This weekend, the spell continues at Blobfest, the annual three-day festival in Phoenixville that showcases the movie, the Colonial Theatre where it was filmed and other blob-based things.
The event includes a street fair, a stage show, and screenings of "The Blob" featuring Steve McQueen in his first starring role. The festival highlight is Friday night's "Run Out," a re-enactment of a scene in the movie when the Colonial Theatre audience flees the blob.
Tickets for the run-out and the stage-show that precedes it sold out in three hours.
On the theater's second floor, the Shanks will be stationed with an exhibit featuring the Union Carbide silicone monster that Wes Shank purchased from the movie's director Irvin "Shorty" Yeaworth.
"I wanted to save it for posterity," said Shank, 67, a furniture salesman and movie memorabilia collector. "At first, said it's not for sale, but I kept at it and in November of 1965, I came home with the can."
Shank first saw "The Blob" as a teen at the Suburban Theater in Ardmore. He had developed an interest in horror, fantasy and sci-fi movies from reading the "Famous Monsters of Filmland" magazine.
In the darkened theater, Shank read the credits and saw "Valley Forge Films."
He looked up the company, found it in Chester Springs and called. Yeaworth, who owned and operated the studio with his wife Jean, answered the phone and agreed to a tour.
While walking through the studio, Irvin Yeaworth stopped and pointed to can in a dark corner.
"The blob is in there," the director said.
Yeaworth, who died in 2004, took off the lid.
"There it was - a real movie monster," Shank said.
The red sticky Silly Putty-like mass didn't look as if it could convincingly devour a movie theater audience. But Yeaworth and his crew used extreme close-ups of the 2-gallon silicone blob on miniature sets to terrifying effect.
Yeaworth sold the blob silicone because he was short of money, said Jean Yeaworth, who edited script for the movie, which was filmed for $120,000.
"We didn't have money for Christmas presents for our kids," said Jean Yeaworth, 87, who now lives in Summerville, SC.
The Yeaworths spent much of their career making religious films. "The Blob" was one of only of few forays into mainstream movies.
Those 1950s features helped set Shank on a path to becoming a movie memorabilia collector.
"The worlds that don't exist were an escape for me," said Shank. "It helped me through my teenage years. I was very shy. I found my pleasure in movies. They gave me comfort."
Shank owns tens of thousands of original posters, models, costumes, miniature sets, books and figurines.
Shank's collection includes a flying saucer and force field from "Forbidden Planet," a bust of a "lawgiver" featured in "Planet of the Apes," and a costume of an Emerald city-resident from "The Wizard of Oz." He also has an original door from the Colonial Theater that was auctioned when the movie house underwent renovations.
Shank has acquired his collection from auctions, film conventions and through trades and sales with other collectors. His memorabilia has been exhibited at museums including the Franklin Institute and he has given talks before groups including the Academy of Motion Picture Arts and Sciences.
As he gets older, Shank is selling off portions of the collection, but he expects to pass down most of it, including the man-eating mass, to his children.
"Our boys call the blob, their adopted brother," said Judi Shank, 66.
On Friday, the Shanks will set up their exhibit at Blobfest for their 12th straight year.
But the couple doesn't have the only bit of the silicone blob.
Jean Yeaworth has a keepsake piece of the red monster in a jar at her South Carolina home.
Contact Kristin E. Holmes at 610-313-8211 or firstname.lastname@example.org.