Cuprinol DucksBack Black 5L

Cuprinol DucksBack Black 5L.

Ducksback is not deep penetrating but very much relies on the timber texture for adhesion. For this reason it is recommended for rough sawn timber only. If the construction contains smooth timber components, or has lost texture through weathering then adhesion performance will be reduced. The product only becomes water repellent when it is fully dry and until then it can be damaged by heavy rain. In addition, surface dirt, algal growth and any previous treatment which retains water repellency may repel the Ducksback, causing poor adhesion