Vac-U-Lock Modular System Powder Lubricant. Looking for an even better strap-on experience? Look no further! This Vac-U-Lock powder is just what you need. This white talc powder is made to be used on Vac-U-Lock plugs as a way to attach and remove attachments easily and smoothly. Compatible with all Vac-U-Lock attachments and accessories. Vac-U-Lock Accessories White Powder that is used on the Vac-U-Lock plugs as a way to attach attachments easily. Compatible with Vac-U-Lock Sex System. Made using phthalate free, non-toxic materials: Talc. White. Doc Johnson Novelties the Great American Toy 2011 Catalog page 116.