product guide

UnderSense® 3-in-1 Maximizing Lash Primer — visible, buildable mascara base

UnderSense® 3-in-1 Maximizing Lash Primer makes lashes look fuller, longer, and more defined the moment mascara goes over it.

updated 2026-09-19 · product guide

Product details

The immediate look of volume, length, and definition; visible placement; smooth buildability; mascara adhesion and longer wear; and conditioning

UnderSense® 3-in-1 Maximizing Lash Primer

UnderSense® 3-in-1 Maximizing Lash Primer is the base that goes on before mascara.

Current context: apply to top and bottom lashes, add coats as desired, allow the primer to fully dry, then finish with LashSense mascara

References and current sources

where it fits

what it means for you

It goes on in a light beige you can actually see, so every coat lands where you meant it to, and gives mascara something to hold to — which keeps color looking fresh longer. Jojoba Esters condition and nourish the lashes, while the primer's own soft-wax film stays flexible enough to build coat on coat. Peptides run through the rest of the formula: Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3 with Trifolium Pratense (Clover) Flower Extract and Oligopeptide-10, alongside Vigna Radiata (Mung Bean) Seed Extract. Let it dry fully, then take LashSense mascara over the top.