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DOWSIL Neutral Plus Silicone Sealant is a multi-purpose one-part neutral cured silicone sealant, designed for residential window and door filling and sealing, and residential decoration filling. A cost effective, multi-purpose, neutral cure silicone sealant offering long term durability in a range of general sealing, general glazing, waterproofing and trade applications. Non-corrosive to concrete, brick and metals.
Features & Benefits:
One-part room temperature cured silicone sealant
Keeps flexibility at -40°C~150°C after cured
Good adhesion to various construction substrates, such as glass, anodized aluminum, GMS steel, ceramic, and some surface treated materials
Adhesion to - Brickwork, Concrete, Glass, Metal
Appearance - Opaque, Translucent
Application Temperature Range : -10 to 50°C
Chemistry - Neutral
Color - Aluminum, Black, Bronze, Grey, Ivory, Translucent, White
Cure System : 1-Part Cure
Cure Type - Neutral Cure
Durometer - Shore A : 19 Shore A
Elongation - 300 %
Flow - NonSag
Movement - Low
Movement Capability - 15 %
Resistance Type - Oxidation Resistance, Ozone Resistance, Solvent Resistance, Thermal Resistance, UV Resistance, Water Resistance
Service Temperature High - 150°C
Service Temperature Low : -50°C
Substrate : Non-porous
Tensile Strength - >145 psi
Water Resistant - Yes
Where Used - Factory, Job Site
Working Time - 10 Minutes
Uncured - 23°C, 50% R.H:
Flow - <3 mm
Tack-Free Time - 8.4 min
Extrusion Rate - 397 g/min
Specific Gravity - 1.40 g/cm3
Cured 7 days - 23°C, 50% R.H. -
Hardness - 35 Shore A
Tensile Strength - 1.26 MPa
Elongation at Break - 455 %
DOWSIL Neutral Plus Silicone Sealant is a multi-purpose silicone sealant. Its typical applications include:
Residential window and door glazing and sealing
Residential decoration filling and sealing, frame and floor filling
How to Use:
Step 1 - Correct Joint Design :Correct joint design minimizes stresses on the sealant, enables optimum sealant movement capability, facilitates sealant application and minimizes the potential for sealant splitting and voiding by enabling cure by-products to exit from the joint. Guidelines are:
Minimum joint width of 6 mm.
Minimum joints depth of 6 mm.
For larger joints the width of the joint should be greater than the sealant depth, recommended the ratio of joint width to depth is 2:1.
Avoid 3-sided adhesion: Apply backer rod or bond breaker tape in the base of the joint to ensure the sealant is only bonded to the sides of the joint and is free to move to its full capacity under joint movement
Step 2 - Clean All Joint Surfaces :Substrate surfaces must be completely clean, dry and sound. Completely remove any loose debris and/or old sealant. Since many materials have protective films, they need to be cleaned with solvents such as toluene, xylene, methyl ethyl ketone, and banana oil. For non-porous materials such as glass and aluminum alloy materials:
Wipe the interface surface with a lint-free, white cloth and solvent to clean grease and dirt.
Immediately wipe again with another piece of clean cloth to completely remove any remaining solvent and impurities from the interface.
Primer: Some materials may require a Dow primer to enhance adhesion to the material. Please contact Dow for more information on Dow primer.
Step 3 - Install Backing Material :Backer rod (e.g. closed cell polyethylene type or open cell polyurethane foam type) or similar material (e.g. low tack polyethylene tape for shallow joints) can be used in the base of the joint to control sealant depth and avoid 3 sided adhesion by prevention adhesion to the base of the joint.
Step 4 - Mask Adjacent Surfaces With Masking Tape : Masking will ensure a clean, neat appearance and reduce clean up by protecting surrounding areas from excess sealant.
Step 5 - Applying Sealant :
Cut tip off the cartridge.
Cut nozzle at 45° angle to the desired shape and size.
Screw nozzle onto cartridge.
Place cartridge in caulking gun. Air-operated or hand-operated caulking guns can be used.
Apply sealant into the base of the joint so that it completely fills the joint, wetting both sides. Do not simply lay a bead on the surface as the sealant will not penetrate the joint under its own weight.
Step 6 - Tool Joint and Remove Masking Tape :
Tool the surface of the joint immediately after sealant application to provide a smooth even finish and to ensure the sealant wets the sides of the joint.
Tooling should be completed in one continuous stroke before the sealant forms a skin (i.e.: within the working time). A tool with a convex profile is recommended to keep the sealant within the joint. When sealing horizontal joints tool the sealant to that any liquids (e.g. rain water, cleaning solutions) do not collect and pool on top of the sealant.
Do not use soap or water as tooling aids.
Remove masking tape immediately after tooling and before the sealant skins.
After a skin has formed, do not disturb the joint for 48 hours.
Avoid contact with various cleaning agents or solvents whilst sealant is curing.
Uncured sealant can best be cleaned from tools using commercial solvents such as xylene, toluene or methyl ethyl ketone. Cured sealant is not soluble and must be trimmed with a blade, avoid undercutting the seal.
Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information.
Test it before use. The user is responsible to conduct property test before using to confirm the sealant produces satisfied results. Especially for the surface which is difficult to adhesion and coated substrates, the cohesiveness should be tested. Be careful the application temperature.
When the substrates surface is over than 50°C, it is easy to cause fast-cure or bubbles. When the substrates temperature is lower than 5°C, it is easy to slow-cure. And also, a layer of indiscernible fog is formed on the surface of substrates, which affects the cohesive, so it should be wiped with a piece of dry cloth or heat blow drier. Keep environment well-ventilated and avoid inhaling too much volatile gas generated during cure.
This product is neither tested nor represented as suitable for medical or pharmaceutical uses. This product is not suitable for the following purposes:
Curtain wall glazing
Continuous water immersion
Materials that bleed plasticizers or solvents or release by-products that may inhibit its
Cure, affect adhesion or discolor the sealant
Usable Life And Storage:
Stored properly in a dry and well-ventilated place below 30°C. Usable life is 18 months in original package. For more information please refer to the package.
300 ml Cartridge
1 Cartridge of Neutral Plus Silicone Sealant (300 ml)