Will it fix a leaky plexiglass tank?

100% silicone is for use on glass and not recommended for long term adhesion on acrylics, plexiglass, plastics since they contain petroleum products which will cause the silicone to peel off in time. (MAY be fine for short-term use.) There are special adhesives/sealants for use with acrylics and plastics and they will be labeled as such. Plexiglass, specifically, needs an adhesive method that actually "melts" the plexiglass, which then creates the bond. 100% silicone adhesives/sealants will not do that.

Could this be used safely as a gasket around my filter screen at the bottom of dishwasher used to block food particles around edge of screen filter?

I’m no expert but as it is silicone and it is safe for aquariums once cured, it should be safe for a dishwasher.

Will salt water eat sealant

In general silicon sealants will handle salt water. I used this particular sealant for a fresh water tank, but I have used silicon sealants on my salt water sail boat without an issue. The main problem with all sealants is you need a clean, oil free, and dry surface for the sealant can properly attach to the surface. You need a humid, but not wet environment for the sealant to cure. I suggest placing a well dampened cloth in the bottom of the tank. You don't want water on the sealant, but you need moisture in the air.

After applying the silicone, approximately how many minutes do you have before taking the tape off?

if you mean using masking tape to keep the glue off an area, i would pull it off when it is still wet, and probably wouldnt wait more than 15 minutes to do so. Remember you can spritz the silicone with water to help it cure faster and better.

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Clear Aquarium Silicone Sealant - 10.2 Fluid oz Cartridge

Clear Aquarium Silicone Sealant - 10.2 Fluid oz Cartridge

Product ID: 2118741

Details

Brand
ASI
Color
Clear
Full Cure Time
10 Days
Item Weight
10.2 Ounces
Liquid Volume
10.2 Fluid

💧Waterproof & fish-safe seal

🧊Operates -57°C to +233°C

🧱Strong glass bonding, no primer

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900763₫

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Details

Brand
ASI
Color
Clear
Full Cure Time
10 Days

Description

🐠 Seal your underwater world with confidence and clarity!

LONG LASTING CLARITY - Crystal clear finish that won’t yellow or crack, keeping your tank pristine.
NO PRIMER NO PROBLEM - Bonds directly to glass with high modulus strength—skip the extra prep.
VERTICAL APPLICATION MASTERY - Non-slump formula means no sagging or dripping on walls or corners.
UNMATCHED AQUARIUM PROTECTION - Creates a durable, waterproof seal that’s 100% safe for your aquatic life.
EXTREME TEMPERATURE RESILIENCE - Withstands freezing cold to scorching heat, perfect for any environment.

Clear Aquarium Silicone Sealant by ASI is a premium, one-component RTV silicone designed for fresh and saltwater aquariums. It forms a strong, waterproof, and non-toxic bond to glass without primers, cures clear in 7-14 days, and endures extreme temperatures from -57°C to +233°C. Its non-slump formula allows easy vertical application, ensuring a flawless, long-lasting seal that protects aquatic habitats with professional-grade reliability.

Specifications

ASIN	B00EZB1QQ2
Best Sellers Rank	#11,942 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Silicone Adhesives
Brand	ASI
Brand Name	ASI
Color	Clear
Customer Reviews	4.7 out of 5 stars 2,964 Reviews
Full Cure Time	10 Days
Item Form	Fluid Oz
Item Weight	10.2 Ounces
Liquid Volume	10.2 Fluid Ounces
Manufacturer	Gordon Glass Co
Material Type	Silicone
Model	ASI Aquarium Clear
Number of Items	1
Part Number	ASI Aquarium Clear
Surface Recommendation	Glass
UPC	802455893066
Unit Count	10.2 Fluid Ounces
Water Resistance Level	Waterproof

Reviews

J**.

4.03.2026

E**K

13.01.2026

D**T

17.04.2026

N**R

29.12.2025

J**L

27.06.2018

A**R

7.03.2026

G**L

2.08.2025

T**N

31.03.2022

P**E

17.10.2025

M**.

26.02.2024

F**G

1.07.2022

B**N

12.08.2023

A**R

28.05.2022

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