Patio-Block-Anti-Slip-Additive-200g-Ronseal-38224-p-Thompson-s-Patio-amp-Block-Anti-Slip-Additive-is-quick-&-easy-to-use-providing-extra-grip-to-patios-&-block-paving-This-Anti-Slip-Additive-should-be-used-in-conjunction-with-your-chosen-finish-of-Thompson-s-Patio-amp-Block-Paving-Seal-satin-or-wet-Look-this-SHOULD-NOT-be-used-with-Natural-Finish-p-p-Suitable-for-use-on-all-treated-patio-&-block-paving-including-flag-stones-granite-cast-limestone-&-sandstone-p-