Hi, HY270 as mentioned is the preferred choice in Stone base materials such as Sand, York, Bath etc whilst the RE500 is more appropriate for 'rock' like materials such as Granite. Please also note that due to the RE500's viscosity it cannot be used in applications where the sieves are required.
Thank you for your question. The preferred solution for anchoring into masonry and natural stone would be a chemical anchor – the HY270 system was developed specifically for masonry applications in solid or hollow base materials (Sieves required) and can be utilised for internal or external applications.
The performance of any anchoring system into stone or masonry is very much limited by the base material itself and given the huge variation in types, strength and size it is impossible to test everyone.
The HY270 was tested in the largest range of base materials of any of our anchors but there is no published data for natural stone. When you look at the published data, (attached), the minimum embedment tested is 50mm in a masonry unit not less than 100mm thick.
Due to the nature of the application, suitability testing in the base material should be carried out to establish allowable resistances.
The Construction Fixings Association (www.the-cfa.co.uk) has a guidance note on site testing construction fixings, which is a good reference for this topic, as well as huge amount of other information concerning the design and specification of construction fixings.
