Limestone Sealing Information

Application

1. Stone should be sealed to application specifications below.
2. The sealant is supplied in 205 litre drums and must be stirred thoroughly before application. Bruhn Limestone must be kept free of mortar splashings and stains and the face surface of the stone should be protected at all times against damage during construction.
3. Stone should be power washed with a low pressure fan spray to clean pores before sealant is applied. Allow stone to touch dry before application of sealant. Wash from top to bottom.
4. Stone should not be washed or sealed until the mortar has hardened sufficiently.
5. SEALANT MUST BE APPLIED TO STONE WORK ONLY. Windows, window frames, door frames, timber, aluminium and all other materials should be protected against sealant application, otherwise wash off with clean water immediately if sealant is inadvertently applied to any of these materials.
6. Ensure site is free from dust during washing and sealing.
7. There are generally two methods of applying sealant. The first being by airless spraygun. Sealant should be applied in one heavy coat only, making sure once an area is coated it is not double coated as this may cause run marks.
   Alternately one coat of sealant can be applied by flood coat. Each block is satuated with sealant starting at top and working down the wall. The necessary drum application sealant equipment can be purchased from bruhn, utilizing a small compressor to pressurise sealant drum. Again making sure nothing is double coated.
   Apply sealant from top to bottom at 2 litres per square metre.
   Test a small area to ensure that the application rate is correct.
8. Allow at least 24 hours to dry. Allow two months for product to cure.
9. Wash out hose lines with clean water after use.
10. AVOID SEALANT CONTACT WITH EYES AND SKIN. TAKE ALL NECESSARY PRECAUTIONS TO FAMILIARISE YOURSELF WITH THE SAFETY REQUIREMENTS OF THE SEALANT. IF SWALLOWED CONTACT YOUR LOCAL POISONS INFORMATION CENTRE.
11. MIX SEALANT THOROUGHLY BEFORE EACH APPLICATION.
12. STORAGE – Store sealant drums under 24 degrees in a cool well ventilated area away from ignition sources.
13. SEALANT CONTRACTORS – Contractors who meet our approval are available to wash and seal limestone for clients. They do both new homes and also a wash, clean and re-seal of established homes. Please contact us direct for further details.