COZURU Natural Trapezoid Dual Forms - C19

Q: How do I find the right dual form size for my nails?
A: Choose a form that spans comfortably from sidewall to sidewall without pinching your nail bed. If you are between sizes, always size up: the extra space accommodates your gel without flattening your natural arch. With 14 distinct sizes (0–13), C19 fits virtually every natural nail bed.

Q: What is a Natural Trapezoid shape, and how does it compare to square or almond?
A: The Natural Trapezoid shape features straight, softly tapered sidewalls leading to a clean, flat free edge—similar to a subtle ballerina or coffin silhouette. Unlike straight square forms, it tapers gently toward the tip for a more slimming, elegant contour on the fingers.

Q: Are these dual forms reusable, and how do I clean them?
A: Yes, they are 100% reusable. After curing and popping off the form, wipe away any remaining gel residue or dust inside and out with a lint-free wipe soaked in 70%+ isopropyl alcohol. Let them air-dry and return them to the storage box for your next set.

Q: What types of nail extension gels can I use with C19 Dual Forms?
A: They are fully compatible with polygel, acrygel, builder gel in a bottle or pot (such as COZURU Clear Builder Gel), and acrylic systems. The crystal-clear material ensures complete UV/LED light penetration for a thorough, even cure.

Q: How do I prevent gel from squeezing out around my cuticles and underside?
A: Apply the gel thinner near the cuticle edge and concentrate the bulk in the center apex. Place the form at a 45-degree angle near the cuticle and slowly press forward toward the tip so air escapes cleanly. Before curing, flip the finger over and smooth out any underside overflow with a brush dampened in slip solution or alcohol.

Q: Why do my sidewalls crack or end up too thin after filing?
A: This occurs if product is pressed out along the sides during application. When spreading gel inside the mold, maintain even thickness along both lateral edges. The molded calibration lines on C19 help you monitor gel distribution to build strong sidewalls and a balanced apex arch.

Q: How do I remove the dual form after curing without damaging the extension?
A: Once fully cured, do not pry from the cuticle end. C19 features a built-in circular handle tab at the tip: simply pinch and gently wiggle the tab from side to side. The seal will release with an easy click, leaving behind a smooth, high-shine surface.

Q: Is C19 Natural Trapezoid beginner-friendly? Does it require heavy shaping?
A: Yes, it is very beginner-friendly. C19 is pre-molded with a balanced apex curve and crisp trapezoid taper, eliminating 90% of manual sculpting and bulk filing. After popping off the mold, simply refine the free edge and smooth the cuticle transition before applying your top coat.