Premium silicone sealants and liquid gaskets. Highly flexible and 100% waterproof. Featuring high-temperature RTV liquid gaskets (-40~240°C), movement-capable construction sealants, and anti-fungal sanitary sealants for bathrooms and kitchens.
Proper application ensures long-lasting durability and 100% effectiveness in blocking water and moisture.
1
Clean the Surface
Thoroughly clean the area to remove dust, oil, and moisture. If there is old sealant, scrape it out completely to ensure optimal silicone adhesion.
2
Apply Masking Tape
Apply Masking Tape along both edges of the joint to keep the surrounding area clean and ensure sharp, straight lines.
3
Extrude and Smooth
Use a caulking gun to apply the silicone into the joint. Then, use a small spatula or a soapy finger to smooth the bead continuously.
4
Remove Tape & Let Cure
Remove the masking tape "immediately" before the silicone skins over. Allow it to cure completely for several hours to 1 full day, depending on the formula.
SPEC COMPARISON
Silicone Sealant Spec Comparison
Compare silicone grades to make informed decisions for engine maintenance, building facades, and sanitary applications.
Technical review by Wetape Engineers · Data sourced directly from manufacturers
Features
RTV GasketNX Series (77, 78, 79)
WeatherproofingDOWSIL™ 791
Sanitary SiliconeAnti-Fungal
Curing Mechanism
RTV (Room Temp. Vulcanizing)
Neutral Cure
Acetic/Neutral with Anti-Fungal
Temperature Resistance
-40°C to 240°C
UV & Severe Weather Proof
High Moisture / Room Temp
Key Highlights
Resistant to oil/chemicals, insulates electrically
Accommodates ±50% movement (ASTM C920)
Resists mold and bacteria growth
Main Applications
Engine gaskets, flanges, motors
Curtain walls, metal/glass structures
Bathrooms, sinks, tile joints
WHO USES IT
Target Industries
Different industries require distinct silicone sealant properties.
Automotive & Manufacturing
Uses: RTV Gasket Silicone
Functions as a liquid gasket to seal engine leaks, connect flanges, and seal electrical terminals due to its high heat and oil resistance.
Contractors & Construction
Uses: Weatherproofing Silicone
Seals building joints, window frames, doors, coated metal panels, and curtain walls by excellently accommodating thermal expansion and contraction.
Facility Maintenance
Uses: Sanitary & General Use
Fills gaps between tiles, sinks, or roofs to block moisture penetration, stop leaks, and prevent mold accumulation in wet areas.
Q&A
Frequently Asked Questions
What is RTV silicone?
RTV stands for Room Temperature Vulcanizing. It is a silicone rubber that cures upon exposure to moisture in the air. It is highly flexible, withstands extreme temperatures (-40°C to 240°C), and is widely used as a liquid gasket for engines and electrical equipment.
How long does it take for silicone sealant to dry?
Generally, you should allow the silicone sealant to fully cure, which can take anywhere from a few hours to a full 24 hours, depending on the specific formula, ambient humidity, and the thickness of the application.
Is there an anti-fungal silicone for bathrooms?
Yes, for high-moisture areas like bathrooms and kitchens, you should use Sanitary Silicone Sealants. These formulas contain specific additives that prevent mold and bacterial growth, maintaining hygiene and long-lasting aesthetics without turning black.
DOWSIL™ 791 is a one-part, RTV, neutral-cure, architectural-grade waterproof silicone sealant for sealing joints in curtain walls and building facades. It allows for expansion and contraction of joints up to ±50%, provides excellent adhesion without primer, and is resistant to sun, rain, and ozone. It meets ASTM C920 Class 50 standards and is SWRI validated.
฿190.00 excl tax
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