Foam rubber strip, sponge rubber strip Features: Made of EPDM (ethylene propylene diene monomer) as raw material, the surface is smooth and delicate, with good resilience, uniform foaming, first-class waterproof performance, ozone resistance, aging resistance, and excellent solvent resistance. EPDM foam series products: 1、 Polyethylene perforated foam rubber expansion joint board (filling board, sealing board) （1） Product Features Corrosion resistance, aging resistance, high and low temperature resistance+80 ℃~-45 ℃, no flow, no deformation, no brittle fracture, long service life. Featuring an independent perforated bubble structure, the specially designed joint board has a honeycomb shaped appearance with evenly distributed holes. It can be tightly bonded and integrated with cement/sealant without the need for roughening, adapting to natural expansion and contraction changes and enhancing the sealing and sealing effect of the joint. （2） Application scope of the product It can be widely used in various concrete waterproofing joint projects such as machinery, doors and windows, curtain walls, rivers, dams, ports, docks, underground tunnels, water conservancy and power, airports, bridges, etc. （3） Product usage instructions During construction, this product can be used in various ways depending on the situation. Vertical waterproof joints, horizontal waterproof joints, and other special joints are used.