- Prep for bolder, longer looking lashes. GrandePRIMER is a white pre-mascara lengthener and thickener formulated with nutrient-rich, no-flake mini fibers and peptides that immediately improve lash appearance and health. GrandePRIMER preps the lashes for mascara application and boosts its effects. Step 1: Coat applicator brush generously with GrandePRIMER. Step 2: Apply one to two coats of GrandePRIMER to clean lashes in an upward motion as you would mascara, base to tips. Beauty Tip: When using with GrandeMASCARA, try applying GrandePRIMER on one eye first and then immediately follow with GrandeMASCARA without moving on to the next eye. This prevents drying and makes for easy application. Primer goes on white.