Butaclor MA 326 Polychloroprene rubber Polimeri Europa Rubber - Elastomer >> Chlorinated rubber / Chloroprene, CR ADHESIVE Polychloroprene Rubber [CR ] Butaclor MA 326 Medium rate of crystallization. Adhesives Particularly suitable for direct dissolution. Polychloroprene rubber (CR). Used in adhesives. Possesses medium rate of crystallization. Suits for direct dissolution.