Rigidizer is a compound of colloidal silica.
It is used to coat ceramic fiber products to provide protection from erosion and to harden the surface to a certain degree.
It even can be used to saturate a ceramic fiber blanket, so it can be hardened into a desired shape.
Any surfaces that is coated must first be free from all oil and grease for the coating to work right.
Apply the liquid through your preferred method.
If you are spraying it though, make sure you are in a well-ventilated area and that you use a mask to prevent inhaling any into your lungs.
Allow the application of this solution to air dry for approximately one day.
This is when it will harden the surface to which it is applied.
Heat can be used to speed up this curing process, when necessary.
Once this curing process is complete, the surface of the ceramic product will be hardened without the inside being completely hardened.
One gallon of the solution will treat about 35 square feet of area, if applied with a brush and double the area, when it is sprayed.
This will help you figure out how much of this product you need on hand for your projects.
This product is ideal for making molds for your fused glass products.
You can use in the ceramic fiber fabric or board and create any shape of mold you desire.
Many times, if you just depend on pre-made molds, you limit yourself to how creative you can get with projects.
You will need to add a coating of kiln wash on your mold treated with the product just like with other molds.
Otherwise, your glass could stick to the mold.
Apply the wash liberally and allow it to dry before firing your project.
If you use the fabric to make a mold, it could add texture to your glass piece.
The mold can be sanded with 100-grit sandpaper once it is dry then add rigidizer once again along with added the powder left from sanding to fill the holes.
Allow it to dry once again.
Now, apply kiln wash.
If you have never explored making your own molds, do so today.
Your glass fusing creations will be truly unique with you designing your own molds from ceramic fiber blankets or boards.
Make sure to give them a liberal application of rigidizer to harden them.
You will discover just how creative you actually are by doing this.