In November 1st, 2015 "3M Latvia" issued certificate conforms that Troja SIA manufactured traffic signs, made with 3M reflective sheetings by application method:

• 3M Engineer grade 3200 series type RA 1
• 3M Engineer grade 3430 series (microprismatic) type RA 1
• 3M High Intensity 3930 series (microprismatic) type RA 2
• 3M Diamond grade 4000 series (microprismatic) type RA 3

and translucent film series:

• 3M EC Film, series 1170

complies to 3M technical requirements.

3M certificate of conformance (LAT): CERTIFICATE