Hi David: I agree with Tony that injection through a hole could cause a hydraulic effect that could actually widen the gap. Also, these glues and silicones are so viscous that they probably wouldn't fill the entire gap.
Bonding agents work best when thin coats are applied to both surfaces and when pressure is applied until the agent dries. I know this sounds radical, but I think your best bet would be to carefully make a clean cut or break into the uplifted stone sheet so that it could be removed from the stone. Then it should be fairly easy to coat with adhesive the bottom of the sheet and the top of the stone for rejoining. I'd press the sheet down onto the stone with even pressure using a flat board so the sheet doesn't crack and let it dry. I'd use 50 year silicon from a glue gun. John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com> ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <sundial@rrz.uni-koeln.de> Sent: Monday, November 25, 2002 12:14 AM Subject: flaking sundial > Object - a vertial south sundial of 1700, in a sandstone type of material. > It is 24 inches square. with carved numerials and hour lines. > > Went tapped, an area about 12 inches diameter sounds hollow where a thin surface area is detached from the backing of the 1.5 inch thich dial. > > Does anyone know how to secure this loose area to the sound stonework behind ?. > > I quesstimate this loose area is about one eighth of an inch thick. > > Perhaps maybe drilling a tiny hole, and injecting some bonding agent. > > It is planned to do this work next year in warm weather. > > Your help much appreciated. David. > > > _______________________________________________________________________ > Freeserve AnyTime, only £13.99 per month with one month's FREE trial! > For more information visit http://www.freeserve.com/time/ or call free on 0800 970 8890 > > > - > -
