Our Technologies
Convexity Ostomy
A guide to convexity and why you might consider a convexity ostomy products
;
Understanding convexity: Support for a more secure seal
Convexity is the outward curve built into some ostomy skin barriers (wafers). It applies gentle pressure around the stoma to help improve the fit and reduce leakage, supporting a more secure seal between the barrier and the skin.
Why consider a Convatec convex solution?2
Your stoma may be protruding above the skin surface, flush with the skin surface or retracted below the skin surface. Convex products help the stoma protrude further into the pouch.
What is convexity?
Convexity is the outward curving of the wafer or skin barrier
The curved shape provides gentle pressure around the stoma to improve contact with the skin and help maintain a secure seal.1
Because every body is different, convex systems can support a wide range of stoma profiles by helping maintain a reliable seal.
How convexity pouch systems work with a flush or retracted stoma¹
 |
 |
 |
1.Position theskin barrier above a flushstoma. This also works with retracted stomas or with skin folds. |
2.The convex skin barrier exerts downwards pressure on the skin. |
3.The pressure on the peristomal skin will help the stoma protrude further into the pouch, allowing for a better seal and helping to. |
Our new one-piece ostomy system with Leak Defense™ combines our goldstandard
adhesives with a comprehensive soft convexity range, designed to
adapt to the body for a secure, longer-lasting seal.
- Available in 2 depths and 4 tension locations to help you find the
optimal convex option. - As pioneers in hydrocolloids, our adhesives were created to help
users get it right the first time, every time. - Designed for flush or retracted stomas, or with an abdomen that has
folds or loose skin.
Featured Convex Products
Esteem Body™ Soft Convex One-Piece Drainable Pouch - with window
Esteem synergy® Adhesive Coupling Technology™ Convex Moldable Durahesive® Skin Barrier
SUR-FIT Natura® Two-Piece Durahesive® Skin Barrier with CONVEX-IT® Technology
New from Convatec
Learn more about convexity and request product samples today.
1. Colwell J, Stoia Davis J, Emodi K, Fellows J, Mahoney M, McDade B, Porten S, Raskin E, Sims T, Norman H, Kelly M, Gray, M. Use of a Convex Pouching System in the Postoperative Period: A National Consensus. Journal of Wound, Ostomy, and Continence Nursing. 2022;49(3):240-246.
2. McNichol L, Cobb T, Depaifve Y, Quigley M, Smitka K, Gray, M. Characteristics of Convex Skin Barriers and Clinical Application: Results of an International Consensus Panel. J Wound Ostomy Continence Nurs. 2021;48(6):524-532.
3. Carmel J, Colwell J, Goldberg M, eds. Wound, Ostomy, and Continence Nurses Society Core Curriculum Ostomy Management. 2nd ed. Philadelphia: Wolters Kluwer; 2022. 2. Redmond C, Cowin C, Parkter T. The experience of faecal leakage among ileostomists. Br J Nurs. 2009 Sep 24-Oct7;18(17):S12-7.doi: 10.12968/bjon.2009.18.Sub6.44170. PMID: 19797994. © 2025 Convatec Inc. TM and R are trademarks of the Convatec group of companies. Convatec me+ is a trademark of Convatec. AP-77253-USA-ENGUv1