The main purpose of the experiment was to establish which consolidating products in impregnated wood are the most effective against wood decay fungi. Five different consolidators were tested: Paraloid B-72, Consolidating restaurateur, SG 715 BLANC (epoxy resin), R.712 polyester and the wood consolidant agent containing nano particles, which is still in development. From the already damaged wood objects, specimens of the dimensions of 50 mm x 25 mm x 15 mm were prepared and impregnated with the selected consolidating agents. The masses of the dried samples were about 50 % higher after impregnation with the agents. For the standard laboratory fungicidal test (EN 113), the Poria vaillantii and Gloeophyllum trabeum wood rotting fungi were used. Generally, the results revealed that all consolidated specimens were more resistant to Gloeophyllum trabeum than against Poria vaillantii. Among the used consolidators the best anti-fungal efficacy was provided by the Consolidating restaurateur, followed by the SG 715 BLANC, wood consolidant with nano particles and finally, by the R.712 polyester (mass los were lower than 3%). Paraloid B-72 exhibited the weakest resistance against both tested fungi from all five substances.

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