Henry | sku: 100564959 Henry 554 Level Pro 1 Qt. Underlayment Primer Henry Level Pro 554 1/4 Gal. Underlayment Primer helps improve bonds while preventing pinholes and bubbles on the surface. Easily prepares surfaces for self-leveling. The required primer for use with Henry 555 underlayment.Dries in 3 hoursCovers up to... Log in for pricing