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Lanco Siliconizer is a thick, rubberized acrylic elastomeric roof coating sold in a 5-gallon pail. It forms a waterproof, weatherproof membrane that the maker says resists cracking, crumbling and peeling under joint movement, and its white finish reflects sun to lower interior heat. It suits flat and low-slope roofs, metal, concrete and similar substrates that need a seamless reflective coating rather than patches. Against solvent-based or silicone roof coatings, it is easier to apply and clean up with water, but it is not a walkable traffic coating and needs proper surface prep to bond.
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Buyers rate it highly and most praise how well it seals and how much cooler the space below feels after coating. Complaints center on surface prep and on coats that failed to bond where the roof was dirty or damp.
Lanco Siliconizer is a one-component, thick, styrene acrylic roof sealer. It is rubberized and elastomeric, and it comes in white.
Applied as directed, it forms a waterproof and weatherproof seal that adheres tightly to the surface. It does not crack, crumble or peel, even in severe weather or with total joint movement. The white finish reflects sun rays and reduces interior temperatures.