Our silicone products come with a one-year shelf life warranty from Powerup Silicone Sealant. Batch numbers, which specify the production date, are used to keep track of this. Powerup Sealant also assures a 5 year lifespan after curing.
Before beginning a job, test the sealant by applying a small dosage of sealantto a scrap piece of plasticor other suitable material. If the substance does not"skin" after around 15-20 minutes, it is most likely expired and will not fully cure.
If the silicone in the tube has hardened (cured), it cannot be used and has most certainly reached the end of its shelf life. If you have reason to suspect the product hasn't expired, return it to the store where you bought it or contact us immediately.