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Ottoseal S70 Silicone Sealant designed for use with Natural Stone.

The Premium Silicone for Natural Stone

Available in 35 Colours. See Chart Below.

Sold in Box quantity (20 per Box)                 Delivery 3-4 working days

Ottoseal® S70 is a highly notch-resistant special sealant, which is "guaranteed" not to cause staining around the edges of the joint on marble, granite, sandstone and all other forms of natural stone. It is also perfect for applications in constantly wet areas and even under water, making it perfect for swimming pools.

After curing it remains elastic yet very hard wearing. Ottoseal® S70 has a fantastic ability to withstand the elements, it stays practically forever young against the sun, wind and rain.

Applications for Ottoseal S70 The Natural Stone Sealant:

  • Sealing and jointing on marble and all natural stone, for example sandstone, quartzite, granite, gneiss, porphyry etc in interior and exterior areas

  • Especially suitable for flooring applications

  • Movement-compensating bonding of natural stone on metal, e.g. stairs on a metal construction

  • Special sealant for underwater seals and joints in swimming pools, containers etc

Advantages and Benefits of Ottoseal S70

  • Neutral-curing RTV-1 silicone sealant

  • Guaranteed not to cause any migratory staining on natural stone

  • Very high crack and notch resistance

  • Contains fungicide

  • Non-corrosive

  • Available in 29 colours ex warehouse

  • Also available in "Structure" colours with a stonelike surface

  • UV resistant

  • Excellent weathering and ageing resistance

Standards and Approvals for Ottoseal S70

  • Tested according to ASTM C 1248 von DL Laboratories, New York


Otto-Chemie are a German Manufacturer of very high quality Silicones, Sealants and Adhesives. Founded in 1881, Otto-Chemie started as a manufacturer of putty. During the course of the next 120 Years it has transformed into a modern, high performance construction chemicals company.

Customers who have used this product have been impressed with it's high quality, workability and the range of colours.
















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