Galvalume Color Steel Portable Electric Type Lamina Kr18 Standing Seam Roll Forming Machine In Stock Our KR-18 crimped sheet profile is rolled on portable equipment and manufactured from 610mm steel strip in various gauges and finishes. If manufactured on-site, KR-18 sheets can be rolled to the length of the slope, as long as it does not exceed 70 m. This significantly reduces maintenance costs and guarantees a waterproof roof. The KR-18 crimped sheet can be used on low-slope