Zen Vents 1pc Precast concrete louver blocks hard plastic mold breeze block design resuable

Precast concrete louver blocks hard plastic mold breeze block RE USABLE MOLD 1000XPrecast Concrete Louver Vent blocks provide not only beauty and air vent ventilation while filtering dust , leaves, etc. but practical protection while allowing light and air into the functional space. They are especially useful in cutting heavy winds without blocking all circulation of air for ventilation.This mold are hard plastic and easy to use. just paint or spray the insides of of the mold with concentrated release agent (sold here also LINK: https://s.lazada.com.ph/s.ZZ1iUcto prevent concrete from sticking to the mold and for easier demolding, then pour fresh concrete 1:1 ratio use fine sand, then demould by hand slowly after 24-48hrs, do not dry the precast under the sun. better cover it with cellophane or card board after pouring and leveling the fresh concrete.NOTE: you can super plasticizer powder 1% estimate only to the TOTAL aggregate and Fiber Mesh for Extra Strength of the louvers. sold here onlineFiber Mesh link https://s.lazada.com.ph/s.ZZ1iYXSuper Plasticizer tibay mix product link: https://s.lazada.com.ph/s.ZZ1i3U