Sika 1 Waterproofer 25L is a waterproofing additive that is used in concrete and mortar. Sika 1 waterproofer contains complex colloidal silicates which swell and block water penetration into pores of the sand, cement, renders or screeds and provides an effective waterproof barrier.
Available in 5ltrs and 25ltrs. With a dosage of 1.5l per bag of cement