Prepare the Rubber and Pattern

• 1). If you are using a stone as your stamp mold, you will need to seal the side you will be making the mold from. Follow the manufacturer's instructions regarding application, dry time and work space requirements. For non-porous stamp molds, you do not need to apply a sealant.
  
  
• 2). In a well-ventilated area, lay your stone or mold level on your work space. Use carpentry shims to lift edges to create a level surface. It is important for your mold to be level so that the rubber, in liquid form, will create a full stamp.
  
  
• 3). Mix the two part rubber in the bucket using a stick or a drill and stirring paddle. A more thoroughly mixed rubber will dry faster. You have about a 20-minute time span before the rubber will set in the bucket. Follow the manufacturer's instructions regarding work space requirements, mixing and dry times.
  
  

Creating the Stamp

• 1). Spray your mold with aerosol stamp release. This will make the surface slippery and keep the rubber from adhering to the mold.
  
  
• 2). Pour the rubber mixture onto the center of the mold, allowing the rubber to level itself out. It is better to pour several thin layers than one thick layer. The edges of the stamp will be thinner than the middle. This will help when you are overlapping the pattern when stamping.
  
  
• 3). Let the rubber set, following the manufacturer's instructions. The corners of the rubber will lift as the rubber dries; this is normal and useful when releasing the set rubber. Once the rubber has set, release it from the mold and prepare the concrete for stamping.