According to the following Telerik links, the radCheckBox being on a page with a radButton defaults the rendermode to lightweight. https://docs.telerik.com/devtools/aspnet-ajax/controls/checkbox/troubleshooting/distorted-appearance https://docs.telerik.com/devtools/aspnet-ajax/controls/checkbox/mobile-support/render-modes The appearance is indeed distorted when used this way. Changing my radbutton to lightweight changes the design and doesn't match with the overall them of the site. To get the design I wanted, I used an asp:Checkbox instead of a radCheckBox. I'd like to request the radCheckBox and the other controls mentioned in the links to be able to be rendered in more than just lightweight. If radCheckBox is the only one we can get, that's fine as I'm not sure if I would need the other ones. The attached picture shows the issue. Thank you.