The Harris 102012008 roller sleeves have been specifically designed and engineered to give you seriously good results when painting semi-smooth surfaces with emulsion paint and when painting large un-even surfaces such as old plaster walls with emulsion paints. \n \nFor best results, rinse roller sleeve before use to remove any loose fibres. After use with water based paints, such as emulsion, remove the excess paint with a multi-tool. Then wash in warm soapy water. Use the multi-tool to scrape over the surface of the roller to ensure all paint is removed. Allow to dry standing up.