What is the difference between TPO rolls and SBS rolls?

polypropylene (PP) and ethylene propylene diene monomer (EPDM) and other polyolefin elastomers.

base asphalt + SBS thermoplastic rubber modifier + reinforcing layer (such as polyester reinforcing layer).

is a synthetic polymer membrane based on plastic (resin).

is a rubber-modified asphalt-based waterproof membrane.

is usually a homogeneous single-layer structure, with a surface often white, gray, or other light colors.

is mostly a composite layered structure (asphalt layer + reinforcing layer), with a black surface covered with sand or PE film.

has excellent weather resistance, ozone resistance, and chemical corrosion resistance; it is environmentally friendly (weldable without open flame); its white surface reflects heat and provides insulation; the material does not absorb moisture.

has good elasticity, excellent low-temperature flexibility; good self-healing properties (the asphalt layer can heal small punctures); and strong adhesion to the substrate.

is hot air welding (automatic or manual welding gun).

is hot melt method (flame torch is used to heat the asphalt layer on the underside of the membrane until it melts).