Will this stick / seal between two silicone surfaces?

I would say this is the wrong product - you probably need a good quality silicon adhesive and would need to buff/ket the surfaces of the silicon surface to form a bond. This product is designed to form a gasket (usually under pressure) so is more about making the two surfaces water-tight or air-tight than actually sticking them together.

Would it fix a leaking diesel injector seal?

It would not recommend it for the use of fixing a leaking diesel injector.

Is this 100% pure silicone or has any additives? The ingredients aren’t listed. Thanks

Technically, no silicon is 100% silicon. Silicon is engineered to serve different purposes. The dye is red or black which will be a silicon based additive. To endure extreme hot and cold will require chemical additives too. To resist petroleum products such as petrol and oil while serving as a gasket requires chemical intervention too. It’s an automotive silicon gasket sealer which can be used to replace old fashioned paper gaskets. It works. If you really want pure silicon...good luck. “Pure silicon” is a myth.

Would it work using on a lawnmower carburetor

Depends which part , usually if its carb to engine you can buy a rubber gasket or gasket paper with this lightly smeared on would work

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ProSeal Sealpro 80726 High Temperature RTV Silicone Instant Gasket, Red

ProSeal Sealpro 80726 High Temperature RTV Silicone Instant Gasket, Red

Product ID: 52777576

Details

Brand
Sealpro
Colour
Red
Full cure time
10 Minutes
Item weight
0.02 Kilograms
Liquid volume
85 Millilitres

💪Resists pressures up to 5000psi

🔥Withstands up to 600°F

🚗Safe for all car models

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VT6262

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Description

🔥 Seal like a pro, drive with confidence! 🚗

HEAT DEFYING SEAL - Engineered to endure extreme temperatures up to 600°F, perfect for high-heat automotive and industrial applications.
OIL FLUID RESISTANT - Resistant to a wide range of automotive oils and fluids, maintaining integrity under harsh conditions.
INSTANT GASKET SOLUTION - Ready-to-use RTV silicone that cures quickly, saving you time and guaranteeing a professional-grade seal.
UNIVERSAL COMPATIBILITY - Formulated to be sensor-safe and compatible with all car models, eliminating guesswork in repairs.
PRESSURE PROOF PERFORMANCE - Withstands intense pressures up to 5000psi, ensuring a leak-proof, durable gasket every time.

ProSeal Sealpro 80726 is a high-temperature RTV silicone gasket designed to withstand up to 600°F and pressures of 5000psi. Safe for all car models and resistant to oils and fluids, it delivers a reliable, sensor-friendly seal ideal for automotive exhausts and industrial uses. This 85g tube offers a fast-curing, durable solution trusted by professionals and DIYers alike.

Specifications

ASIN	B000FW7VNW
Best Sellers Rank	10,882 in Automotive ( See Top 100 in Automotive ) 123 in Fillers, Adhesives & Sealants
Brand	Sealpro
Colour	Red
Customer Reviews	4.6 4.6 out of 5 stars (2,668)
Full Cure Time	10 Minutes
Global Trade Identification Number	00050291807260, 00502918072600
Included Components	Hi Temp RTV Silicone Gasket
Item Form	Liquid
Item Type Name	ProSeal 80726 High Temperature RTV Silicone Instant Gasket, Red
Item Weight	0.02 Kilograms
Liquid Volume	85 Millilitres
Manufacturer	Super Glue Corporation
Manufacturer Part Number	80726
Material	Silicone
Model Number	80726
Number of Items	1
Product Warranty	1
Surface Recommendation	Pipe
Tensile Strength	5000 Pounds Per Square Inch
UPC	050291807260
Water Resistance Level	Not Water Resistant

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VT6262

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

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TrustScore 4.5 | 7,300+ reviews

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