Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to remove adhesive from concrete [title] Decide on an adhesive remover to use. [step] There are many types of removers that you can choose. You can find user-friendly and safe types of adhesive removers made with citric acid or soy bases.

Ending1: Many of these products have a somewhat strict confidentiality and do not tell you how to use them. [substeps] Research traditional chemical-based adhesive removers that are always available. Ending2: However, for adhesives that are difficult to remove, you will need to use a solvent-based adhesive. [title] Apply the adhesive remover to the adhesive with a brush or trowel. Ending3: [substeps] Citric acid is liquid acids that find the surface of concrete, and can work well as a stripper. Soy bases are stones containing both urea and nitric acid, and will be removed with a special chemical stripper. Ending4: Some may also contain agents that will remove dressings or other adhesives, but most will not set in concrete very well. [substeps] Protect your concrete surfaces by priming or sanding old concrete.

Answer format: ending1/ending2/ending3/ending4