Wales winger Paul Morgan scored a hat-trick as the Welsh side crossed for 13 tires at the Brewery Field.
The Crusaders' fourth win out of four in the competition came in front of a crowd of 1,421 in Bridgend.
Next week, the Crusaders are home to Lokomotiv Moscow in the Powergen Challenge Cup.
Celtic Crusaders coach John Dixon:
"This was a great warm up for the Russian game. I was exceptionally pleased all aspects of our ball control and the performance in our defensive line. "Our aim today was to put on a display that would bring the fans back again next week against Moscow and I think we've done that.
"We're excited to have the Russians here next week. I don't know anything about them apart from how well they did in Russia last year so I know they'll give us a good game."
Celtic Crusaders: Tony Duggan, Carl De Chenu, Geraint Davies, Damien Quinn, Paul Morgan, Luke Young, Jace Van Dijk, Ryan Barton, Michael Ryan, Phil Cushion, David Simm, Matt Jobson, Dean Fitzgerald.
Subs: Karl Hocking, Dean Scully, Carle Ellis, Scott O'Kelly.
London Skolars: Dean Martin, Mario Du Toit, Mike Castle, Ash Tozer, Corey Simms, Frank Reid, Nathan Meischke, Rubert Jonker, Gareth Honor, Bobby Wallis, Dave Ellison, Matt Pitman, Ben Joyce.
Subs: Chris Shears, Josh Garden, Richard Coatelan, Dave Roberson.
MMIX
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