<p>The present study deals with the experimental investigation of the effect of the Sikadur-32 LP surface coating on the durability of borax-boric acid treated bamboo strips for up to a period of 125 days at ambient temperature in alkaline and water environments using the constant immersion test. About four hundred specimens were tested in five categories: non-coated ambient, non-coated alkaline, coated alkaline, non-coated water and coated water conditions, in which half of them were nodal and the remaining half were internodal. The tensile strength and modulus of elasticity were measured after 30, 70, and 125 days. Results revealed a progressive degradation in all cases, with non-coated samples retaining only 59–73% tensile strength and 53–58% modulus after 125 days. The coated samples demonstrated improved performance, retaining 69–81% tensile strength and 67–71% modulus. In all the cases, the internodal samples showed a 7–11% improvement in the strength retention compared to nodal samples. XRD confirmed crystallinity loss in non-coated bamboo after alkaline exposure, while the coating preserved the cellulose structure. FTIR indicated reduced lignin degradation in coated samples, and SEM revealed severe deterioration of parenchyma cells in samples immersed in the alkaline and water solutions, whereas samples in the ambient conditions retained their structural integrity. These findings highlight the effectiveness of Sikadur-32 LP coating on chemically treated bamboo in aggressive environments, making it a promising protective strategy for sustainable bamboo reinforcement applications</p>