--- product_id: 495171085 title: "Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk" brand: "ks-tek" price: "853 DH" currency: MAD in_stock: true reviews_count: 4 category: "Ks Tek" url: https://www.desertcart.ma/products/495171085-ks-tek-20-mm-crimp-cap-with-natural-ptfe-blue store_origin: MA region: Morocco --- # Temp resistant -60 to 260°C 20mm aluminum crimp cap diameter 3.25mm PTFE membrane thickness Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk **Brand:** ks-tek **Price:** 853 DH **Availability:** ✅ In Stock ## Summary > 🔬 Seal your samples like a pro — precision, protection, perfection. ## Quick Answers - **What is this?** Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk by ks-tek - **How much does it cost?** 853 DH with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/495171085-ks-tek-20-mm-crimp-cap-with-natural-ptfe-blue) ## Best For - ks-tek enthusiasts ## Why This Product - Trusted ks-tek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Fit:** 20mm diameter cap with 10mm center hole offers secure, spill-proof sealing with easy penetration. - • **Thermal Toughness:** Withstands extreme temps from -60°C to 260°C, perfect for demanding lab environments. - • **Premium Build Quality:** Thickened aluminum cap paired with laminated PTFE/silicone septa delivers durability and professional-grade performance. - • **Self-Healing Silicone:** Blue silicone septa’s elasticity guarantees reliable resealing after multiple punctures—no leaks, no fuss. - • **Chemical-Resistant Seal:** PTFE membrane ensures inertness against acids, alkalis & oxidants for uncompromised sample integrity. ## Overview Ks-Tek 20mm Crimp Caps feature a 3.25mm thick PTFE membrane laminated with blue silicone septa, housed in a durable aluminum cap. Engineered for chemical inertness and thermal resistance from -60°C to 260°C, these caps provide a secure, self-healing seal ideal for scientific sampling and spill-proof storage. ## Description Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pkThe PTFE layer of the septum is in contact with reagents, has good chemical inertness, can resist acid, alkali, temperature, and adhesion. Even at high temperatures, it does not interact with concentrated acids, alkalis or strong oxidants. At the same time, it uses the elasticity of the silicone layer to ensure the sealing performance.Size: Φ20mm. The diameter of center hole is 10mm.High Temperature resistant up to -60-260°C.PTFE membrane Thickness 3.25mmAluminum cap Thickness 0.2mm Review: I LOVE LOVE LOVE these! Makes things so much easier when capping my vials. two downsides, the chemicals used in the vials will melt silicone over time which is very unsafe. these hafe a PTFE paper type backing on the bottom of the silicone stoppers though so they shouldn't really come into contact with the oil from the vials. That said, what happens when you've used the vial multiple times and now have poked multiple holes into that ptfe bottom? Also, they don't have caps. give me a flip cap on these that remain until the vial is ready for usage. id much rather the extra protection. Aside from this, the needles feel wonderful gooing thrugh this, the self healing is no issue and immediately self heals your stab port. they feel and look nice and just well. made. I absolute love love love these. Please give us some in a much better stopper material that will still work with solvents like Benzyl Benzoate for the long term Review: Perfect replacement caps for our vials, very similar to a type and style we were already using. Creates a strong seal (with the right crimping tool). Easy to use. We are using these for scientific samples so we need them to be spill proof and they don't not leak. They can be removed when we need to refill the vials so we are very happy with this item so far. ## Features - Completely laminated with PTFE. Soft liners for easy penetration - Size of the cap: Φ20mm. The diameter of center hole is 10mm. PTFE membrane Thickness 3.25mm - Use PTFE and high-quality silicone rubber as raw materials to ensure that the septa is non-toxic. - High Temperature resistant up to -60-260°C. - The cap is made of high-quality thickening aluminum material, containing a white PTFE membrane/Blue silica gel composite septa, which has excellent performance. After sampling, it is still sealed. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08TMFNB1D | | Batteries Required? | No | | Batteries included? | No | | Customer Reviews | 4.3 4.3 out of 5 stars (9) | | Date First Available | 21 Jan. 2021 | | Item Weight | 181 g | | Item model number | KSUS-PTFECAP-BW-100M | | Manufacturer | Ks-Tek | | Material | PTFE_(Polytetrafluoroethylene), PE_(Polyethylene) | | Package Dimensions | 8.61 x 8.51 x 8.41 cm; 181 g | | Part number | KSUS-PTFECAP-BW-100M | ## Images ![Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - Image 1](https://m.media-amazon.com/images/I/61i0+JGbEBL.jpg) ![Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - Image 2](https://m.media-amazon.com/images/I/51qgtQbtdaL.jpg) ![Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - Image 3](https://m.media-amazon.com/images/I/61mfC8Dc4tL.jpg) ![Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - Image 4](https://m.media-amazon.com/images/I/61eQ+jeVMQL.jpg) ![Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - Image 5](https://m.media-amazon.com/images/I/61EZfLmaoXL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***A on 28 August 2025* I LOVE LOVE LOVE these! Makes things so much easier when capping my vials. two downsides, the chemicals used in the vials will melt silicone over time which is very unsafe. these hafe a PTFE paper type backing on the bottom of the silicone stoppers though so they shouldn't really come into contact with the oil from the vials. That said, what happens when you've used the vial multiple times and now have poked multiple holes into that ptfe bottom? Also, they don't have caps. give me a flip cap on these that remain until the vial is ready for usage. id much rather the extra protection. Aside from this, the needles feel wonderful gooing thrugh this, the self healing is no issue and immediately self heals your stab port. they feel and look nice and just well. made. I absolute love love love these. Please give us some in a much better stopper material that will still work with solvents like Benzyl Benzoate for the long term ### ⭐⭐⭐⭐⭐ Review *by M***R on 23 August 2025* Perfect replacement caps for our vials, very similar to a type and style we were already using. Creates a strong seal (with the right crimping tool). Easy to use. We are using these for scientific samples so we need them to be spill proof and they don't not leak. They can be removed when we need to refill the vials so we are very happy with this item so far. ### ⭐⭐⭐⭐ Review *by F***Y on 29 January 2022* There's times when the silicone gets stuck in the needle and must siphoned out. These still work better than the rubber ones though ## Frequently Bought Together - Ks-Tek 20mm Aluminum Crimp Seal Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk - ALWSCI 10ml Borosilicate Glass Clear Flat Bottom Headspace Vial, 20mm Crimp Top, Beveled Edge Finish for GC Headspace Analysis, Case of 100 - PEKYBIO 20 mm, Borosilicate Glass Standard Crimp Headspace Vial,20 ml Capacity,Flat Bottom,Beveled Finish,22.5x75 mm, Pack of 100 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ma/products/495171085-ks-tek-20-mm-crimp-cap-with-natural-ptfe-blue](https://www.desertcart.ma/products/495171085-ks-tek-20-mm-crimp-cap-with-natural-ptfe-blue) --- *Product available on Desertcart Morocco* *Store origin: MA* *Last updated: 2026-04-25*