ULTRA-HYD — hydraulic fluids engineered for performance, safety and sustainability.
The ULTRA-HYD range represents Rock Oil's commitment to performance, safety and sustainability across hydraulic applications. From fire-resistant and food-grade systems to high-viscosity and biodegradable fluids, this portfolio offers tailored solutions for demanding industrial environments.
Whether operating in extreme temperatures, cleanrooms or ecologically sensitive areas, ULTRA-HYD fluids are formulated to protect equipment, reduce downtime and meet the highest technical and regulatory standards — spanning mineral oils, high viscosity index fluids, zinc-free options and food-grade variants.
Detergent/dispersant hydraulic oil for wet, dirty or contaminated systems
Detergent and dispersant additives keep systems free of sludge, varnish and deposits • Emulsifies water contamination while maintaining anti-wear and anti-corrosion protection • Prevents stick-slip under load • DIN 51524 Part 2 (HLPD) • ISO 11158 (HM) • ISO 6743/4 (HM)
Long-life Group II mineral hydraulic oil with extended drain capability
5,000-hour TOST life — over 4x conventional mineral oils • High purity Group II base oils • ISO cleanliness 21/19/16 or better • Parker Denison HF-0 • Eaton 03-401-2010 • Bosch Rexroth RD90220, RD90235, RD90245 • DIN 51524 Part 2 • ASTM D6158 HM • MAG IAS P-68, P-69, P-70 • GM LS-2 • JCMAS HK • SEB 181222 • U.S. Steel 126, 127 & 136 • ISO 11158 HM
Viscosities: ISO 10, ISO 15, ISO 22, ISO 32, ISO 46, ISO 68, ISO 100, ISO 150
Zinc- and ash-free hydraulic fluid for environmentally sensitive operations
Zinc-free, ashless formulation • Compatible with silver and yellow metal components • TOST life over 2,000 hours • ISO cleanliness 21/19/16 or better • Cincinnati Milacron P-68, P-69, P-70 • DIN 51524 Part 2 (HLP), DIN 51506 VDL • Sperry Vickers I-286-S • AFNOR NF E 48-603 (HM)
Zinc-free, long-life hydraulic fluid built on Group II base oils
Over 10,000-hour TOST life • 1,500 hours in the A2F10 pump test (3x the 500-hour benchmark) • Up to 63% lower water acidity and 36% less sludge than other zinc-free fluids • ISO cleanliness 21/19/16 or better • Bosch Rexroth RDE 90235, 90245 • Parker Denison HF-0, HF-1, HF-2 • Danfoss (Eaton) 03-401-2010, E-FDGN-TB002-E • JCMAS HK P041 • GB 11118 L-HL, L-HM • Swedish Standard SS 15 54 34 • US Steel 126 • Cincinnati Milacron P-68, P-69, P-70 • DIN 51524 Parts 1 & 2 (HLP) • ISO 11158 HM • ASTM D6158
PAO-based, NSF H1 registered hydraulic fluid for extended service intervals
Polyalphaolefin base fluid • Operating range -60 to +170°C • Superior thermal and oxidative stability and cold-start behaviour • NSF H1 Registered • All ingredients FDA-listed • GMO-free formulation
ISO 6743-4 HFDU • ISO 12922 • >60% biodegradable (OECD 301B) • Environmentally Acceptable Lubricant per the 7th Luxembourg Report • Excellent lubricity and fire resistance
ISO 6743-4 HFDR • FM Approved • Self-extinguishing with excellent fire resistance and high lubricity • High thermal stability for extreme risk applications
>60% biodegradable (OECD 301B) • Viscosity index 187 • Mineral-oil-like wear protection with corrosion protection • ISO 15380 (HEES) • DIN 51524 Part 3
Depending on the range, Rock Oil products are available in multiple sizes, including 400ml aerosols and 1L / 4L / 5L / 20L / 210L / bulk containers. Full product data sheets and health and safety information are available on request.
support@roi.com.sg +65 6978 6809
All products and information are correct at the time of publication. The company reserves the right to change formulations and specifications without prior notice. REF /ULTRA-HYD/E25
