FREEZE WARNING: By placing an order you acknowledge that your order may freeze during its route to you. Clay that freezes is not ruined, but it does need to be wedged very well before using. Clay Coat becomes less effective if it freezes. For this reason we are temporarily only shipping Clay Coat via USPS Priority Mail. International shipments and other economy shipping services will resume in the spring. We ship all Clay Coat orders in a thermal sleeve, but freezing is still possible. Please test a small area first; if it doesn't repel water, email us and we will send a replacement.