Turn off the water supply if necessary.
1- Wear protective gloves.
2- Sanding, cleaning, degreasing, drying the surface.
3- Remove the plastic film only on the portion to be cut. Using a cutter / knife, cut a round of mastic to have the desired amount. Put the rest of the product back in the tube and close it to keep for the next use.
4- Mix the product until a uniform and homogeneous color is obtained.
5- Apply the sealant directly to the part to be repaired, pressing firmly. Insist well on the sides. The product applied must extend beyond the part to be repaired by a few millimeters.
6- Wait one hour before refilling the water