Black Jack Silicone Roof Sealant is a white rubber sealant that provides the ultimate waterproofing protection from the elements. This product has exceptional adhesion and flexibility and is compatible with most building materials. Ideal for roof repairs, or on new installations of skylights, windows, doors or vents.
The object is to have a hand with a total value higher than the dealer's without going over 21. Kings, Queens, Jacks and Tens are worth a value of 10. An Ace has the value of 1 or 11. The remaining cards are counted at face value.