Which Cosmetics Need Sealing? A Quality Protection Guide from Cosmetic OEM Factories
OEM Factory Explains Seal-Required Cosmetics (Mascara, Transfer-Proof Lip Gloss) & Sealing Tech
2025-10-11
In daily use, many people have encountered mascara, transfer-proof lip gloss or lipstick drying out and clumping after being stored for a while. This issue is often closely related to "inadequate sealing". As an OEM factory focusing on high-quality cosmetic production, we accurately determine whether sealing is needed based on product characteristics during R&D and manufacturing. Through professional sealing technology, we lock in ingredient activity, slow down deterioration, and fundamentally prevent problems like cosmetics drying out, ensuring an optimal user experience.
I. These Cosmetics Must Be Properly Sealed
Not all cosmetics require complex sealing designs, but the following types have an urgent need for sealing due to their ingredient and texture properties—they are also key focuses in our OEM factory production:
(I) Mascara: Sealing is Key to Combating "Dryness and Clumping"
Mascara is one of the cosmetics most prone to deterioration from insufficient sealing. Its formula contains a large amount of film-forming agents, fiber components and volatile moisturizing oils. Once the seal is loose, air intrusion accelerates the evaporation of moisture and oils, leading to dry, clumpy formula that is not only hard to apply but may also pull on lashes. During mascara production, we enhance sealing in two ways: first, adopting a "double-layer screw cap sealing structure" with an inner silicone gasket that fits tightly around the tube opening to block air; second, optimizing the brush design to reduce air intake when the brush is removed, while adding "antioxidant stabilizers" to the formula to further slow dryness when combined with sealing. For example, the lengthening mascara we customized for brands can have its post-opening lifespan extended to over 6 months with this sealing solution, preventing users from frequently facing the issue of "drying out after a few uses".
(II) Transfer-Proof Lip Gloss/Lip Glaze: Sealing Preserves "Long-Lasting Film-Forming" and "Hydrating Texture"
The core advantages of transfer-proof lip gloss and lip glaze are "long-lasting adhesion" and "high pigmentation", which rely on their special film-forming formula—containing polymer film-forming resins and volatile solvents. Poor sealing causes solvents to evaporate quickly, making the lip gloss thicker, accelerating abnormal film formation, and leading to patchy, cakey application or even loss of transfer-proof properties. Our OEM factory’s solution is "vacuum pump sealing packaging": on one hand, the vacuum bottle isolates air and external contamination to prevent solvent evaporation; on the other hand, the pump dispenser accurately controls the amount used, reducing the number of times the formula inside the bottle comes into contact with air. Additionally, we adjust the solvent ratio in the formula to work with the sealing technology, ensuring the lip gloss maintains a smooth texture for 3-4 months after opening without losing its transfer-proof effect due to sealing issues.
(III) Watery Foundation/Primes: Sealing Prevents "Oxidation Darkening" and "Ingredient Separation"
Liquid base products like watery foundation and primers contain a large amount of moisture, moisturizing essence and pigment particles. Insufficient sealing leads to two major problems: first, air intrusion causes ingredient oxidation and pigment darkening, making the foundation appear "grayish" when applied; second, moisture evaporation leads to separation of oil and water phases in the formula, requiring repeated shaking before use, which affects makeup uniformity. During production of these products, we use a combined sealing method of "pump dispenser + inner sealing film": before opening, the bottle mouth is covered with an aluminum foil sealing film to ensure absolute sealing during transportation and storage; after opening, the pump dispenser rebounds automatically after each use to reduce air suction. Furthermore, we add antioxidant ingredients like "vitamin E derivatives" to work with the sealing technology, keeping the foundation’s color and texture stable even after opening.
