It is more convenient to work together.
Use a slotted screwdriver to pry and fill the edge of the rubber glass seal behind the edge of the window opening
Holding the screwdriver in this position, use another screwdriver to pry off and fill the edge of the seal from the started section to any other side. Thus, we “pass” the bottom and sides of the opening.
The first screwdriver can be removed after the first 10 cm of sealant has been inserted.
Outside, we take the lower edge of the glass away from the door.
Then, lowering the glass down, take it out of the opening.
Remove the seal from the glass.
We put the seal on the new glass, starting from the corners.
In the cut of the seal, starting from the middle of the lower part, we insert a strong thin cord in a circle. At the junction of the cord we make an overlap of about 10 cm.
Insert the glass into the opening, "dressing" its lower part on the edge of the opening.
Center the glass in the opening.
From the inside, we smoothly pull out the cord, while the assistant from the outside gently presses the glass and keeps it from moving.
Thus, we “pass” first the bottom and then the two sides of the glass
Fill the upper part from the edges to the middle, "helping" the seal to sit on the edge of the opening.
If the upper edge is not completely refueled, we "reset" the glass with not strong blows with the base of the palm on the seal of the upper edge of the glass in the direction from top to bottom.