Stoppers & Corks

Stoppers and corks are used in laboratories to securely seal vessels. Laboratory stoppers are used not only to prevent spills, but also to trap noxious fumes or to allow the vessel to be shaken.

Laboratory stoppers differ from consumer stoppers both in the variety of sizes specified and in their possible resistance to application hazards. The variety of vessels available in a laboratory mean that over 20 different cork and rubber stopper sizes are available. Green neoprene stoppers are favored for chemical resistance, while red and white silicone stoppers are ideally suited for high temperature applications.

From $5.00
These grade XXX tapered cork stoppers are an excellent choice for general laboratory use. They are effective for both liquid and solid mediums, and offer light weight, resilience and compressibility. Chemically inert and moisture resistant. Sold as packs of 100.
From $5.00
Filter Adapter Set of 7, Neoprene
-6%
Set of seven neoprene adapter cones designed to fit Buchner and fritted glass funnels, porcelain filters without headpieces, and for reverse flow cleaning of filter crucibles. Adapters can be used to support funnels, Gooch crucibles, filter tubes, and other apparatus in filtration assemblies. These adapters are functional even if not...
From $13.00 From $13.84
Kartell Test Tube Stopper, LDPE
-14%
Single-position, tight-fitting, low density polyethylene plug-type plastic test tube stoppers to fit disposable test tubes.
From $42.00 From $48.74
Neoprene Stoppers
-6%
From $18.14 $17.00
Neoprene stoppers can be used in areas where rubber would be attacked by reagents or solvents. Synthetic green neoprene stoppers have good resiliency and shelf-life. They withstand petroleum products and oils as well as most inorganic acids and bases. Sold as one-pound bags.
From $17.00 From $18.14
Pluro-Stopper Set
-30%
From $24.20 $17.00
Set comes with 8 sizes. Stoppers are to be used with Buchner and Fritted glass funnels.
From $17.00 From $24.20
From $8.00
This molded rubber filter disc is designed to support and seal a filter crucible or a funnel in the neck of a filter flask. Inside diameter of the socket at top is 32mm, and outside diameter of the disc is 76mm. The bottom of the disc is flat so that...
From $8.00
These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F).These convenient assortments of various sizes of rubber stoppers are sold as one-pound...
From $9.00
These one-hole black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from -25 to 70°C (-13 to 158°F). Available in solid, one-hole, and two-hole versions. Each stopper has its...
From $8.00
These solid black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from -25 to 70°C (-13 to 158°F). Each stopper has its size marked in raised figures. All stoppers...
From $8.00
These two-hole black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from -25 to 70°C (-13 to 158°F). Available in solid, one-hole, and two-hole versions. Each stopper has its...
From $8.00
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