A glass strand comprising a coating layer, characterized in that said layer comprises: - a polymer chosen from the group consisting of vinyl acetate/vinyl chloride copolymers, polyvinyl chloride and polyvinylidene chloride, and - a silane of following formula: in which: • R 1, R 2 and R 3, which are identical or different, represent: - a C 1 -C 6 alkyl group, - a C 2 -C 6 alkenyl group, - a C 2 -C 6 alkynyl group, - a C 6 -C 10 aryl group, - a hydroxyl group, - a C 1 -C 6 alkoxy group, - a C 6 -C 10 aryloxy group, - a C 1 -C 6 acyloxy group, - a C 2 -C 7 alkylcarbonyl group, at least two of the R 1, R 2 and R 3 groups representing a hydroxyl group or an alkoxy group, and • R 4 represents: - a group including at least one epoxy functional group, - an optionally substituted aryl group, - a halogen atom or a group carrying at least one halogen atom, in particular a fluorine atom, - a group including at least one aldehyde functional group, - a group carrying at least one functional group including a phosphorus atom, - an acryloyloxy or methacryloyloxy group, said group carrying the abovementioned functional groups being a C 1 -C 18, preferably C 1 -C 8, carbon-based group which can comprise at least one oxygen heteroatom. - a polymer chosen from the group consisting of vinyl acetate/vinyl chloride copolymers, polyvinyl chloride and polyvinylidene chloride, and - a silane of following formula: in which: • R 1, R 2 and R 3, which are identical or different, represent: - a C 1 -C 6 alkyl group, - a C 2 -C 6 alkenyl group, - a C 2 -C 6 alkynyl group, - a C 6 -C 10 aryl group, - a hydroxyl group, - a C 1 -C 6 alkoxy group, - a C 6 -C 10 aryloxy group, - a C 1 -C 6 acyloxy group, - a C 2 -C 7 alkylcarbonyl group, at least two of the R 1, R 2 and R 3 groups representing a hydroxyl group or an alkoxy group, and • R 4 represents: - a group including at least one epoxy functional group, - an optionally substituted aryl group, - a halogen atom or a group carrying at least one halogen atom, in particular a fluorine atom, - a group including at least one aldehyde functional group, - a group carrying at least one functional group including a phosphorus atom, - an acryloyloxy or methacryloyloxy group, • R 1, R 2 and R 3, which are identical or different, represent: - a C 1 -C 6 alkyl group, - a C 2 -C 6 alkenyl group, - a C 2 -C 6 alkynyl group, - a C 6 -C 10 aryl group, - a hydroxyl group, - a C 1 -C 6 alkoxy group, - a C 6 -C 10 aryloxy group, - a C 1 -C 6 acyloxy group, - a C 2 -C 7 alkylcarbonyl group, at least two of the R 1, R 2 and R 3 groups representing a hydroxyl group or an alkoxy group, and - a C 1 -C 6 alkyl group, - a C 2 -C 6 alkenyl group, - a C 2 -C 6 alkynyl group, - a C 6 -C 10 aryl group, - a hydroxyl group, - a C 1 -C 6 alkoxy group, - a C 6 -C 10 aryloxy group, - a C 1 -C 6 acyloxy group, - a C 2 -C 7 alkylcarbonyl group, • R 4 represents: - a group including at least one epoxy functional group, - an optionally substituted aryl group, - a halogen atom or a group carrying at least one halogen atom, in particular a fluorine atom, - a group including at least one aldehyde functional group, - a group carrying at least one functional group including a phosphorus atom, - an acryloyloxy or methacryloyloxy group, - a group including at least one epoxy functional group, - an optionally substituted aryl group, - a halogen atom or a group carrying at least one halogen atom, in particular a fluorine atom, - a group including at least one aldehyde functional group, - a group carrying at least one functional group including a phosphorus atom, - an acryloyloxy or methacryloyloxy group,