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Lanco Siliconizer is a thick, rubberized acrylic elastomeric roof coating sold by the gallon in white. It forms a waterproof, weatherproof membrane that stays flexible through joint movement and reflects sun to lower interior heat. It suits flat and low-slope roofs, metal, concrete and masonry that need a seamless coating rather than patches. Against cheaper asphalt-based coatings it is more elastic and reflective, but it is a coating, not a repair for failed flashing or ponding. Owners rate it well overall, with complaints centered on coverage and surface prep.
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Lowest price we've seen: $39.98 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Buyers rate it 4.3 out of 5 and mostly praise its thickness, adhesion and cooling effect. Complaints focus on how far a gallon goes and on coating failures tied to poor surface prep.
Lanco Siliconizer is a one-component, thick, rubberized roof sealer made from styrene acrylic. It is an elastomeric formula that comes in white.
When applied as directed, it forms a waterproof and weatherproof seal that adheres tightly to the surface. It does not crack, crumble or peel in severe weather or with total joint movement.
The white finish reflects sun rays and reduces interior temperatures.
