Vial Sealing Film (Parafilm)

Parafilm is the stretchy laboratory sealing film you wrap around a vial's cap edge for an extra seal, keeping moisture and grime off the stopper between uses.

Last edited 2026-09-28 · written by PepPrep

Lab sealing film

What it’s for

A lab-bench classic: keeps moisture and grime off stoppers between uses.

What to check in the listing

A roll lasts years, so buy the narrowest width you can find. Treat it as a second seal, never as a fix for a stopper that's already leaking.

At a glance

TypeStorage accessory

Used forHome storage, Travel storageUsed for lists the situations this product is for; the decision tool and the Finder match on these.

PriceBudgetPrice tier is the rough position within its category, not a live price: budget is the cheapest sensible option, premium costs more for a reason the page explains.

TravelCarry-on friendlyTravel says whether it is practical to fly with: carry-on means it goes through security without fuss.

SterileNoSterile means individually sealed and sterile until opened; anything that touches the inside of a vial or your skin should be.

Pack1Pack is how many come in the listing this site links to; it is shown only where every store's listing gives the same count. Check it against the listing, since photos often show ten and ship one.

ReusableNo

Specifications above were recorded from the Amazon listing on 2026-09-03. Listings change hands: open the listing for its current description, price and availability.

For where in a fridge this belongs and how to prove it actually stays cold, read How to Store Peptide Vials: Fridge, Light, Heat.

Category: Storage & Cold
Also useful: Build a full kit →

Tools for this: Temperature-loss estimator · Narrow this category by specification · Compare side by side

Vial Sealing Film (Parafilm)

What it’s for

What to check in the listing

At a glance

Others in Storage & Cold

Often used with this

Read before you buy