Puerta de Alcalá, Madrid

Soudal Silirub MA was used in the restoration of the roof of the historic Puerta de Alcalá monument in Madrid, a UNESCO world heritage site. Silirub MA was tested extensively prior to being used in the project.

Silirub MA is specially formulated for sealing applications with natural stone substrates to ensure it will not stain the stone itself, staining can occur when using silicones on porous substrates causing a shadow, or wet looking area next to the sealant.

Silirub MA is a low modulus, neutral curing silicone, available in a wide range of colours to match natural stone substrates and also in translucent. The sealant is free of MEKO and also incorporates a biocide that delays the appearance of fungi and mould. In addition it meets the requirements of FDA code 21 §177.2600 (e)+(f) so can be considered as food safe. Silirub MA conforms to ISO 16938-1 (Testing for staining on natural stone by sealants).