Methylcellulose K4M - WillPowder from Chef Will Goldfarb, 1lb Willpowder Sale! from 2800 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. For Gluten Free Baking - K4M is a medium viscosity K grade hydroxypropyl methylcellulose. BULK ORDERS: For orders over 30 units please call us to place order.