Waikato, without impressive flanker Jack Lam due to family reasons and four unnamed players who were demoted due to breaches of team protocol, hardly fired a shot in the first half - they didn't mount an attack in the home side's 22m territory until after the halftime hooter.
Even the massive Ben Tameifuna was neutralised by a Canterbury front row including the similarly big Paea Fa'anunu.
To make matters worse, centre and captain Jackson Willison centre and captain went off at halftime, but instead of folding, it was Waikato who started the second half with more intent.
Hooker Brayden Mitchell went over for a deserved try and Save Tokula would have followed suit but for a debatable forward pass.
However, the home side, aided by Slade, flanker Matt Todd, wing Patrick Osborne and midfielder Ryan Crotty, eventually cut loose.
Canterbury, on the hunt for their sixth consecutive title, are three from three this season and it's hard to see them threatened until they meet Wellington, also unbeaten so far, at the Cake Tin in three weeks.
Canterbury 47 (Milford Keresoma 2, Ben Funnell, Adam Whitelock, George Whitelock, Colin Slade, Patrick Osborne tries; Tyler Bleyendaal 2 pens, con; Slade 2 cons). Waikato 10 (Brayden Mitchell try; Wharenui Hawera con, pen).
HT: 21-3
Star man: Colin Slade added a touch of class and was instrumental in Canterbury's first three tries. Switched from fullback to first-five in final minutes.
Workhorse: Waikato hooker Brayden Mitchell was a standout for the visitors in the first half and scored a deserved try as his side struck first after the break.