The motivation for the completion of the final thesis on the topic of Internationalization of business on the example of the selected company is because the author is the owner and director of the selected company (KAZ doo Zagreb), with the primarily activities for protection against capillary moisture using a PROsystem device. The research problem in this paper is the underdeveloped business strategy of the selected company to enter the Russian market. The main objective of research is to identify, evaluate and choose a strategy for entering the Russian market. To achieve the main objective of this research, key data and information from the secondary (professional and scientific literature and company documentation) and primary (interview methods) sources are collected. The results of this research show that KAZ Ltd. has resources (human, material, financial and information), there is a demand for the products of the company KAZ d.o.o. (PROsystem), its products / services are acceptable based on the price and quality in the Russian market. Furthermore, the research shows that it is best to enter the Russian market with existing products / services (market expansion strategy - market development). Finally, research has shown that the best way to enter the Russian market is through internal (organic) growth. Recommendations for further research are analysis and comparison of how to go to in the Russian and Chinese markets.