(IV) Creamy Eyeshadow/Blush: Sealing Avoids "Cracking and Powder Loss"
Creamy eyeshadows and blushes have a texture between liquid and solid, containing wax and oil components. Insufficient sealing causes surface oils to evaporate gradually, leading to product cracking, powder loss, and "pilling" during application. During production, we equip these products with "magnetic sealing lids" that attach tightly to the edge of the compact when closed, creating a sealed space; meanwhile, we coat the surface of the cream with a "transparent protective oil film" to reduce oil loss when combined with sealing. For example, the creamy eyeshadow we customized maintains a smooth, soft texture even when left on a vanity for a long time with this sealing design, preventing users from facing the problem of "cracking shortly after purchase".
II. OEM Factory Sealing Technology: More Than "Leak-Proofing", It’s "Quality Protection"
For our cosmetic OEM factory, "sealing treatment" is far more than just "tightening a lid"—it’s a complete system combining packaging design, formula optimization and production processes, with every step aimed at protecting the high quality of cosmetics:
(I) Packaging Materials: Choosing "Anti-Permeable, High-Stability" Sealing Carriers
We select suitable sealing packaging materials based on cosmetic characteristics: for liquid cosmetics (such as mascara and lip glaze), we prioritize food-grade PETG bottles with silicone gaskets—these materials have strong anti-permeability and do not react with solvents in the formula; for creamy cosmetics, we use ABS cases with magnetic structures, which balance hardness and sealing while preventing metal oxidation from affecting the product.
(II) Production Process: "Aseptic Filling + Instant Sealing" to Reduce Contamination from the Source
In the production process, we complete cosmetic filling in an aseptic workshop, and immediately seal the filled products—such as assembling silicone gaskets for mascara and pressing vacuum bottles for lip glaze. This prevents the products from coming into contact with air and impurities during production, laying a "sealing foundation" for subsequent storage and use.
(III) Formula Synergy: "Two-Way Collaboration" Between Sealing and Ingredients to Extend Product Lifespan
Sealing technology must complement the formula. During R&D, we adjust ingredients based on the sealing solution: for example, adding "high-moisturizing oils" to mascara in sealed packaging to reduce reliance on sealing; lowering the proportion of volatile solvents in lip gloss in vacuum packaging to further slow texture changes when combined with sealing. This "packaging + formula" synergy ensures cosmetics maintain stable quality after opening under sealing protection.
III. Sealing Usage Recommendations for Brands and Consumers
As an OEM factory, we not only ensure proper sealing during production but also hope to convey correct sealing usage knowledge to brands and consumers, maximizing the service life of cosmetics:
For brands: When collaborating with us to customize cosmetics, you can proactively propose sealing requirements based on product types (such as mascara and lip glaze). We will provide the most suitable sealing solutions based on market feedback and technical advantages, while adding "sealed storage instructions" to product packaging to guide consumers in proper use.
For consumers: When using cosmetics that require sealing, close the lid immediately after each use to avoid leaving it open for a long time; avoid twisting the mascara brush repeatedly when inserting it to reduce air intake; ensure the pump dispenser of transfer-proof lip gloss resets after use. These details, combined with the factory’s sealing design, further prevent cosmetics from drying out and deteriorating.
In conclusion, the answer to "which cosmetics need sealing" lies in the product’s ingredients and texture, and professional sealing treatment is the "invisible guardian" of high-quality cosmetics. As a cosmetic OEM factory, we integrate sealing technology into the entire production process—from mascara to transfer-proof lip gloss, from packaging design to formula optimization—using details to protect the quality of every cosmetic product, so consumers no longer have to worry about "drying out over time".
recommended for you
no data
Get in touch with us
Produce high quality cosmetics in line with international standards for many well-known brands at home and abroad.
Contact: Mr. Zhang
Tel: +86 13695223393
Email: dovsdahai@gmail.com
WhatsApp: +86 13695223393
Company Address: Building F8, 54, Zone D, Industrial Park, Foshan, Guangdong, China
Copyright © 2025 DOVS | Sitemap| Privacy Policy