DATA SHEET: LUBISOL A-Seal

 

1.General Description

  Lubisol A-Seal is a monolithic high alumina kit used for hermetic sealing and hot repair of glass furnace fused-cast crowns. It is supplied as a dry mix packed in 26 kg paper bags and the LFS liquid bond, packed in 13 kg plastic canisters. They are mixed in a mortar mixer just before use in the following proportion (weight %): dry powder – 80 : liquid bond -20. Some small amount of water is added during the mixing to obtain the desired fluidity of the mix. For the convenience of the user 2 paper bags dry powder (52 kg) should be mixed with 1 canister (13 kg) LFS bond.

  The material is suitable for cold or hot application. The wet mix starts setting at room temperature after 2-3 hours.

  The most important features of LUBISOL A-Seal are:

  • Strong and durable adhesive bond with alumina refractories up to 1650 °C, and a coefficient of thermal expansion - very similar to the one of alumina bricks.

  • Very high corrosion resistance against the action of alkali oxides and other fluxes.

  • High purity of the raw materials used, with very low Fe2O3 content.

  • Very long shelf life – more than 60 months.


2. Way of Application

  Lubisol A-Seal is applied as a protection hermetic sealing layer by patching over the fused-cast Al2O3 crown in a thickness of 20-30 mm. The application can be done before or after the heat-up of the glass furnace.

  Lubisol A-Seal is a heat setting composition, and it is converted into a hard body under the action of the heat of the glass furnace. A ceramic bond is developed later at higher temperatures. The material is suitable for hot application for hot repairs or hot sealing of expansion joints. An Application Technology is delivered by the supplier, together with the material.


3. Chemical Composition and Properties


3.1. Chemical Composition of the dry mix (%)

Al2O3
SiO2
CaO

90.0
8.0
1.5


3.2. Other Properties

Maximum grain size (mm)
Material requirement (kg/dm3)
Working temperature °C
Shelf life (months)

3.00
2.60
1650
60


4. Safety Data Sheet

  The Liquid Bond Lubisol LFS contains a diluted mineral acid – H3PO4.

  Safety measures should be taken to protect the eyes and hands of the workers from the action of the acid. They must be wearing protective goggles and gloves. The acid is easily soluble in water. If needed for any reasons, the skin and eyes should be washed with clean water.