Translation
Hello
Needless to say, this is a most important step in your construction and of course special care must be taken in the seat of the windshield otherwise after a few months or even weeks only you will see a beautiful crack due to the fact that if the bearing surface is not uniform enough the adhesive seal which will be too thick will be flexible at this point more than others and therefore the windshield will cloud a little during deformations as minimal as they are not the same everywhere and as you have seen the edges are not polished far away suddenly a crack may leave from in the area where the joint was too thick In fact it is less serious if it is between the corners but it is very serious if it is in a corner and we feel it "limping" a little It must be corrected from 2/3 mm apart (this is in fact the thickness that the adhesive joint should have once the windshield is applied and very slightly "pushed" (in any case especially not with cushions and straps as seen in videos Nowadays at Mercedes there are quite sensational glue cartridges which glue 4 times more than the old Sikaflex 221 and which requires only one application of primer (only on the glass); this glue once polymerized is more rigid than any other and therefore with its superior tackiness also keeps the windscreen much more What kind of seal do you have? You only need a "" glue cover "and this one without" lock "key In fact it is necessary to equip the entire periphery of the windshield with this type of seal (there is a great one at "Comptoir de la Carrosserie" (Toulouse) which goes very well, cheap and super discreet once put on; once the windshield fitted with gasket (you must borrow handling suction cups) You put it blank to check that it leans regularly on the bodywork in the close vicinity of the cutout left for the thickness of the windshield. if the joint leaves days it is necessary to correct of course, you will have put shims of 3 mm to check that everywhere remains these 3 mm between the windshield and its support on the composite, then check that the seal is laid flat all over the entire turn, it may be that it is the seal that prevents you from the box corner and in this case the fact at this point of having 5 mm of vacuum is less serious and it will be up to you to put a thicker cord in this place In fact it is the quality and positioning of this seal that will give you a good assembly (clean and safe): putting the windshield "dry" highlights the faults well and still allows you to correct the supports; not only but also the overshoot because indeed it is not necessary that (if the central bodywork has been contorted to adjust hoods and doors that one or more places is set back from the face of the glass, in this case the touch-up is compulsory so that (as explained above) the joint presses correctly everywhere Once the montages in white and retouching done the collage poses no problem 1 / position the suction cups 2 / place the window opening upside down on a fairly large trestle (never the windshield on a table !!) 3 / thread the joint and glue the joint at the bottom in the middle (cyano) 4 / pass the glass primer 5 / hide the dashboard area 6 / degrease (acetone or other degreaser from the glue kit) 7 / install the adhesive joint with a special tip with a special cut at the end (sticks will have been placed next to the places where it is thicker, it must be 2/3 of the bonding area so that once crushed it goes towards the joint and sticks it and does not stain the top of the dashboard 8 / A 2 turn the glass over and apply it without ever forming, the pressure must be slow and this over the 5 cm around the edge to be sure that the seal applies, does not sink, etc. 9 / delicately unhook the inside if glue comes on the edge of the ribbon cut and leave this end for the next day Clean the outside if a little glue has passed through the joint with dishwashing liquid or a pad soaked in very light thinner (be careful, black has a dirty tendency to spread out and the cleaner gets into the paint, so too sometimes let polymerize and cut a few minutes later with a scalpel.