This work studies the properties of Linear Low-Density Polyethylene (LLDPE) doped with strontium aluminate at concentrations of 3% and 15% m/m with possible applications in road safety products manufactured by rotational molding. To this aim, the design and manufacture of a prototype part and the mold for the rotational molding process were carried out. Single-layer parts as well as bilayer parts were manufactured, subsequently, samples of the obtained pieces were subjected to Fourier Transform Infrared Spectrometry (FTIR), Scanning Electron Microscopy (SEM), X-ray Diffraction Analysis (XRD), UV-VIS spectrometry and photoluminescence measurements. The mono-layer and bilayer samples with 15% m/m of strontium aluminate showed the highest decay luminescence times -between 81 h and 92 h-. In the UV-vis fluorescence test, the bilayer piece with 15% m/m of additive showed the highest absorption intensity during the excitation process. The SEM images showed the external surface and the cross section of samples. In conclusion, the rotomolded LLDPE with 15% w/w of strontium aluminate doping could be used as a photoluminescent material for road safety products.