When sealants are used between substrates or surfaces having different thermal coefficients of expansion or differing elongation under stress, they need to have adequate flexibility and elongation movement capability.
Sealants generally contain inert filler material and are usually formulated with an elastomeric to give the required flexibility and elongation. Sealants usually have a paste consistency to allow filling of gaps between substrates. These sealant pastes normally cure RTV-room temperature vulcanization to form a durable and tough rubbery seal.
Low shrinkage after application is often required. Durability, good weather resistance as well as UV and ozone resistance is also required in most cases. There is also a certified Fire Protect range available. Selecting the correct sealant is as critical as the preparation and application process to the success of the job on hand. To subscribe email subscriptions creamermedia. Engineering News is a product of Creamer Media. Advertising on Engineering News is an effective way to build and consolidate a company's profile among clients and prospective clients.
Email advertising creamermedia. Menu Menu Search By. Though some sealants and adhesive may be used in similar circumstances, they are never used the same thing. The two are very different indeed. When it comes to see once these products are mainly used as a finisher.
Naturally, as its name suggests, it seals spaces that exist between one surface to the next. When a sealant is used the space becomes air and water tight. Adhesives on the other hand are primarily used to bind services together. Although adhesive are not meant to create this air and water tight condition it sometimes dies depending on the materials that it is binding together and of course their sizes.
Sometimes adhesive is also serve as a substitute for sealants when they are unavailable at the time. Whilst sealants are not the same as adhesives, some do possess adhesives properties.
Similarly, many adhesives technologies can be formulated into sealants. Adhesives and sealants are both commonly available as polyurethanes , methacrylates , epoxies , cyanoacrylates, silicones and silane-modified polymers. Although adhesives and sealants are often discussed under the same category of material, they do have crucial differences which make them fit for different purposes. A few of these differences are explained below:. There are various factors to consider before deciding whether to use an adhesive or a sealant.
These factors can be thought of as questions, such as:. If you have any questions or want to find out more about the possibilities for your industrial application, please complete the contact form and one of our experts will be in touch. If you have a problem with industrial adhesives, sealants, or electronic protection products and require advice, you can contact our technical support service.
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