Professional Simulated Blood is the standard washable, mouth-safe blood which has been used in the industry for many years. Soap and warm water will remove it from most fabrics (and warm water alone in most cases). This blood is for use on skin and fabric.
The new Silicone Flow Blood is also mouth-safe and washable but has extra flow properties. It will run like real blood and not bead on silicone props/appliances and direct applied effects.
This is the blood that is best suited for pumping as it will flow through tubing with minimal watering down and has more pigment so as not to lose colour intensity/opacity.
“We used Rob’s blood on Pride and Prejudice and Zombies and it was fab, doesn’t bead on silicone and a great colour!” Mark Coulier
“Best make-up blood in the world” Morten Jacobsen
“If the blood needs to flow, pros know where to go!” Steve Johnson