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TECHNICAL DATA SHEET
Castleseal Hydrophilic Primer
DESCRIPTION AND USES
Castleseal Hydrophilic Primer is a clear, solvent based epoxy primer, which is used on porous substrates to remove moisture and seal the pores prior to painting. The hydrophilic properties of Castleseal enable it to locate and displace water from the pores of the substrate where it then cures to form a permanently sealed surface layer. As well as waterproofing it also prepares the surface for painting with any paint, other coating, plaster or screed. Castleseal Primer will also strengthen porous masonry such as sandstone and limestone reducing the likelihood of spalling. It can be used indoors and out.
USES INCLUDE:
• STONE BUILDINGS
• CONCRETE & BRICK STRUCTURES
• FRIABLE STONE
• PLASTER & GYPSUM
• CONCRETE FLOORS
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TECHNICAL DATA |
CHEMICAL RESISTANCE |
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Colour (mixed) Viscosity Specific gravity: Base Hardener Mixing ratio (by weight) Working range Pot life Min. curing temp. Tack-free time Full cure
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Light Straw Mobile liquid
0.91 0.89 2:1 Base to Hardener
+ 5 to + 30ºC 24 hours at 25ºC +5ºC 2 hours at 25ºC 7 days at 25ºC |
Water Oils Petrol Diesel Oil Acetone Carbon Tetrachloride Chlorine Formaldehyde Hydrochloric Acid Methyl Ethyl Ketone Nitric Acid Phosphoric Acid Sodium Hydroxide Sulphuric Acid
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+ + + + + + + 0 + + 0 + + + |
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+ = Resistant 0 = Not resistant. All chemical resistance is measured at 21ºC
INSTRUCTIONS FOR USE
Castleseal Hydrophilic Primer can be applied by low pressure spray, roller or brush. One coat will normally be sufficient to seal most porous surfaces and leave the surface ready for painting. All surfaces to which Castleseal Hydrophilic Primer is to be applied should ideally be clean, dry and free from dust and loose particles. Acceptable penetration and adhesion can be achieved on damp surfaces (remove surface water first). Mix two parts of Castleseal Base with one part of Hardener and stir well for 2/3 minutes. (7.5 litre packs are pre-measured). Mixed material will remain usable for 24 hours if the container is kept sealed.
Application with a low pressure sprayer is most economical but rollers and brushes are equally effective (if spraying, use a sprayer suitable for solvents otherwise the internal seals may be affected by solvent). The Castleseal ''Sure Shot'' sprayer is recommended.
After application, allow the material to soak in. Water droplets may appear on the surface as the product penetrates and drives out the moisture. Allow to cure for at least 2 hours before overcoating.
One coat of Castleseal is an effective waterproof barrier and may be over-painted with any conventional paint system. It may also be plastered or rendered over with conventional screeding materials.
WARNING: Castleseal contains volatile, highly flammable solvents. It must only be applied outside or in a well-ventilated area otherwise breathing apparatus and extraction equipment will be required. Observe Health and Safety information on labels.
Clean equipment with acetone or M.E.K. before the material cures.
QUANTITY ESTIMATION
Wet film thickness 50 microns
Dry film thickness 17 microns
Coverage 15-18 m²/litre
IMPORTANT NOTE:
Castleseal Hydrophilic Primer is only suitable for porous surfaces. Do not attempt to use it on surfaces, which have already been sealed with other products. A small test area will determine whether the product can soak in. If it does not penetrate, do not use.
This data is provided in good faith for guidance purposes however due to variations in equipment and local conditions. Users should carry out their own tests to ensure that satisfactory results can be obtained.
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