Fixing primer, based on resins in aqueous emulsion. Suitable as a penetrant in "B" and "D" encapsulating coatings. AMIANT STOP is an elastomeric penetrator suitable for the reconditioning of concrete products in cement-asbestos, promoting the encapsulation of fibers, in compliance with Law No. 257 of 27/03/92 and subsequent Ministerial decrees. Caps "B" and "D" encapsulating coatings.