Check the listing for details. Bohning String Shield Silicone Wax. Condition: New with tags. Listed at 12.75 USD. Bohning String Shield Silicone Wax Unlike firm waxes that use finger friction to soften and absorb into the string fibers, String Shield is a silicone based liquid wax that instantly penetrates the bowsting with no heat necessary. The sponge applicator is clean and easy, and the String Shield formula reduces string friction while enhancing tired string colors. The odorless and waterproof wax leaves a like-new feel to the bowstring. WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.