Silicone Rubber Gasket Sheet: Properties, Uses and Selection

30 October, 2026 | Admin

Short answer: Silicone rubber is a flexible rubber
that keeps its elasticity across a wide temperature range, resists
weather, ozone and ageing, and is available in food-contact grades.
Silicone sheet is used for gaskets, seals, insulation and covers in
ovens, food equipment, electrical gear and outdoor equipment. It is
weaker in tear and abrasion and not suited to strong oils.

Table of Contents

Key properties

stays flexible from very low to high temperatures
excellent resistance to weather, ozone and UV
good electrical insulation
low compression set in many grades, so it keeps its seal
food and medical-type grades available (check the specific
grade)
non-stick and easy to clean

Limits

lower tear strength and abrasion resistance than many rubbers
poor resistance to many oils, fuels and solvents
not for use with steam in some grades, so check the grade
higher cost than general rubbers

Typical uses

Application	Why silicone
Oven and heater door gaskets	Heat stability
Food and beverage equipment	Food-contact grades, easy cleaning
Electrical enclosures	Insulation and weather resistance
Outdoor covers and seals	UV and ozone resistance
Vacuum and press pads	Flexible and non-stick

Choosing silicone sheet

Temperature: confirm the continuous and peak
temperature for the grade.
Hardness: softer for sealing, harder for load.
Thickness: as required by the joint.
Food or medical contact: ask for the right grade
and documents.
Colour: red, white, translucent and other colours
exist, often tied to grade.
Reinforcement: fibreglass-reinforced silicone gives
more strength for pad and gasket use.

Cutting and fitting

Silicone cuts cleanly with a sharp blade or die. It can be bonded
with silicone adhesives. Take care not to stretch or tear it, since tear
strength is limited. Do not use silicone where oil or fuel contacts the
gasket.

Free engineering tools

Gasket size chart — Find the ASME B16.21 gasket ID and OD for your flange size and class
Plastic weight calculator — Work out the weight of Silicone Rubber Gasket Sheet sheets, rods and tubes in kg

Request a quote for this product →

Common mistakes to avoid

using silicone in oil or fuel service
choosing a general-purpose grade for food contact without
documents
using too thin a sheet in a high-compression joint
expecting silicone to take abrasion
forgetting the post-cure that some grades require for food use

Questions to ask your
supplier

What are the temperature limits and hardness? Is the grade
food-contact, and what documents come with it? Is the sheet plain or
reinforced? What is the thickness tolerance? Can sheets be cut to
shape?

Diode Trading EST supplies rubber products across Saudi Arabia, and
every order ships with a Material Test Certificate. request a quote

Getting a quotation

Send a short brief with your sizes, quantity, and delivery location
in Saudi Arabia, and we will reply with availability, lead time and a
quotation. If you are unsure of the right grade, describe the working
conditions and we will help you choose.

Handling and storage

Keep silicone sheet clean and away from oils, which can contaminate
it. Store flat or in rolls without heavy loads. Silicone attracts dust,
so wrap it in clean film. Cut gaskets with a sharp blade to avoid ragged
edges.

Silicone grades at a glance

General industrial silicone suits ovens, doors and covers.
Food-contact grades are made from approved raw materials and often need
a defined post-cure; request documentation. Fibreglass-reinforced
silicone gives more strength and is used for pads, covers and insulation
blankets. Platinum-cured grades are used for the cleanest applications.
Tell us your use and we can suggest the grade family.

Typical questions on cost

Silicone costs more than general rubbers, so use it where its
temperature range, cleanliness or weather resistance is actually needed.
For plain water or air gaskets at normal temperature, a cheaper rubber
may be enough. Tell us the conditions and we will suggest the most
economical suitable material.

FAQ

What is silicone sheet used for? Gaskets, seals,
insulation and covers, including in ovens and food equipment.

Is silicone resistant to oil? Not generally. Use NBR
for oils.

Can silicone be used with food? Only food-contact
grades. Ask for documentation.

Is silicone reusable as a gasket? Often yes, if
undamaged, but inspect before reuse.

Products related to this article

Diode Trading EST supplies these Rubber Sheets, Gaskets & Seals from stock in Dammam, with delivery across Saudi Arabia and the GCC.

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