NOVELTY - Preparation of reagent combustible capable of mixing with other combustible which is biological, fossil or mineral involves using reagent (R1) including ethyl alcohol and sodium hydroxide, reagent (R2) containing ethyl alcohol and sodium hydroxide, reagent (R3) containing boric acid, and reagent (R4) containing hydrochloric acid and purified water to obtain reagent combustible having universal bio-combustible or additive with reagents having ethyl alcohol, sodium hydroxide, boric acid, hydrochloric acid and purified water. The additive is produced from refined sunflower oil.    USE - Preparation of reagent combustible capable of mixing with other combustible (claimed).    ADVANTAGE - The method economically and reliably provides reagent combustible capable of mixing with other combustible, with reduced microbiological contamination, oxidation, deterioration, impurities, stability, hygroscopicity and degradability.    DETAILED DESCRIPTION - Preparation of reagent combustible capable of mixing with other combustible which is biological, fossil or mineral involves using reagent (R1) including 286 g ethyl alcohol 77 degrees GL having alcoholic degree of 70 degrees INPM with variation of 30% and 14.85 g sodium hydroxide with upper or lower variation of 30%, reagent (R2) containing 1200 g ethyl alcohol 96 degrees GL having alcoholic degree of 93.8 degrees INPM with variation of 50% and 22 g sodium hydroxide with upper or lower variation of 20%, reagent (R3) containing 110 g boric acid with upper or lower variation of 30%, and reagent (R4) containing 5 g hydrochloric acid with variation of 20% (minus) or 100% and 1000 g purified water with variation of 100% (upper) or 20% (minus) to obtain reagent combustible comprising universal bio-combustible or an additive different from non-self-degrading bio-combustible and additive which does not degrade engine component, and exist in market. The additive for explosion motor containing reagents including ethyl alcohol 96 degrees GL having alcoholic degree of 93.8 degrees INPM or 95.3 degrees GL having alcoholic degree of 92.8 degrees INPM at 20 degrees C, ethyl alcohol 77 degrees GL having alcoholic degree of 70 degrees INPM at 20 degrees C, 97% sodium hydroxide, 99.7% or more boric acid, hydrochloric acid and distilled or purified water, is produced from refined sunflower oil or any other type of vegetable oil or from seaweeds preferably without conservative.