GOOP is a tried and tested formula, having been successfully used in many different applications for over 20 years, it will carry on working no matter how many punctures you may experience. GOOP is installed into the tyre or tube through the valve stem BEFORE you have a puncture, and will seal as many punctures as may occur.
   GOOP  works in BOTH tubed and tubeless tyres and will last for the lifetime of the tyre or tube and simply washes away with water & does not leave a sticky residue behind when a new tyre or tube is fitted.
(Note: Does NOT contain Latex, which requires a solvent to remove from the rim) GOOP is suitable for use in pretty much any air filled tyre and a Schrader (screw in type) valve. 
 
GOOP is an Aqueous Glycol solution ( Non toxic ) suitable for tubed or tubeless tyres, containing finely cut rubber particles, preservatives, binders, suspension agents and anti corrosive inhibitors, all perfectly harmless to tyres or tubes, or the wheel rim, GOOP will not freeze and remains stable even at high temperatures.   
 
It is not a foam or gel that you put in once you have a puncture.

Permanently seals punctures caused by objects up to 6mm in diameter, reduces porosity in the tyre thus reducing under inflation and excessive heat build up.

 
So, in summary:
Goop is installed through the valve BEFORE you have a puncture (Suitable for use with all Schrader type valves) and is supplied with valve removal tool in the cap
It is suitable for use in BOTH tubed and tubeless tyres . It will seal as many punctures that you may incur, can also stop air loss from leaking rims and  will last for the life of the tyre or tube
Goop will simply wash away with water when the time comes to change the tyre, leaves no sticky residue
 
Ecologically friendly and made in the UK