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

Product ID: 52777576

Details

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

💪5000 psi tensile strength

🔥600°F heat resistance

🚗Universal car model safe

$19.43

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Description

🔥 Seal the deal with instant, high-temp gasket power!

HEATPROOF HERO - Withstands scorching temps up to 600°F for ultimate durability
FAST FIX FORMULA - Full cure in just 10 minutes—get back on the road faster
OIL FLUID FIGHTER - Resistant to oils and fluids, keeping seals leak-proof and reliable
CAR COMPATIBLE CONFIDENCE - Safe on all car models, no sensor interference guaranteed
PRESSURE PROOF PERFORMANCE - Endures intense pressures up to 5000 psi without fail

ProSeal Sealpro 80726 is a high-temperature RTV silicone gasket designed for automotive use, offering heat resistance up to 600°F and tensile strength of 5000 psi. It cures fully in 10 minutes, is safe for all car models without fouling sensors, and resists oils and fluids to ensure a reliable, leak-proof seal.

Specifications

ASIN	B000FW7VNW
Best Sellers Rank	66,525 in Automotive ( See Top 100 in Automotive ) 454 in Fillers, Adhesives & Sealants
Brand	Sealpro
Colour	Red
Customer Reviews	4.6 4.6 out of 5 stars (2,684)
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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$19.43

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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