Estimate How Much Product You Need
To choose the right pack size, calculate the geometric volume of the impression and add a 20% margin. This gives you the pack size needed for a complete impression, though a partial impression can also reduce how much product you use.
The Method in Three Steps
Estimate the theoretical volume first, then add a margin. This avoids running short in the middle of an injection and wasting product.
- Calculate the geometric volume of the zone to reproduce, whether it is a cylinder, groove, cavity, or surface to cover.
- Add 20% for the injection, the grip, and possible touch-ups.
- Choose a pack size that covers at least one complete impression without reloading.
A Worked Example
A cylindrical cavity of 80 ml becomes about 96 ml with the margin. One 50 ml cartridge is not enough, so you need two cartridges or a product in a 400 ml cartridge.
Pack Sizes
Standard Fluid and Pasty products come in 50 ml cartridges. XL products are available in 400 ml cartridges, bottles of 1.7 L (two bottles of 850 ml), and cans of 10.2 L. An XL product is not the standard product in a bigger pack, so check its times and removal constraint before switching.
Use Less Product
If you need a profile or a surface finish and not a diameter, take a partial impression. A half impression uses half the product.
