1.Water heater rubber is UV and chlorine resistant. 2.It is EPDM rubber mat heating,10 years life span 3.MOQ is 100 sets Water heater rubber1.Water heater rubber is made of EPDM,the warranty is 10 years.2.Solar Panel roll can be blacke,red colour also.3.Solar pool heating system is just for swmming pool,spa,ect4.Solar pool heater can be made as customer requirements.