Goldwell Sleek Perfection Thermal Spray Serum Sale! from 1600 /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. Goldwell Sleek Perfection Thermal Spray Serum Fine Mist, Waterless Spray, Speeds Up Straightening, Humidity Resistant, Heat Protection, Color Protection Tweet