patios from damage caused by outdoor grilling. Made from fiberglass with a double-sided silicone coating, this mat offers impressive heat resistance up to 2000 degrees Fahrenheit. It is also fireproof, waterproof, and resistant to oil, ensuring that it can handle the messy aftermath of a barbecue.

The product’s large size provides ample coverage, making it suitable for various outdoor areas including gardens and patios. Its non-slip backing ensures it stays in place during use. Additionally, the mat’s waterproof nature makes it easy to clean with just soap and water or a garden hose, and it can be folded for convenient storage. It comes with a storage bag, adding to its practicality.

The mat is highly durable and has undergone extensive quality checks, but at a weight of 2.27 pounds, it is lightweight and could be susceptible to strong winds if not secured properly. This under grill mat is a solid choice for those looking to safeguard their decks and patios while enjoying outdoor cooking.

The UBeesize Thickened Under Grill Mat is a robust option for those using grills or fire pits on composite decks. Its substantial size of 60x36 inches provides ample coverage for protecting surfaces from potential damage caused by heat or embers. Made from fiberglass with a double-sided thickened silicone coating, this mat offers impressive heat resistance, up to 2000 degrees Fahrenheit. This feature makes it highly effective for preventing heat-related damage to decks and patios, which is essential for maintaining the integrity of composite materials.

The product is designed for ease of use, with a non-slip backing that ensures it stays in place during use. Its waterproof nature facilitates cleaning; simply rinse with water or wipe with a damp cloth, making post-barbecue clean-up straightforward. Additionally, the mat's ability to be folded for storage adds to its convenience, especially when space is limited.

One of the mat's strengths is its durability, a result of its advanced materials and construction. However, while the fiberglass and silicone coating provide high heat resistance and longevity, the mat's effectiveness in extremely windy conditions might be less than ideal due to its lightweight nature (1.9 pounds). Users should consider securing it during such weather to prevent displacement. In terms of weather resistance, the mat performs well, but prolonged exposure to harsh elements might eventually affect its longevity, so occasional checks and maintenance could be beneficial.