The materials they send you with are heavy duty and high quality! They even cut the pieces they send a little bit bigger than what you ordered so if you need the exact length or width you can trim it down to that size. My only complaint is that I don’t believe there’s any video instructions as I looked around and wasn’t able to find much on the installation process, just lots of information on product specs.*To the manufactures: if you’re reading this you have a great product that makes roof repairs or new roof installations very accessible to the common person that is not well versed in construction. That being said people don’t know what they don’t know. What may seem like a straight forward process to those in the trades is a mystery to those who’ve never swung a hammer. Creating a simple 1-2 page instruction manual with some FAQ’s and do’s and don’ts would make you guys look like rockstars. Instead of having to look through the questions on Amazon or calling customer service to try and find answers it would be nice if the instructions came with the product.For what it’s worth from a random guy on the internet, these are the 5 questions I’d like to see answered or addressed in a future instruction manual:1.) For repairing existing pvc roofs systems does the patch go above or below the existing roof?2.) What materials will this stick to? Will it stick to Wood, foam board, shingles, old pvc roof membrane, cement, cinder blocks, steel, tin, vinyl etc?3.) Is the product installed and secured using only the adhesives and tape provided or is a hot air gun needed for heat welding the pvc for patches and installation?4.) what tools, products, machinery will be needed to complete the installation or roof patch? Do customers need to buy a hot air pvc welder, seam roller, blow torch, etc to successfully install your product?5.) what other products are or are not compatible with your product? Will your product adhere to products made by duro last roof system? Will your product adhere to TPO or EPDM products?