Good Afternoon Mark
Thank you for your question.
You can apply Stormdry Masonry Protection Cream to a substrate which has a Lime mortar, as the mortar will still have a sand content, which Stormdry will need in order to bond correctly. It is not suitable for pure Limestone, in this instance we advise using our Raincheck LS for pure Limestone substrates.
Any further questions please give us a call on 01403 210204.
Kind regards
Jack
Safeguard Europe Ltd
Can stormdry be applied to a house built using a lime mortar ?