For the following substrates (base material): Swelling and peeling may occur after installation. Rough surfaces (foam, wood, concrete, mortar, corrugated substrates, fabric, etc.), base material that generates gas (polycarbonate, solvent type putty, etc.); Contains free ingredients (tarpaulin, soft vinyl chloride, etc.); Substrates that are difficult to obtain adhesion (polyethylene, polypropylene, silicone, fluorine processed objects), Please avoid adhesion as possible. If you stick it with water, it is easy to peel off for several days, so please give sufficient curing. Underground treatment: Remove dust and debris. Please clean oil with alcohol, silicone off, or detergent. If there is any previous glue left behind, please use a scraper or something to remove it and make it smooth. Allow the base to dry thoroughly.