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Cornerstone Marine P30 Mortar

Cornerstone Marine P30 Mortar

Cornish Lime

£19

Price read from Cornish Lime on 2026-10-15. Check before buying.

A ready mixed natural cement, water-resistant mortar suitable for aggressive marine environments that require a balance between strength and the degree of impermeability. Available in a 25kg bag. Cornerstone Marine P30 is a dry ready mixed natural cement mortar for marine building and pointing work of water-bearing masonry above and below the water level in aggressive marine environments. Available with two finishes, a coarse tan finish as standard or medium by request. Manufactured by Cornerstone using Prompt Natural Cement and natural sands to create a high-performance water-resistant mortar

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