SHUFILL CUSHION Medium A50 Is a shock absorbing urethane pad material with a setting time of 35 seconds often used for sport horses. It can be used with pad or mesh. However it is advisable to use a mesh for the best result. SET TIME: At room temperature about 60 seconds. At cold conditions about 90 seconds and in very hot condition about 30 seconds. In general temperature and humidity can influence the performance of any 2 component product.