Those are *Self-Adhesive Elastomeric Foam Insulation Tape*
You sent 2 angles of the same product:
*Product details:*
1. *Type*: Self-adhesive closed-cell elastomeric foam tape / AM Tape
2. *Color*: Dark grey / black
3. *Backing*: Self-adhesive with release liner
4. *Box label*: "SELF-ADHESIVE ELASTOMERIC" - so it’s for insulation and sealing
5. *Use*:
- Pipe insulation for AC, refrigeration, and chilled water lines
- Thermal insulation, condensation control
- Sealing gaps, vibration damping, noise reduction
- Oilfield camp AC ducts and workshop applications
*Key features*: Flexible, weather resistant, prevents condensation and heat loss. Just peel and stick.