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Corks

Commonly used in laboratories because of their impermeability and general absence of toxic elements, cork is a useful material to stop test tubes and flasks. Cork, also known as a stopper or bung, is partially inserted inside of a container to form a seal. This differs from a lid, which does not displace the inner volume during a seal. Cork stoppers, which come in numerous sizes, are generally safe for use in packaging or for the processing of food and are best suited for solid specimens and materials. Corks should be rolled on a clean surface to soften their lower half prior to use, allowing the cork to expand and form a tight seal when pressed into a flask or vial.
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1 – 15 of 25 results
1

Fisherbrand™ Cork Stoppers - Laboratory Grade

100% natural cork

EDGE
Product Type Cork Stopper
Color Natural
Grade Laboratory
Material Wood
For Use With (Application) Ideal for sealing bottles, safe to use in the packaging and/or processing of food
2

Fisherbrand™ Cork Stoppers - Superior Grade

Corks are cut from high-quality wood and are selected to meet superior standards

EDGE
Product Type Cork Stopper
Color Natural
Grade Superior
Material Wood
For Use With (Application) Ideal for sealing bottles
3

Fisherbrand™ Select Cork Stoppers

Cork stoppers

Product Type Cork Stopper
Material Cork
For Use With (Application) Ideal for sealing bottles, safe to use in the packaging and/or processing of food
5

Fisherbrand™ Extra-Long Cork

Punched out from natural cork wood and tapered to size

6

Fisherbrand™ Superior Grade Cork Stoppers, Assorted Sizes

Corks are cut from high-quality wood and ideal for sealing bottles. Assorted lengths Sizes: 6-15

8

United Scientific Supplies Cork Stoppers
SDP SCI_ED

Grade XXX Tapered Cork Stoppers are an excellent choice for general laboratory use

Shape Tapered
Product Type Cork Stopper
Color Tan
Quantity 100 Pk.
Material Cork
Autoclavable Not Autoclavable
Sterility Non-sterile
9

Eisco™ Bark Cork Stopper
SDP SCI_ED

Available in pack of 10.

Shape Conical
For Use With (Equipment) Bottles, flasks and test tubes
Product Type Cork Stopper
Color Brown
Quantity 10 Pk.
Grade 9 to 12
Material Bark
Autoclavable Not Autoclavable
Sterility Non-sterile
10

Cork Corner Div Of Gerbert Ltd Economical Cork Stoppers
SCI_ED

For all of your laboratory needs.

Product Type Cork Stopper
Grade Laboratory
Material Cork
For Use With (Application) Ideal for sealing bottles
11

Cork Corner Div Of Gerbert Ltd Corks of Assorted Sizes
SCI_ED

Be prepared with these sturdy cork stoppers in a range of sizes.

Product Type Cork Stopper
Stopper Number Assorted
Material Cork
For Use With (Application) Ideal for sealing bottles
12

BYK Gardner CORKS BAG OF 149
SDP

Bubble Viscometers Tubes Corks Viscosity

ENCOMPASS
13

Chemglass Life Sciences 100 mm O.D. x 50 mm I.D. Cork Flask Support Ring for Round-Bottom Flasks

Cork flask support ring designed to cradle and stabilize round-bottom flasks. The concave top provides a secure seat for spherical glassware during storage, handling, or short-term support on benches.

  • Concave recess supports round-bottom flasks.
  • Outer diameter 100 mm, inner diameter 50 mm.
  • Made from natural cork for cushioning and grip.
  • Fits flasks approximately 150-250 mL.
  • Supplied individually (each).

ENCOMPASS_PREFERRED
14

Paul N Gardner Company VISCOSITY TUBE CORKS 150/PK

Gardner Empty Viscosity Tube Corks, 150/package.

ENCOMPASS
15

Electron Microscopy Sciences Replacement Cork Stopper 10 per pack

Replacement cork stopper for alcohol burner with ground glass cap #64213-01.

ENCOMPASS_PREFERRED