WidgetCo offers an array of silicone stoppers for use in laboratories, high temperature environments, and other industrial applications. Our silicone stoppers are designed to stand up against extreme temperatures as well as prolonged exposure to harsh chemicals. They’re perfect for sealing up test tubes, beakers, and any container that requires a tighter seal. Every one of our silicone rubber stoppers are made from highest quality silicone classified as a 55 on the shore durometer, for durability.
| • Suitable for high temperatures up to 550ºF/180ºC • Industrial grade • 55 durometer |
How to choose the right size silicone stopper. As a general rule, select the stopper with the biggest bottom diameter smaller than your opening. |
Buy silicone stoppers below
#00 White Silicone Rubber Stoppers
Top Diameter: 5/8" | .590" | 15mm
Bottom Diameter: 3/8" | .393" | 10mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 3/8" | .393" | 10mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#0 White Silicone Rubber Stoppers
Top Diameter: 11/16" | .669" | 17mm
Bottom Diameter: 1/2" | .511" | 13mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1/2" | .511" | 13mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#1 White Silicone Rubber Stoppers
Top Diameter: 3/4" | .748" | 19mm
Bottom Diameter: 1/2" | .511" | 13mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1/2" | .511" | 13mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#2 White Silicone Rubber Stoppers
Top Diameter: 3/4" | .787" | 20mm
Bottom Diameter: 5/8" | .629" | 16mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 5/8" | .629" | 16mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#3 White Silicone Rubber Stoppers
Top Diameter: 15/16" | .945" | 24mm
Bottom Diameter: 11/16" | .708" | 18mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 11/16" | .708" | 18mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#4 White Silicone Rubber Stoppers
Top Diameter: 1" | 1.024" | 26mm
Bottom Diameter: 3/4" | .787" | 20mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
Bottom Diameter: 3/4" | .787" | 20mm
Length: 1" | 1.023" | 26mm
Durometer: 55
Material: Silicone
#5 White Silicone Rubber Stoppers
Top Diameter: 1-1/16" | 1.063" | 27mm
Bottom Diameter: 7/8" | 0.906" | 23mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 7/8" | 0.906" | 23mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#6 White Silicone Rubber Stoppers
Top Diameter: 1-1/4" | 1.260" | 32mm
Bottom Diameter: 1" | 1.024" | 26mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1" | 1.024" | 26mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#7 White Silicone Rubber Stoppers
Top Diameter: 1-1/2" | 1.457" | 37mm
Bottom Diameter: 1-1/8" | 1.181" | 30mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1-1/8" | 1.181" | 30mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#8 White Silicone Rubber Stoppers
Top Diameter: 1-5/8" | 1.614" | 41mm
Bottom Diameter: 1-5/16" | 1.299" | 33mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1-5/16" | 1.299" | 33mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#9 White Silicone Rubber Stoppers
Top Diameter: 1-3/4" | 1.772" | 45mm
Bottom Diameter: 1-1/2" | 1.457" | 37mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1-1/2" | 1.457" | 37mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#10 White Silicone Rubber Stoppers
Top Diameter: 2" | 1.969" | 50mm
Bottom Diameter: 1-5/8" | 1.654" | 42mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1-5/8" | 1.654" | 42mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#11 White Silicone Rubber Stoppers
Top Diameter: 2-1/4" | 2.205" | 58mm
Bottom Diameter: 1-15/16" | 1.890" | 48mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 1-15/16" | 1.890" | 48mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#12 White Silicone Rubber Stoppers
Top Diameter: 2-1/2" | 2.520" | 64mm
Bottom Diameter: 2-1/8" | 2.126" | 54mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 2-1/8" | 2.126" | 54mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
#13 White Silicone Rubber Stoppers
Top Diameter: 2-9/16" | 2.598" | 66mm
Bottom Diameter: 2-1/4" | 2.283" | 58mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone
Bottom Diameter: 2-1/4" | 2.283" | 58mm
Length: 1" | 0.987" | 25mm
Durometer: 55
Material: Silicone