Abstract: Gel fire extinguishing agent is a kind of water based extinguishing agent which could be used in forest fire fighting. Its adhesion performance is the key factor to ensure its effective adhesion on trees and its advantages of high water retention. And the adhesion performance is also important for fire fighting, cooling and reducing water loss. However, at present, the evaluation methods of the specific properties of gel fire extinguishing agents, especially the adhesion performance, are still lacking. In this paper, two methods were proposed to evaluate the adhesion performance of gel fire extinguishing agents. And the adhesive properties of five commercially available gel fire extinguishing agents were tested and compared to verify the effectiveness and feasibility of the methods. According to the simulation degree of forest scene with two evaluation methods, the adhesion performance evaluation method of gel extinguishing agent based on wood dowel tree was selected. Through the test, the adhesion performance level of commercially available gel fire extinguishing agents was mastered. This study will provide technical support for the performance comparison of gel extinguishing agent products, the study of fire extinguishing mechanism and the development of new products.

Key words: gel fire extinguishing agent, adhesion performance, evaluation method