top of page

Normal Techniques for Masonry 

The basic technique established over many years has five stages carried out in order:

istockphoto-1031584778-612x612.jpg

1. To pre-wet.


2. To degrease and prepare the surface for the acid cleaner.


3. To power jet off the surface debris.


4. To clean using the appropriate acid-based product.


5. To power jet off the surface debris.

The purpose of pre-wetting is to fill the pores in the masonry and mortar with water so as to prevent deep chemical absorption and retain the agent on the surface where its cleaning action is needed and from where it can be removed more efficiently later.

A cold-water jet is normally used and each square metre of surface washed and wetted for about 30 seconds after which a short time is allowed (5 – 10 minutes) for surface water to drain down. This jetting also removes dust and loose organic matter from the masonry face. This should be carried out on all
types of masonry except prior to using organic solvent-based paint stripper or silicone water
repellent or solvent based degreasers.

Therefore, specially designed primer mortars are available for the restoration mortars. The Remmers Primer Mortar ‘soft’ also has salt accumulating properties.

Surface Preparation & Degreasing

Prepare your walls properly before using an acid cleaner for the best results

painter-wall-768x512.jpg

If this stage is omitted, then the efficiency of the acid-based cleaner will be reduced and the results may be patchy. Heavy black surface carbon soiling may require repeated degreasing treatments or extended contact times and this will be evident from the first test patch trial. Care would be necessary regarding the contact times on sandstone etc. Hydrofluoric acid containing chemicals left on the surface of some masonry, for long periods, can lead to colour changes or to white deposits forming. Only weak acids are necessary for neutralisation on clean masonry or calcited stone.

For cleaning exterior masonry, we recommend a selection of one of the following:

These agents can be applied on any type of pre-wetted stone, brick or concrete etc., as shown in the table, following the safety precautions given in the individual product data sheets.


Thickened (viscous) products are applied by brush and worked well into the surfaces leaving an even and thick coating of the product.


Non-viscous products can be applied by low pressure spray units but considerable additional dangers are involved and so spray application is not a preferred technique.

Normal Techniques for Masonry 
Surface Preparation & Degreasing

Degreasing Products

Bio Kleen.jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Bio Kleen

Safe to use on aluminum, galvanized metal, stainless steel and plastic. Cleans and sanitizes food processing equipment. Safe to use on food transport vehicles.

Tilt Cleaner.jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Tilt Cleaner

Tilt Cleaner is a fast acting versatile cleaner developed for the road transport industry as a heavy soil and traffic film remover, for those jobs where the use of a strong alkaline detergent is required.

Clean SL.png

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Clean SL (TFR)

[Traffic Film Remover] Surfactant solution for removing grime, dirt incrustation, dust, oil and grease deposits

HD 400 D.png

Industrial Cleaning - Heavy Duty Degreasing - Carbon - Oil & Grease - Gel

HD400

A special formulation for the breaking down and removal of black carbon dirt, oils and greases from any masonry surface.

Quick Clean .png

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Quick Clean

Quick Clean is a concentrated, alkaline, low odour, non-caustic, anti-static cleaning and degreasing agent for hard surfaces.
Quick Clean has a rapid wipe off cleaning effect and is totally phosphate free.

Hard Surface Cleaner Concentrate .jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Hard Surface Cleaner

A non caustic alkaline cleaner used for the routine cleaning of all types of hard surfaces. Ideal for the removal of light oil on industrial machinery and workshop floors.

Oil & Grease.jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Oil & Grease Remover

Remmers Grease & Grime Remover is an alkaline cleaning agent for the removal of grease, oil, printing ink, soot, wax, ink and other stubborn soiling.

HD 400 S.png

Industrial Cleaning - Heavy Duty Degreasing - Carbon - Oil & Grease - Sprayable

HD400 S

It is not viscous like HD400, with care it can be applied by spray. It is a special formulation for the breaking down and removal of black carbon dirt, oils and greases from any masonry surface.

Standard Non-Caustic TFR.jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Standard Non Caustic TFR

Standard Non-Caustic T.F.R. is a non-caustic alkaline cleaner designed for the use of routine cleaning of all types of decorative paintwork.

Neutral Soap.png

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent - Counter tops

Neutral Soap

Provides high quality non-corrosive cleaning action on most surfaces

766-Limestone-Masonry-Prewash-5-gal.jpg

Industrial Cleaning - Heavy Duty Degreasing - Carbon - Oil & Grease 

766 Limestone & Masonry Prewash

When used properly, the prewash dissolves and assists in removing heavy carbon encrustations from brick, terra cotta, sandstone, limestone and most other masonry.

Selection of Appropriate Acid Based Cleaner

Selection of Appropriate Acid Based Cleaner

It is always important to know what you are using before applying it to any surface. 

Acid Brush Application.jpg

Normally chemicals are applied to areas already wetted following a degreasing operation if not, then pre-wetting will be required before application of the acid based cleaner. Care must be taken. Acid based cleaners should not be used on calcited stone as this would have adverse effects on such stone. Frequently after degreasing the surface of calcited stone is then clean and only weak acid neutralisation (LC500) is necessary. On types of masonry which are more difficult to clean some contractors prefer to use stronger acid formulations with shorter contact times (eg  SC100, RS250). Alternatively use the long contact methods where strong acids, such as Hydrofluoric, are not to be used.

