What are the internal and external dimensions of the washers? The package dimensions are useless.

I measured the outer diameter to be =25.0mm (just a hair under 1"), inner diameter = 9.0mm (about 11/32"), thickness = 3.0mm (about 1/4"). Hard to measure more exactly because they are elastic.

How much heat will these withstand?

Depending on the silicon grade, typical range for silicon gasket temperature is approx. -100° F to 500° F for high quality silicon and conservative approximate range of -25° F to 300° F.

How thick are these? From current reviews it's sounding more than 1/8"

Below are measurements (thickness) in three formats using calipers: 1/8 inch .12 inch 3 mm

How malleable are these in terms of stretching?

They do stretch, but thickness and strength will cause the washer to buckle, if you force it over a larger object. I needed the center hole to be larger, so I used a sharp metal tube, curtain rod, to enlarge the hole.

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Litorange Grolsch Gaskets Silicone Seals - For Swing Top Bottles-40 Pack Combo Pack Clear, Made from Soft Silicone (Not Rubber, Better Sealing Than Rubber)

Litorange Grolsch Gaskets Silicone Seals - For Swing Top Bottles-40 Pack Combo Pack Clear, Made from Soft Silicone (Not Rubber, Better Sealing Than Rubber)

Product ID: 806540065

📦40-pack bulk value

🔄Fits most swing-top bottles

🛡️Superior silicone seal

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Description

🔒 Seal your brew like a pro—never settle for leaks again!

BULK CONVENIENCE - Generous 40-pack combo in a handy plastic box keeps you stocked and ready for any bottling need.
CLEAR DISCREET DESIGN - Transparent gaskets maintain your bottle’s sleek look while delivering premium sealing power.
DURABILITY MEETS SAFETY - Non-deforming, food-safe silicone guarantees long-lasting freshness without chemical worries.
UNIVERSAL COMPATIBILITY - Designed to fit a wide range of swing-top and flip-top beverage bottles for ultimate versatility.
UNMATCHED SEAL INTEGRITY - Soft FDA-grade silicone ensures leak-proof, crack-resistant performance—no rubber compromises.

Grolsch Gaskets Silicone Seals are premium FDA-approved soft silicone replacements designed for swing-top and flip-top bottles. This 40-pack combo offers durable, leak-proof sealing that outperforms traditional rubber gaskets, ensuring your beverages stay fresh and secure with a clear, discreet fit.

Specifications

ASIN	B07T4FFB2N
Best Sellers Rank	#105,560 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #176 in Beer Brewing Bottles & Bottling
Customer Reviews	4.5 4.5 out of 5 stars (715)
Date First Available	June 13, 2019
Item Weight	3.17 ounces
Manufacturer	Litorange
Package Dimensions	5.55 x 4.53 x 2.13 inches

Reviews

D**B

Just what I wanted

16.08.2020

N**L

does the job

7.11.2024

J**T

Work wonderful in place of rubber gaskets

20.10.2025

D**Y

Great, as described👍

16.11.2025

L**R

adapté

s'adapte bien aux bouteilles à fermeture mécanique. facile à installer et Étanchéité remarquable!

3.08.2024

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$38.51

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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