Butaclor MA 427 Polychloroprene rubber Polimeri Europa Rubber - Elastomer >> Chlorinated rubber / Chloroprene, CR ADHESIVE Polychloroprene Rubber [CR ] Butaclor MA 427 Fast rate of crystallization. Adhesives Particularly suitable for direct dissolution. They can be used combined with Butaclor MA 32 similar grades in the medium range of crystallization rate Polychloroprene rubber (CR). Used in adhesives. Possesses fast rate of crystallization. Can be used combined with medium crystallization CR. Suits for direct dissolution.