FlareSeal MSP-0410 Mini-Split Pack — 1/4" & 5/8" Copper Clip-On Flare Gaskets for Leak-Free HVAC Connections

FlareSeal Model MSP-0410 is a clip-on, copper-engineered gasket system that creates a crush seal for 1/4" liquid and 5/8" suction mini-split flare connections to stop refrigerant leaks.

Designed for ductless mini-split HVAC systems (24,000–32,000 BTU / 3-ton) and other SAE 45° flare fittings, the MSP-0410 Mini-Split Pack provides a fast, field-friendly way to prevent or repair leaks at the flare joint. The seal’s multi-ring copper geometry with a leakproof coating compensates for vibration, alignment imperfections and light surface damage, delivering a durable crush-fit without re-machining or additional tools.

How does FlareSeal stop leaks on vibrating mini-split systems?

The multi-ring copper gasket is engineered to deform slightly under flange compression, maintaining contact even when the system vibrates. The full-metal base with a protective coating creates a barrier against refrigerant seepage where traditional flare fittings often fail.

• Multi-ring profile maintains seal under vibration and pressure cycling
• Coated copper resists small scratches and surface debris
• Clip-on design secures over the male flare for instant installation

Can I use MSP-0410 on both new and existing fittings?

Yes — the MSP-0410 is made to install on new assemblies or to repair an existing leaking flare without replacing the tubing or re-flaring. It clips onto the male flare and forms a crush-fit when the flare nut is tightened, saving time on service calls.

• Works on existing leaks to avoid costly rework
• Compatible with standard SAE 45° male/female flare joints
• Includes sizes for 1/4" liquid and 5/8" suction lines common on mini-splits

What HVAC components and applications is this pack suitable for?

Beyond ductless mini-splits, FlareSeal MSP-0410 fits many refrigeration and HVAC components that use SAE flare fittings. It’s useful on pilot lines, TXV connections, filter-driers, Schrader valve stems and other serviceable flare joints where a reliable crush seal is needed.

• Mini-split systems 24k–32k BTU (3-ton) with 1/4" and 5/8" lines
• Thermostatic expansion valves, filter driers and pilot lines
• Schrader valves—use with a brass cap to stop core leaks

How do I install FlareSeal MSP-0410 and what comes in the pack?

Installation is tool-light: clip the FlareSeal over the male flare, assemble the flare nut, and torque to normal specifications until the gasket crushes to form the seal. The Mini-Split Pack contains two 1/4" and two 5/8" seals sized for common mini-split fittings and is offered in larger counts for contractors who need multiples.

• Clip-on installation — no re-flaring required
• Pack includes (2) 1/4" and (2) 5/8" seals for typical mini-split installs
• Also available in 10-packs and variety containers for pro use

Who is this for? HVAC technicians, refrigeration service professionals and DIY installers who work on ductless mini-splits and other SAE flare-connected equipment will find MSP-0410 valuable. It’s built for field repairs, preventative installs on new equipment, and for technicians who need a compact, reliable solution to prevent refrigerant or gas leaks without replacing tubing or performing complex rework.