Those are *SBS Modified Bitumen Waterproofing Membrane Rolls*
*Product details:*
1. *Type*: Torch-on / APP-SBS Bitumen Membrane
2. *Thickness*: 3mm - green label clearly marked "3 mm"
3. *Finish*: Mineral/sand surface with grid pattern backing
4. *Roll size*: Standard is usually 1m x 10m per roll
5. *Features*:
- Flexible, UV resistant, waterproof
- Reinforced with polyester or fiberglass mat
- Applied with torch or self-adhesive
6. *Use*: Roof waterproofing, foundations, basements, bathrooms, oil tanks, and civil construction. Very common for camp buildings and workshops.