Performance parameter:
number	item				index
					B	S	J
1	Rigidity, HA				60±5	60±5	60±5
2	Tensile strength ,MPa                   ≥				15	12	10
3	Snap and elongation,%≥				380	380	300
4	transmutation		70×24h,%        ≤		35	35	35
			23×168h,%          ≤		20	20	20
5	Tear strength21,KN/m                                ≥				30	25	25
6	Brittleness temperature,                                  ≤				-45	-40	-40
7	Air aging31	70×168h		Rigidity, HA      ≤	8	8	--
				Tensile strength,MPa          ≥	12	10
				Snap and elongation,%          ≥	300	300
		100×168h		Rigidity, HA      ≤	--	--	8
				Tensile strength,MPa          ≥			9
				Snap and elongation,%          ≥			250
8	Ozone ageing 50pphm: 20%,  48h				2grade	2 grade	0 grade
9	Rubber and metal bonding				In vivo sections flexibility
remark
1 rubber and metal bonded items apply only to the edge of waterstop which include steel.
2 demand and supply can discuss about the question if there is other special needs, such as mold assessment test, but the anti-mildew properties should be equal or higher than two grade.