CD77 Stripper
Basic Use
CD77 Stripper is a water soluble gel designed to remove multiple layers of latex paints, stains, varnishes, linseed oils and other film forming coatings that hide the original color and texture of wood. CD77 Stripper allows you to start over from the beginning, by restoring previously coated or greyed wood to a similar condition to new timber before application of non-film forming Cutek® CD50. CD77 Stripper is designed to restore timber without damaging the cell structure or interfering with future coatings on the newly stripped surface. CD77 Stripper also removes finishes from all types of surfaces, including masonry and metal.
Technical Data
Colour |
Semi Transparent Gel |
Coverage |
0.5 - 1.5 sq metres/litre |
Packaging |
5 and 20 litre containers |
Preparation
It is important to properly prepare the surface to be restored to allow for the proper action of CD77 Stripper, and to protect the environment. If dirt or a heavy chalk film exists on the surface, rinse thoroughly with water first and leave to dry before applying CD77 Stripper. CD77 Stripper is a toxic chemical, so when it is used consideration must be given to containment of dissolved residue so that vegetation is not destroyed or waterways contaminated. Accordingly, we recommend the use of impervious plastic drop sheets to collect the stripped residue.
CD77 Stripper will strip coatings off virtually any substrate including powder coated joinery, therefore it is recommended that any surface that is not being restored but is at risk of exposure to the product be masked off completely.
Because of the wide variety of coatings and film thicknesses that are encountered, a test area should always be stripped prior to commencement of the project to determine how much time the restoration procedure will take, and how much CD77 Stripper will be required. It is important for the user to determine the suitability of the product for its intended application.
Application
Using a synthetic brush, roller, or low-pressure high volume airless sprayer apply a thick coat of CD77 Stripper to the surface. Let CD77 Stripper remain on the surface until all of the old coating has softened uniformly across the coated surface. It is important to avoid premature rinsing. If CD77 Stripper has to remain on surface for 10 minutes or longer, it may dry prematurely. In this instance re-moisten dry areas with a further generous application of CD77 Stripper. A reapplication of the entire process may be necessary for overhangs, corners, windows and the like where CD77 Stripper tends to move downwards and away from the substrate therefore reducing product effectiveness.
Removal
Once the CD77 Stripper has dissolved the previous coating, it must be power water rinsed (hot water works best) off. For best results wash off with high-pressure water at 1000 — 1300 p.s.i. pressure. Clean from the lowest point and work upwards methodically. ALWAYS clean off with a water jet that produces a "putty knife" shaped fan that is 40 — 50mm wide about 100mm out from jet. Adopt a continuous "mowing action" working with power water fan-jet 100mm from the face of the substrate. DO NOT use "turbojets" on timber. CAUTION must be used when cleaning soft timber to reduce the pressure and avoid scouring of sapwood. The longer that CD77 Stripper is left on the substrate, the greater the rinse time required.
Additionally, certain types of wood surfaces may leave a raised grain effect after stripping is completed. Sanding or poly pad scrubbing may be required to smooth out this condition.
Cleanup and Precautions
CD77 Stripper is slippery when applied to surface so use caution when walking on horizontal surfaces. DO NOT walk on surfaces coated with CD77 Stripper. Water flush all equipment, vegetation, paths, concrete, asphalt, and other adjacent surfaces immediately upon contact. Leave job site free of any trace amounts of CD77 Stripper. Always remember that CD77 Stripper is a toxic chemical, and refer to the health and safety considerations listed in the MSDS sheet prior to commencing any project. Fully protect adjacent surfaces including vegetation and be aware of the potential for wind drift into areas with cars or pedestrian traffic when rinsing or applying. Never leave behind any containers or equipment, and appropriately label any containers of residue for disposal.
Recoating
Following the restoration of the timber with CD77 Stripper, it is important to complete the restoration process by coating the timber with Cutek® CD50. Application of Cutek® CD50 eliminates the need for any future stripping because it will not form a film that will peel off like a varnish. Additionally, it has been specifically designed to maximise the dimensional stability and aesthetic qualities of natural timber, while providing protection against ultraviolet degradation, moisture and biological growth. Always remember that film-forming coatings can peel and may need to be sanded, stripped, or scraped when reapplication is necessary.
It is important that the restored timber is completely dry before the application of Cutek® CD50. Allow 3 - 4 days of hot, fine drying weather. If unsure, use a moisture meter to measure the residual moisture content of the restored timber to make sure that it is less than 18% before coating.
Failure to treat the wood after restoration will result in the weathering process occurring more rapidly than it took prior to restoration.