Michaels Seals is a manufacturer of coffee, jar and blender seals. We use only the best quality rubber sourced from Australian manufacturers and adheres to strict quality control guidelines to ensure our seals are long lasting, hygenic and durable.

We are located in Victoria and are 100% Australian Owned and our products are 100% Australian made.

About the type of rubber we use.

Silicone rubber is a rubber-like  material composed of silicone — itself a polymer — containing silicon together with carbon, hydrogen, and oxygen. During manufacture heat is required to vulcanize  (set or cure) the silicone into its rubber-like form. This is normally carried out in a two stage process at the point of manufacture into the desired shape, and then in a prolonged post-cure process. It can also be injection molded.

Silicone rubber is generally non-reactive, stable, and resistant to extreme environments and temperatures from -55°C to +300°C while still maintaining its useful properties. Due to these properties and its ease of manufacturing and shaping, silicone rubber can be found in a wide variety of products, including: automotive applications; cooking, baking, and food storage products; apparel such as undergarments, sportswear, and footwear; electronics; medical devices and implants; and in home repair and hardware.

Nitrile rubber, or Buna-N, is a synthetic rubber copolymer  of acrylonitrile (ACN) and butadiene. Some trade names are: Nipol, Krynac  and Europrene.

Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene). Although its physical and chemical properties vary depending on the polymer’s composition of nitrile (the more nitrile within the polymer, the higher the resistance to oils but the lower the flexibility of the material), this form of synthetic rubber is generally resistant to oil, fuel, and other chemicals. Its resilience makes NBR a useful material for disposable lab, cleaning, and examination gloves. It is used in the automotive industry to make fuel and oil handling hoses, seals, and grommets.

NBR’s ability to withstand a range of temperatures from −40 °C to +108 °C makes it an ideal material for extreme automotive applications. Nitrile butadiene is also used to create moulded goods, footwear, adhesives, sealants, sponge, expanded foams, and floor mats. Nitrile rubber is more resistant than natural rubber to oils and acids, but has inferior strength and flexibility. Nitrile gloves are nonetheless three times more puncture-resistant than rubber gloves[1]. Nitrile rubber is generally resistant to aliphatic hydrocarbons. Nitrile, like natural rubber, can be attacked by ozone, aromatic hydrocarbons, ketones, esters and aldehydes.