Yes, the Oracal 631 material is self-adhesive. The pressure sensitive adhesive is designed to be removable but you will need to ensure that you clean the surface of the wall or substrate intended for the decal before you attempt the application. Even a light amount of dust or debris and cause the adhesive to fail. The best transfer tape for 631 vinyl is going to be Oracal HT55 Application Tape, You can find this product at the link below: 


Oracal HT55