Drilling and Pit filling

[Chris S]

Today I repaired a star break. I drilled at the impact area not to deep. The break filled great. However after curing I noticed a little air bubble in the pit area. I used a needle cap to apply the pit filler. Two qusetions: what is the best way to fill a drilled hole. Number two after curing can you redrill the the pit filler to take out the air bubble with out causing more of a mess?

[Dave M]

Chris,
This is what works for me. I pressure cure every repair before removing the injector. After removing the injector I carefully wipe the excess resin from below the break and scrape the resin off the impact point flush with the glass, than immediatly put my curing light over the break for about 30-60 seconds (no pit filler or curing tab yet). Now, slide the curing light aside and add your drop of pit filler with curing tape and cure.
If you get a small air bubble I take the corner of a razor blade and dig out the cured pit filler. This usually will remove the air bubble. Drop in another drop of pit resin and cure again!
This is how I cure the repair and it has worked for me for 11 years. Others may have other methods and may work just as well or better. Good luck!

[repare-brise]

Chris

What Dave said is great, one little addition is don't put your pit resin directly over the hole. Place a drop beside or below the hole and use a combination of capiliary action and the tip of a needle/probe to coax the resin in the right direction. This is especially appilcable with deep holes/pits. As far as redrilling to get rid of the bubble, it's not a problem as far as I am concerned, just be carefull, some pit resins are harder to drill than glass.

Enjoy

[gt_repair]

I have been doing the same as dave. The resins have a differant set time. If you are using a LV type resin and aplythe pit filler and tape at the same time the pit filler will set first and the LV type resin will set later. That will couse your air bubble from seperation of the two resins.

Pre-cure the LV or what ever resin you are using, that will thicken the resin to the same density as the pit resin and they will bond together. then scrap down and polish.

A lot of the time I will start the paper work as the pre-cure as happening, then I will pit fill and finish the paper work, scrap, polish, clean up, have customer sign off. NEXT.

[Chris S]

Dave, Yvan, Don,

Thank you for the advice gentlemen.