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Published on Jan 25, 2010
Unique mold making process quickly generates 11,880 lightweight concrete panels and 1,981 posts to form a 3 mile (4.8 km) decorative wall that will provide safe and secure area for a resort in Cancun, Mexico. Lead Engineer, José Hormiga, is a material expert with years of experience matching the right material for a specific job. He chose Smooth-On's Rebound® 25 brushable silicone to make the molds for several reasons.
Rebound® 25 is easy to apply and cures quickly. Molds are used in production the next day. The rubber reproduced the detail of the bamboo perfectly. The detail was subsequently reflected in each and every concrete panel. Rebound® 25 is strong and stretchy so it can withstand the physical stress of demolding hundreds of highly detailed concrete castings. Rebound® 25 also withstands chemical attack from the GFRC.
Because finished panels needed to be stained, no release agent could be used. Rebound® 25 rubber releases GFRC castings without a release agent. Right to the Bottom Line; Mr. Hormiga states that Rebound® 25 mold rubber proved to be an excellent investment. The cost of the Rebound® 25 rubber relative to the number of castings taken from each mold was very low.