Setup Si-Tech ULTIMA system kit

Cold-water UK diving — North Sea wrecks at 8°C, inland quarries in winter, Scottish sea lochs below the thermocline — demands a wrist sealing solution that holds under pressure and survives repeated glove changes without exposing bare skin to freezing water. DTEK S.r.l., the Verona-based drysuit manufacturer, offers the Si-Tech ULTIMA ring system as a factory-fitted option on every new drysuit order. DTEK technicians bond the suit rings directly into the wrist cuff geometry of your suit before dispatch, ensuring correct alignment and a lasting seal that no field installation can replicate.

Technical specifications

• DTEK reference: 26147
• Kit contents (installed): 2 silicone suit rings (bonded to drysuit cuffs), 2 glove rings (fitted to gloves), O-rings, 2 silicone protective covers, lubricant, fitting tool
• Ring interface: Si-Tech oval standard — compatible with Si-Tech ANTARES QCS, WP FlexLock, and Waterproof ISS systems
• Glove engagement: single rotational movement + triple-confirmed click (audible, visual, tactile)
• Size range: XS to 2XL — sizes 3XL and 3XL/t+ require Si-Tech Quick Glove system (wider wrist ring profile)
• Wrist integrity: silicone cuff remains sealed during glove fitting, removal, and in the event of accidental glove release underwater
• Kit weight: approx. 500 g
• Not included: dry gloves, drysuit
• Installation: DTEK workshop, Verona, Italy — return shipping approximately €50 maximum, shareable across multiple orders

Recommended uses

The ULTIMA system is aimed at divers who treat hand protection as non-negotiable: UK technical divers working North Sea wrecks and coves in Scapa Flow where water temperature falls to 7–9°C year-round, drysuit instructors running back-to-back student dives who need rapid pre-dive kit checks, and underwater photographers who require gloves in place before splash-down without exposing their hands to air temperature at the surface. Once factory-fitted, the ring system allows glove rings to be pre-mounted on gloves at home; at the dive site, engagement takes seconds even with neoprene dry glove liners on. The British Sub-Aqua Club (BSAC) provides comprehensive technical guidance on drysuit techniques for cold-water diving in British waters.

Key strengths

• Zero flood pathway on glove separation: the silicone suit ring seals the wrist independently of the glove ring — if a glove detaches underwater, the suit stays dry, a critical margin when the nearest surface is 30 metres up in a North Sea wreck passage
• Three independent connection verifiers: audible click, visual alignment mark, and tactile engagement feedback act independently — each can be verified alone if one sense is impaired (numb fingers, low visibility, thick liner gloves)
• Open compatibility with Si-Tech oval ecosystem: suit rings once fitted accept gloves from multiple brands using Si-Tech oval or WP FlexLock — glove choice is not locked to a single manufacturer, protecting the investment over the suit's lifetime
• Factory build quality, not field retrofit: DTEK engineers fit and test the rings as part of the suit's production at Verona, maintaining full manufacturer warranty on the suit-plus-system assembly

Warranty and product information

The Si-Tech ULTIMA ring system is a diving accessory not subject to EN PPE category III certification. DTEK S.r.l. covers the installation against manufacturing defects under the warranty terms of the drysuit ordered simultaneously. O-rings should be replaced after 30 months or when cracking or wear is visible. For retrofit installation on an existing drysuit, contact DTEK directly at dtekgroup.net — Dry Suit Repair. Return shipping to Italy applies (approx. €50 maximum, shareable). Compatible dry glove systems overview: sitech.se — Dry Gloves Solutions.