Washable Rigid Foam is chemically inert to most of the chemical. Diana Foams Pvt. Lld. Manufactures Washable Rigid Foam. Diana Foams Pvt. Lld is an ISO 9001:2000 awarded company that also manufactures wide range of profiles and foams. Washable Rigid Foam is insoluble in water. It is washable, hygienic and vermin free. It can be washed in hot water for sanitization. It can be disintegrated and regenerated. It is used in Fibre Boat, Panel Partitions.