Tries from Lewis Garrard, Ross Coghlan, Connor Lewis, Morgan Evans, Ben Stokes and Jacob Kenniford secured the woods' third bonus point win of the campaign.
The visitors could only muster a single penalty kick from Luca Natale paired with a singular try from Conal Jones.
Cwmbran snatched an early lead off the tee from Natale after Blackwood were penalised at the breakdown just inside their own half.
Blackwood responded with a try right in-front of the clubhouse through Garrard.
Some mighty phase play crept Blackwood to the visitors try line until Garrard sniped through a gap off a ruck to force his way over the whitewash.
The Blackwood pack were making a ferocious impact on proceedings with flanker Coghlan powering his way over from close range to further extend his sides lead.
With the score sat at 12-3 in favour of the hosts at the half time break the game was far from being over in terms of action and a firey second half was almost certain to unfold.
Blackwood were first to strike in the second half with a well worked set piece move from their backline.
A well timed pass from Scrumhalf Stokes found Kenniford who with a great combanation of handling and awareness lifted the ball to a looping Gleadall to put the flyhalf into open traffic.
Gleadall raced for the line before offloading to Lewis who crossed over under the uprights.
Cwmbran would become their own worst enemy with a wild pass gifting Blackwood another try.
A loose slung pass found the floor where winger Morgan Evans thumped the ball and gave chase.
The former footballer using his past skills to great affect sitting the ball up under the posts and giving Blackwood further breathing room on the scoreboard.
The visitors would reply with a try of their own Conal Jones breaking through the Blackwood defence and darting down to try and give his side some sort of inroad into the match.
Any hope of a Cwmbran comeback however were quickly put to bed with Ben Stokes scoring a lovely try fooling the Cwmbran defence.
After an initial break from Jack Morris down the wing the Blackwood attack was stopped just short but with a loose covering defence from the visitors Stokes went against the grain of play darting into the corner to seal the deal for Blackwood.
The home side would close out proceedings through some solo brilliance from Kenniford.
The fullback slotting in at scrumhalf before picking his line and racing to the line but was ankle tapped just short.
Despite his tumble Kenniford recovered and drove for the line using some great strong crossed over to push blackwood beyond the fourty-point mark.
Blackwood now sit top of the Division 2 East table unbeaten and five points clear.
The woods' next fixture is on the road against Gilfach Goch in the WRU Division 2 cup.
Written by Max Drinkwater-James
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