Armacell AP Self-Adhesive Sheet Insulation vs Joyfolk 1" Adhesive Foam Padding Sheets

These are not really competitors. The Armacell AP is a large 36 by 48 inch elastomeric insulation sheet rated R4.2, with a 25/50 flame and smoke rating and a temperature range from about -297°F to 220°F. The Joyfolk is a four-pack of 4 by 4 inch neoprene pads for small cushioning and gap-filling jobs. Buy the Armacell for ducts, pipes, walls and any surface that needs real thermal insulation; buy the Joyfolk for small pads, vibration damping and craft or repair work.

• Choose the Armacell AP if you need a full 12-square-foot sheet of R4.2 closed-cell insulation for ducts, equipment or walls, and want a flame and smoke rated product.
• Choose the Joyfolk if you need a handful of small 1-inch neoprene pads to cushion, shim or damp vibration in tight spots.