The ULMA D100 is a neutral polymer concrete linear trench drain channel with stepped edges for lateral protection. The polymer concrete material allows the channels to have higher impact resistance. It also provides a smooth channel surface with a near zero absorption rate which increases the flow rate, versus standard concrete which has a 5-10% absorption rate. The ULMA D100 channels are resistant to 59 different chemicals. (Not rated for sanitary or high-temp applications.)