Porter's
Lime Wash Exterior
Porter's
Lime Wash Exterior
About Porter's Lime Wash Exterior
Porter’s Original Lime Wash is a unique lime based coating which is designed to create a soft weathered patina reminiscent of the wonderful finishes on the building of Tuscany, Portofino and other regions throughout the Mediterranean. Porter’s uses slaked and aged lime to create an ageless beauty that enhances existing buildings and allows new buildings to immediately take on an established air and blend with their surroundings. Once the carbonation process starts, the lime “blooms” to create natural variations in colour, very often with slight streaking. During the lifespan of the product colour variations will continue and the streaking may appear more prominent around moldings, window\/door trim and other architectural elements. Colour variations will appear more noticeable in deeper colours. Lime Wash remains soft and gradually washes away over a period of 10 to 12 years.
Key Points
- Choose from a wide range of colours
- This product contains 0g/L VOC’s (Volatile Organic Compounds). VOC's contribute to atmospheric pollution
Quick guide
Touch Dry
2 hours ( at 25 Deg C and 50% relative Humidity)
Cleaning materials
Water
Application Tools
Brush, Other
Product specification
Precautions and limitations
Not suitable as a floor or paving paint.
For interior surfaces, use Porter’s Interno Lime Wash. Do not apply in high humidity, below 10°c or above 30°c. Do not apply to walls with a surface temperature below 10°c. Do not allow painted surface to remain damp into the evening when temperatures will fall below 14°c overnight. Low surface or air temperatures prevent the lime wash from curing properly and may cause the development of a whitish bloom of calcification over areas, in patches or over the entire surface.
Lime Wash Paint is not suitable for fibrous cement sheeting or other sheeting materials (such as Blue Board etc). Sheeted building products are designed to be flexible, and often use jointing compounds or tapes to bridge the gaps between the sheets. Lime Wash is a hard finish, and a flexible substrate may cause cracks to appear. When Lime Wash is wet the joints will shadow through.
Surface preparation
Previously painted surface
Previously painted substrates:
Previously painted surfaces with loose, peeling or flaking paint must be made sound by scraping off loose paint. Fill holes and cracks with suitable filler, sand and dust off. Spot prime all joints and repaired areas with Porter&rsquo ; s Limeproof Undercoat Sealer, then apply by brush, roller or spray 1 coat of same to entire area. Touch dry two hours. Allow 6 hours dry time. Complete the painting of all adjacent surfaces and trim items prior to the application of Lime Wash.
Off-form concrete and tilt-up slab construction:
Concrete and tilt-up surfaces require a thorough acid wash (20:1 dilution) and a thorough rinse to remove all traces of bond breakers/release agents and importantly, to remove any “ glazed” or “ polished” appearance, as Lime Wash can only adhere to an absorbent masonry surface.
Efflourescence:
Some masonry surfaces show evidence of efflorescence, which is white powdery alkaline salts sitting on the surface. This problem is caused by moisture having penetrated the substrate which puts these salts into a solution, which then migrates to the surface where the water evaporates and deposits the efflorescence salts onto the masonry surface, lifting any paint finishes that have previously been applied. Note: the need to determine the source of water penetration should be investigated and prevented. Prior to the application of Porter’ s Lime Wash the substrate should be treated with Porter’ s Salt Check, which is a penetrating efflorescence inhibitor.
Complementary products:
Porter’ s Limeproof Undercoat Sealer (coverage 12m² per litre) is recommended where an undercoat/primer is required when preparing substrate for painting.
Unpainted surfaces
Curing of new substrates:
Newly completed walls should be left to cure before the application of Lime Wash. Minimum drying/curing times: Cement render 28 days
Cement “bagged” surface 14 days
Bricks and mortar 56 days
Filled concrete blocks 56 days
Pre-cast & in-situ concrete 56 days
New/unpainted masonry substrates:
Substrate should be a clean well-held surface free from loose material, dirt, grease, oil and mould. Surface should be thoroughly swept and hosed to remove all dust, loose sand and projecting cement material. Porter’s Lime Wash is applied directly to the bare wall. Complete the painting of all adjacent surfaces and trim items prior to the application of Lime Wash.
