This was a strange watch at times, with dominance from Saints and indiscipline and handling errors from Salford framed by patches where the hosts might have made more of their possession.
Yet they were on the back foot early, with the visitors racing into a 20-0 lead in 25 minutes, with tries from Sironen, Alex Walmsley and the first two of a quartet from Feldt.
The hosts gained a foothold of sorts after cutting out errors from that point to the half-time siren, but it did not translate into points and in the second half they were blown away.
The understandable frustration spilled over into a couple of flashpoints after Robertson and Feldt extended the lead to 30-0.
Saints’ Walmsley and Matty Foster sparked a mass confrontation around the hour mark and the match simmered from there to the hooter.
With the club still operating under salary-cap restrictions, ongoing uncertainty over the ownership and this being a 13th defeat in 14 matches, Salford fans deserve credit for sticking behind their side.
At the close, Rowley’s team received notable recognition from the stands as the home support acknowledged that effort levels did not dip despite the scoreline.
Yet warm applause will not move them up the table and ultimately once again they found an opposition in St Helens too slick in the crunch moments up front and too solid in defence.
Robertson went over for a second just after the hour, Owen Dagnall, on his debut with a first Super League try, added another, and Feldt came back for his fourth to hammer yet another nail into Salford’s season.
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