Joint calculator
Calculate exactly how much sealant your project needs. Enter the joint dimensions and total length, we'll show consumption per metre and number of cartridges instantly.
Guideline calculation. Actual consumption depends on substrate, application and joint geometry.
Elastic or plastic joint? Here's how
The ideal joint depth depends on whether an elastic or a plastic sealant is used.
Joint dimensioning
To give the joint a long service life and reduce the risk of damage, there must be a suitable ratio between its width and depth. The aim is to keep the tensile and compressive forces in the sealant itself, not in the bond faces, which are always the critical point.
A joint's depth always refers to its thinnest point.
Plastic sealants
Depth = Width / 5 + 8 (±2 mm)
As a rule of thumb, the joint should be as deep as it is wide.
Elastic sealants
For joints ≤ 20 mm: Depth = Width / 5 + 5 (±2 mm)
For joints > 20 mm: Depth = Width / 5 + 4 (±2 mm)
As a rule of thumb, the joint should be half as deep as it is wide.
