What are playground safety mats and tiles made of?
Playground safety tiles combine robust rubber granulate with a polyurethane binder to create a surface that cushions impact, prevents slipping, and performs equally well indoors and out. Understanding the layers and materials helps you select the right product for your specific application and fall heights.
The foundation layer uses recycled rubber granulate (ELT), cleaned to remove contaminants and graded by particle size. The granule texture—ranging from fine to medium grain—affects both the visual appearance and the mechanical performance of each tile. Finer particles create a denser, smoother aesthetic; coarser granules provide a more textured surface with different stress characteristics.
The binder system relies on polyurethane (PU), a permanently elastic synthetic material that bonds the granulate particles together. Polyurethane remains flexible across temperature swings, resists UV degradation, and creates strong adhesion without chemical outgassing or health concerns. The binder itself can be colourless (yielding grey or neutral tones) or pigmented to achieve vibrant colours, whilst maintaining low emissions standards throughout its service life.
Many products feature an upper wearing surface of EPDM rubber granulate, chosen for its exceptional UV stability and colour-fastness. EPDM granules are through-dyed—colour penetrates the entire particle—so wear patterns do not expose an artificial-looking undersurface. Pure EPDM products use UV-stabilised polyurethane binder to ensure the surface retains its integrity in direct sunlight without fading or brittleness.
Construction typically employs either a single homogeneous layer or a two-layer assembly. Single-layer tiles work well for many indoor and lighter-use outdoor applications. Two-layer variants position a resilient ELT base for shock absorption beneath an EPDM wearing surface for colour and abrasion resistance. Some products consist entirely of EPDM granulate throughout, offering excellent colour permanence at a higher material cost.
The underside features a structured profile—nodules, studs, or small dimples—that breaks the seal between tile and substrate. This design allows water to run away following the gradient rather than pooling beneath the surface, and it permits air circulation underneath, preventing moisture entrapment and extending tile longevity.