How to apply High temperature Silicone and heat resistant plaster

Posted by sophiamilller on September 22nd, 2013

High temperature Silicone and heat resistant plaster are two materials that are absolutely indispensable in any situation where a house owner wants to have any kind of oven, fireplace, wood burning stove or any other contraption which generates significant levels of heat through burning processes. Both of these materials boast significant levels of heat resistance, and can properly function in most high temperature environments of a typical household. High temperature Silicone and heat resistant plaster are indispensable for all owners of wood burning stoves, fireplaces, and ovens, and will prove useful even in things like pumps and motors.

Anywhere where there’s heat those materials can be used. As a bonus, the silicone is a great adhesive, and while it’s not very practical to glue everything together using High temperature Silicone, you can boast to friends that while your model airplanes have unsightly lumps of silicone on them they will stay together during a fire, at least until the plastic melts. While both specialized Silicone and heat resistant plaster can survive high temperatures, their other properties are very different, and so is their range of application. Heat resistant plaster is usually used in place of simple plaster when high temperature is expected, while High temperature Silicone serves as an adhesive or a protecting coating for hot environments. Not surprisingly, they are also applied in different ways.

High temperature Silicone is very easy to apply. It typically comes in a package with a nozzle. What you have to do is cut off a bit of a nozzle (don’t cut it to close to the tube itself or you won’t be able to achieve a careful thin line) and deposit the High temperature Silicone in one smooth movement.

Heat resistant plaster requires more time and effort to apply properly. First, if the place you want to apply heat resistant plaster to has any old plaster or render, remove it. Second, you have to re-render the area you want to be treated with resistant plaster. You can’t use just any render, instead a special fireplace render has to be applied. After you apply the render, let it dry completely. It’s very important to do so, or the plaster won’t adhere to the render properly, and you will have to redo the whole job. To make sure the render is completely dry, leave it for a few days, ideally in a heated, dry environment. After the render is dry, coat it with the adhesive sealer.

The wall is ready to be coated with the plaster, but first you must prepare it. Mix the plaster with cold tap water (typically 200ml per kg of plaster) to a proper consistency in a bucket it was supplied in using a plaster mixer or a drill attachment. Make sure there are no traces of old cement or other material on the tools you use to mix the plaster. The plaster is ready to apply. The plaster coating should be 3-6mm thick, and with no featheredges. A 20kg bucket of plaster is typically enough to cover two square meters of wall.

If you need to coat a surface to be heat resistant, heat resistant plaster is very easy to apply yourself. Alternatively, High temperature Silicone can be used for heat resistant coating or adhesion.