Buna-N O Ring Splicing Kit with 10 Rubber Strips - 70A Nitrile

Our review of this Buna-N O ring splicing kit finds it best suited to DIY mechanics, plumbers and boat owners who need custom seals without buying many preformed rings. The kit's single biggest advantage is its completeness: 10 nitrile rubber strips in multiple diameters, two length options, glue, a splicer and cutting knife all in a compact storage box, so making a precisely sized O ring is possible in minutes rather than hours. For anyone who regularly repairs valves, fuel fittings or hydraulic seals, the kit saves time and eliminates repetitive trips for the right O ring.

Key Features

• Complete kit: contains 10 rubber strips, glue, a splicer, a knife and gloves so users can make O rings on site without extra tools.
• Versatile sizes: strip diameters from 0.06 in to 0.28 in cover a wide range of seal cross sections for small plumbing and mechanical repairs.
• Two length options: each strip is offered in 1 m and 2 m lengths, giving flexibility to create multiple O rings or longer runs without waste.
• Durable material: made from nitrile with a 70A durometer, the material offers strong resistance to oils, fuels and abrasion for robust sealing.
• Organized storage: the included storage box keeps strips and tools orderly and ready for workshop or field use.

Who It's For

This kit is ideal for automotive hobbyists, small engine repairers, marine owners and maintenance technicians who need to fabricate or replace O rings in the field. The nitrile strips work well where resistance to petroleum, vegetable oils and many solvents is required, and the 70A hardness balances elasticity with compression resistance.

It is not the best choice for prolonged outdoor UV exposure or for applications where ozone or sunlight will directly contact the seal; nitrile degrades under those conditions. Users needing specialized elastomers for extreme temperatures or chemical exposure should look for purpose-made materials instead.

Pros & Cons

Pros

• Wide range of strip diameters lets you match cross section to existing O rings for a proper seal.
• Included glue, splicer and knife make the kit immediately usable out of the box.
• Nitrile 70A offers strong oil and fuel resistance suitable for most automotive and plumbing needs.
• Compact storage box keeps parts organized for workshop or onboard use.

Cons

• Nitrile is susceptible to ozone, UV and weathering, so longevity outdoors may be limited without protection.
• The kit uses standard nitrile only, so it is not suited for every aggressive chemical or extreme temperature application.

Specifications

Our Verdict

This Buna-N splicing kit is a practical, cost-effective solution for anyone who needs to produce O rings on demand. It provides the essential tools and a useful range of nitrile strip sizes so routine repairs and custom seals can be made quickly. While not intended for long-term UV-exposed or highly specialized chemical environments, its versatility and ready-to-use components make it good value for workshop and field repair tasks.

Frequently Asked Questions

Can these nitrile strips handle fuel and oil?
Yes, nitrile with 70A durometer resists petroleum and many oils, so it is suitable for typical fuel and oil sealing tasks.

Are the strips long enough to make multiple O rings?
Yes, with 1 m and 2 m length options you can create several O rings or longer seals from each strip.

Will these O rings last outdoors?
They perform well in typical service but nitrile is susceptible to ozone and UV, so extended outdoor exposure will reduce lifespan compared with UV-stable elastomers.