Self-adhering modified bitumen: rubberized asphalt on polyethylene or cross-laminated film. Thickness: 40-60 mil. Peel strength: >5 lb/in (ASTM D903). Nail sealability: self-seals around fastener penetrations. Uses: below-grade waterproofing (ASTM D4397), ice/water shield underlayment (ASTM D1970), air barrier, window flashing. Application: prime substrate, apply above 40°F, roll for adhesion. Lap 6 in minimum. Below-grade: install on exterior of foundation wall, protection board over membrane. Cost: $0.50-$2.00/sf. Brands: Grace Ice & Water Shield, Protecto Wrap, Carlisle WIP. CSI 07 13 00 (sheet waterproofing). Shelf life: 6-12 months. Cannot be left exposed to UV more than 30-60 days.