Porter’s Limeproof Undercoat Sealer is an interior\/exterior use undercoat\/primer that can be applied to bare paintable surfaces as an undercoat sealer, or for use over previously painted surfaces as an undercoat primer prior to the application of a Porter’s paint or finish. Ultra matt finish. Not suitable for use over oil-based paints or new unpainted set plaster.
Touch Dry
1 hour ( at 25 Deg C and 50% relative Humidity)
Cleaning materials
Water
Application Tools
Airless Spray, Brush, Roller, Other
Not suitable over new/bare set plaster.
Not suitable for use over previously oiled timbers.
Do not apply in high humidity, below 10°c or above 30°c.
The substrate should be a clean well-held surface free from loose material, dirt, dust, grease, oil and mould.
Newly completed walls should be left to cure before the application of Porter&rsquo ; s Limeproof Undercoat Sealer. Minimum drying/curing times:
Cement render - 28 days
Cement &ldquo ; bagged&rdquo ; surface - 14 days
Bricks and mortar - 56 days
Filled concrete blocks - 56 days
Pre-cast and in-situ concrete - 56 days
The substrate should be a clean well-held surface free from loose material, dirt, dust, grease, oil, release agents, mould, and anything else likely to inhibit adhesion. Newly completed masonry walls should be left to cure before the application of Porter&rsquo ; s Limeproof Undercoat Sealer.
RE-COATING LIME WASH OR INTERNO: Ensure the surface to be undercoated is a clean well-held surface free from loose material, dirt, dust, grease, oil, mould, and anything else likely to inhibit adhesion. Lime washes, particularly on exteriors, can weather and age, creating a powdery surface. Although this powdery residue is normal for lime wash, when intending to apply any undercoats or sealers, this powdery residue must be removed, and the surface made stable.
On new unpainted fresh set plaster do not proceed until plaster has thoroughly set and has dried completely. Firstly, apply 1 coat Porter’ s Mineral Silicate Primer by brush or roller. Touch dry 20 minutes. Allow 2 hours dry time. Then apply by brush, roller or spray 1 coat Porter’ s Limeproof Undercoat Sealer. Touch dry 2 hours. Allow 6 hours dry time.
Do not apply paint if Relative Humidity is above 85% or temperature is within 3°C of Dew Point.
Do not apply if the surface temperature is greater than 30°C or below 10°C, or likely to fall below 10°C during the application or drying period.
Stir thoroughly prior to use. Apply one or two coats by brush, medium nap roller or spray. Touch dry in 1 hour. Allow minimum 6 hours dry time between coats. Allow 6 hours dry time before over-coating.
Spray details (recommended by Wagner):
Tip size: 24thou. Filter: Green. Up to 100ml per litre of water can be added to aid spraying.
