Cement Render, Bagged Masonry, AAC, Clay or Concrete Bricks or Blocks

The surface should be inspected to ensure that it is properly adhering, free of oils, grease, loose particles, dirt, efflorescence, mould, algae, moss or other foreign matter. Metal setting angles should not be used externally as corrosion of these will cause staining and damage to the paint film. Hairline cracking (shrinkage cracking) in render or concrete may show through the finished coating and allow excess water to enter the wall. If shrinkage cracking is evident, it should be treated by applying one coat of Murobond Sealer over entire surface before the application of Murobond. Any filling/patching of the surface must be fully cured before application of Murobond or colour shadowing may show through. Cement finishes such as render, bagging and concrete should be allowed to cure for a minimum of 3 weeks before application of Murobond.

Clay or Concrete Bricks or Blocks, Concrete, AAC

Murobond applied to block or brickwork will follow the jointing pattern of the surface. The slightly mottled finish helps unify the appearance while allowing the joints to show. The addition of clean sand to the mix creates an effect similar to bagging, reducing the visual impact of the jointing. If a flush finish is required, the wall should first be cement rendered. Highly porous block or brickwork (eg AAC) and non porous block or brickwork (eg dense extruded bricks) and concrete, should be first coated with a liberal application of Murobond Sealer applied directly from the tin to dry clean surface by brush, roller or spray at a rate of approximately 6 sq.m per litre (porous surfaces) - 12 sq.m per litre (non-porous surfaces) The first coat of Murobond cement paint is ideally applied as soon as the sealer is touch dry (approx. 20 minutes to 1 hour) and should be applied within seven days. Light dampening of surface prior to the application of the first coat of Murobond may be required to ease the spreading over AAC.

Paperfaced Plaster Board and Plaster

The surface should be inspected to ensure that it is properly adhering, free of oils, grease, loose particles, dirt, or other foreign matter. Surface should be dry. Plaster board joints and nail heads must be spot primed with Murobond Primer. Allow 4 hours to dry. Two liberal soaking coats of Murobond Primer are then applied to all surfaces. Allow 12 hours to dry between coats and before applying Murobond Cement Paint.

Previously Painted Surfaces in Sound Condition

The surface should be inspected to ensure that it is properly adhering, free of oils, grease, loose particles, dirt, efflorescence, mould, algae, moss or other foreign matter. Surface should be dry. Previously Painted with a Water-based Paint Externally, apply one liberal coat of Murobond Sealer directly from the tin to a dry clean surface by brush, roller or spray. The first coat of Murobond is applied as soon as the sealer is touch dry (approx 20 minutes to 1 hour) and should be applied within 7 days. Internally sealing is not generally required. Previously Painted with an Oil-based Paint Sand or chemically etch shiny surfaces to ensure adhesion and apply one coat of Murobond Primer. Allow overnight drying before applying Murobond cement paint.

Previously Painted Surfaces with a Lime Based Coating

The surface should be inspected to ensure that it is properly adhering, free of oils, grease, loose particles, dirt, efflorescence, mould, moss or other foreign matter. Surface should be dry. External Pressure washing or sand blasting is advised wherever possible to remove as much of the old coating as possible. Any lime remaining must be firmly bound. Internal: scrubbing with stiff brush is advised followed by application of Murobond Sealer. A liberal coat of Murobond Sealer applied directly from the tin to a dry clean surface by brush, roller or spray. The first coat of Murobond is applied as soon as the sealer is touch dry (approx 20 minutes to 1 hour) and should be applied within 7 days. Murobond Substrate Preparation and Priming.

Previously Painted Surfaces in Unsound Condition

Due to the high film thickness and the flat mottled appearance of Murobond, filling is not normally necessary to achieve satisfactory results. If a smooth flat appearance is required some filling may be necessary. It is recommended to apply a test sample of Murobond to establish the level of filling that is required. Priming Murobond is a moisture cured product, therefore it is important to ensure an evenly porous surface before applying Murobond. Where damage to the existing film is through to a porous underlying structure, these areas should be spot primed with two or more coats of Murobond Primer as necessary to approximate the porosity of the surrounding paint. Allow 12 hours to dry between the coats of Primer and before applying Murobond.

W.S.C. - Water Sheeting Conditioner

Murobond W.S.C. is a specially formulated aqueous emulsion of hydrophobic ingredients, which is added to Murobond prior to application. W.S.C. significantly reduces the transmission of liquid water through the Murobond coating and as it is incorporated in the film, it performs for the life of the coating. W.S.C. is advised for Murobond applied to walls in exposed conditions or when improved waterproofing is required, such as parapet walls. W.S.C. is particularly advised for strong colours in Murobond (such as Slate, Fossil) as these show greater ageing. It should only be used as an additive to Murobond.

Addition of sand

Sand can be added to the Murobond mix in the ratio of 3 parts powder, up to 1.5 parts sand and approximately 2 parts water to form a paint the consistency of thickened cream. The amount of sand is determined by the desired texturing with 50% by volume on Murobond powder being the maximum. Different amounts may be used in each coat with the lower amount typically being used in the second coat.

Thinning with up to 10% water in hot or windy conditions is acceptable.

Clear Acrylic Sealer

Murobond creates a flat patina on interior walls which can show marks. In high traffic internal areas we recommend overcoating with Murobond's Clear Acrylic Sealer to improve serviceability. Allow a minimum of 12 hours after the application of the final coat of Murobond before applying Clear Acrylic Sealer. The Clear Acrylic Sealer will increase sheen level and darken the colour - test an area to ensure satisfactory result before coating entire surface.