Ace Roto-Mold (Den Hartog)
Rotationally molded polyethylene tanks, 10 to 15,500 gallons, with a real ~200-chemical resistance chart and quantified ESCR stress-crack methodology.
What LibertyCES specifies from Ace Roto-Mold
A real ~200-chemical resistance chart, tested at multiple concentrations — including the finding that polyethylene itself becomes non-resistant at 98% sulfuric acid.
Patent 9,162,816, EPDM elastic seal standard between primary and secondary tank walls, 16" vented lid standard.
Cross-linked polyethylene construction — the explicit engineered exception to the general "no fuels in polyethylene" rule.
Frequently Asked Questions
At what sulfuric acid concentration does polyethylene fail?
Ace Roto-Mold's own chemical resistance chart rates polyethylene as chemically "Not Resistant" at 98% concentration and in fuming form — a concentration-driven material failure independent of temperature, more precise than a simple temperature-ceiling framing.
What is ESCR and why does it matter for a chemically "resistant" tank?
Environmental Stress Crack Resistance (ESCR) is a mechanically distinct failure mode from chemical dissolution — a chemical can rate "Resistant" on the compatibility chart and still cause stress cracking at fittings, bands, and tie-down lugs under mechanical load and elevated temperature.
Can polyethylene tanks store fuel?
Standard LPE tanks are not recommended for fuels or solvents, but Ace Roto-Mold's dedicated Fuel Tanks (6 and 12 gallon) use cross-linked XLPE construction specifically engineered and rated for gasoline/diesel contact — construction type, not the polyethylene family broadly, determines fuel compatibility.