Formulations containing Hydrofluoric acid should not be used on pre-cast concrete or normal concrete as white marks can be formed. These materials would however be cleaned by the normal degreasing process. It is recommended that acid cleaning agents be used as dilute as possible for efficient cleaning.

Acid Cleaning Products

Clean FP .jpg

Commercial Cleaning - Kitchen - Office - Warehouse - Farm- Detergent

Clean FP

[Façade Cleaning Paste] Removes heavy urban soiling (soot, dust, industrial dirt, etc.)

LC 500.jpg

Industrial Cleaning - Limestone Cleaner - Hydrocarbons - Sulphurous deposits

LC500

LC 500 is used to clean dirt, hydrocarbon and sulphurous deposits off limestone, marble and precast concrete.

RS 250.jpg

Industrial Cleaning - Carbon Remover - Acid Cleaner - Red Sandstone - Special Cleaner

RS250

RC 250 has been specially formulated for use on heavy duty soiled red sandstone, instead of SC100

Heavy-Duty-Restoration-Cleaner-NE-5-Gal.jpg

Industrial Cleaning - Carbon Remover - Acid Cleaner - Brick - Sandstone - Granite

Heavy Duty Restoration Cleaner

Heavy Duty Restoration Cleaner dissolves heavy carbon and many other stains commonly found on masonry buildings in highly polluted areas.

Aluminium Cleaner.jpg

Industrial Cleaning - Aluminium Cleaner - Acid Cleaner

GLEAM ALL

[Aluminium Cleaner] Gleam All is a blend of acids and powerful surface active agents which have been specifically designed for the cleaning and polishing of aluminium fabrications

Vana-Trol-5-Gal.jpg

Industrial Cleaning - Brick Cleaner - Vanadium & Manganese Remover

Vana Trol

Vanatrol is a concentrated acidic cleaner for new masonry surfaces that are subject to vanadium, manganese and other metallic stains.

Clean WR.jpg

Industrial Cleaning - Tiles - Slabs - Acid - Heavy Dirt

Clean WR

​[Combi WR] Acidic cleaner Removes heavy urban soiling (soot, dust, industrial dirt, etc.)

SC 100.png

Industrial Cleaning - Carbon Remover - Rust Remover - Acid Cleaner - Brick - Sandstone - Granite

SC100

SC 100 is a acid cleaner for the removal of carbon dirt and grime from sandstone, unpolished granite, brick and terracotta. It will also  remove iron stains from masonry.

YB 300.jpg

Industrial Cleaning - Carbon Remover - Acid Cleaner - Yellow Brick - Special Cleaner

YB300

YB 300 is primarily a yellow brick stock cleaner, it reduces the tendency for residual, adverse dark stain marks which can result if other HF based chemicals are used

RS 250.jpg

Industrial Cleaning - Carbon Remover - Acid Cleaner - Red Sandstone - Special Cleaner

RS250

RC-250 has been specially formulated for use on heavy duty soiled red sandstone, instead of SC100

Avesta 401.jpg

Industrial Cleaning - Stainless Steel Cleaner - Acid Cleaner

Avesta 401
Stainless Steel Cleaner

Stainless Steel cleaner that cleans grime, rust and leaves it looking new. 

Clean AC.jpg

Industrial Cleaning - Efflorescent Salts - Cement - Mortar - Clinker - Powder

Clean AC

[Clinker Cleaner] Acidic cleaner (powder) Removing mortar residues and lime and cement films.

BT 200.jpg

Industrial Cleaning - Carbon Remover - Rust Remover - Acid Cleaner - Brick work - Terracotta

BT200

BT 200 is a cleaner formulated for the removal of dirt, carbon, algae and rust stains from brick work and terracotta.

Contec-USP 705 Rust Remover.jpg

Industrial Cleaning - Rust Remover - Metal Oxide 

Rust Remover

[USP 705] Rust Remover is a concentrated detergent/acid pre-treatment for the removal of rust and metal oxide deposits from deteriorated surfaces.

YB 300.jpg

Industrial Cleaning - Carbon Remover - Acid Cleaner - Yellow Brick - Special Cleaner

YB300 

YB 300 is primarily a yellow brick stock cleaner, it reduces the tendency for residual, adverse dark stain marks which could result if other HF based chemicals are used

Avesta 630.jpg

Industrial Cleaning - Stainless Steel Cleaner - Neutraliser - After Wash

Avesta 630
Passivator

The Stainless steel after wash that removes contaminants and encourages the passive oxygen film to form after cleaning.

The Protection of Selected Materials

The Protection of Selected Materials

Some chemicals can damage the surrounding surface you are cleaning

Plastic over window.jpg
  • Peelable Coating:

  1. This covers the surface with a plastic film which can later be removed by peeling it off. The product is applied onto dry smooth surfaces by roller or brush, to form a complete film some 0.5 to 1mm in thickness. This protection is suitable for glass, polished granite, anodised aluminium and galvanised metal. It is not suitable for rough surfaces nor on UPVC. The coating will need to be replaced if longer than 6 months elapses.

  • Adhesive Tape

  1. Use waterproof adhesive tape and fix polythene sheets to this to provide a shield suitable for use on glass, polished granite, painted surfaces - aluminium, zinc and galvanised metals - but not for rough absorbent masonry.​

  • Spray Bar

  1. Use a spray bar giving a fine water jet every 5 – 6 inches apart which washes continually over the surfaces to be protected. This is not normally used for glass or polished granite but is used where chemical run down and wash waters pass over calcited stone.​

bottom of page