Viacryl®-Desmodur (polyurethane)
Bourges, Chartres: Viacryl® with Desmodur, applied in 1981 by Mauret studio;
80 % acrylic resin (Viacryl® VC 363 at 65 % in ethyl glycol acetate) + 20 % aliphatic isocyanate (Desmodur N75
at 75 % + 25% mixed 1:1 xylene and ethyl glycol acetate).
Canterbury: the coating of the external side is very similar to Viacryl®, the internal coating is a mixture of Viacryl®, Primal® and another polymer.

Paraloid® B72
Copolymer of methyl acrylate and ethyl methacrylate in solution with Toluene. Paraloid® was not involved in the samples, but used in Canterbury and Klausen in comparison to Ormocer® and SZA.

Saint-Etienne Cathedral, bay 4
Bourges (France)
 

Saint-Etienne Cathedral, bay 37
Chartres (France)
 

Saint-Etienne Cathedral, bay 42
Chartres (France)

Viacryl® protective system on the
whole external side (glasses and
leads)
 

Viacryl® consolidant (internal)

 

Viacryl® consolidant (internal)

Canterbury Cathedral, SXXVIII
(United Kingdom)
 

Saint-Julien Cathedral, Bay 16
Le Mans (France)

a similar Viacryl®-coating used on external surface, on internal side
coating is a mixture of Viacryl®,
Primal® and another polymer

Viacryl® coating on external side and
Viacryl® consolidant on internal side