---
product_id: 495171085
title: "Ks-Tek 20 mm Crimp Cap with Natural PTFE/Blue Silicone Septa (Silver) 100pk"
brand: "ks-tek"
price: "$U3628"
currency: UYU
in_stock: true
reviews_count: 4
category: "Ks Tek"
url: https://www.desertcart.uy/products/495171085-ks-tek-20-mm-crimp-cap-with-natural-ptfe-blue
store_origin: UY
region: Uruguay
---

# Temp resistant -60 to 260°C 20mm aluminum 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:** $U3628
**Availability:** ✅ In Stock

## Summary

> 🔬 Seal your samples like a pro — no leaks, no limits!

## 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?** $U3628 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/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 cap with 10mm center hole ensures secure, leak-proof closure
- • **Thermal Toughness:** Withstands extreme temps from -60°C to 260°C without compromise
- • **Self-Healing Septa:** Blue silicone layer instantly reseals after needle puncture for repeated use
- • **Premium Build Quality:** Thickened aluminum cap paired with non-toxic PTFE/silicone septa for durability
- • **Chemical-Resistant Seal:** PTFE layer resists acids, alkalis & oxidants for pure sample integrity

## Overview

The Ks-Tek 20 mm Crimp Cap features a 3.25mm thick PTFE membrane laminated with a blue silicone septa, combining chemical inertness and elasticity for a reliable, self-healing seal. Crafted from thickened aluminum, it fits vials with a 20mm diameter and 10mm center hole, and withstands temperatures from -60°C to 260°C, making it ideal for demanding scientific applications requiring spill-proof, reusable vial closures.

## 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 | 4.4 4.4 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

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-20*