Features and Benefits
◇Ideal sealing material for stretches, connections, perimeter seals and other moving
joints:
◇Neutral curing, suitable for coated glass, float glass, wooden materials, aluminum profiles,
galvanized steel plates, masonry and other materials;
◇The original seam width can be stretched/compressed by 35%;
◇Excellent weather resistance, sunlight, rain, ice, snow, ozone or extreme temperatures
will not cause adverse effects;
◇Good adhesion can be achieved without using primer for most building materials and
components;
●Easy to use, can be extruded and applied at any time with a general glue
gun; ◇Excellent anti-sag performance.
composition
◎Single-component, neutral, room temperature water vapor curing silicone sealant.
application
◇MF889 silicone weather-resistant sealant is suitable for high-performance weather-resistant and waterproof sealing
of glass assembly, curtain wall and building exterior wall design.
Main Specifications
Test items
skills requirement
When not cured, test at temperature (23±2)℃ and relative humidity (50±5)%.
Droop,mm
Extrudability,ml/min
Working hours,min
Surface drying time, h
Test results
Guideline

GB/T 13477.6

GB/T 13477.3

GB/T 13477.5

Curing time, d
Construction temperature range,℃
At temperature (23±2)℃, relative humidity (50±5)
28 days of curing test under % conditions
Hardness, Shore A
Displacement capacity,%

Temperature resistance range after curing,℃
Modulus at 100% elongation, MPa
Elongation at break,%
Tensile strength,MPa
Alkane plasticizer

GB/T 531.1

GB/T 22083

GB/T 13477.8

Not allowed to be checked out
not detected
GB/T 31851
color
In addition to black, gray and white, we can also negotiate and produce special colors according to customer requirements.

Adopt standards
MF889 silicone weather-resistant sealant meets or exceeds the following standards and specifications:

ASTMC 920 S type, NS type, 35HM, suitable for NT, G, A type
application

Sealant for building doors and windows
Slander
Application method
◎Surface cleaning
Remove all grease, dust, water stains, frost, surface dirt, residual sealant, glass assembly accessories and protective coatings and other impurities
and contaminants remaining at joints and assembly parts.
◎Glue injection
● Install backing materials, isolation pads, pad pole spacers and tapes as required. Masking tape should be used in areas where joints
are connected to ensure a clean and beautiful sealant line.
●For non-porous material surfaces, it is usually not necessary to apply primer to achieve good adhesion. However, for some porous material surfaces, it
may be necessary to apply primer to ensure good adhesion. It is recommended to do this before starting the project. Adhesion test.
●Continuously squeeze MF889 silicone weather-resistant sealant into and fill the joints (the sealant can be applied using a pneumatic glue gun and other glue injection equipment).
When using a pneumatic gun, the operating pressure should be adjusted to prevent bubbles from being generated during glue injection.
● When the sealant surface has not yet formed a skin, use appropriate force to press the sealant flat on the backing material and joint surface, and
smooth the sealant surface.
●Tear off the masking tape immediately after leveling is completed. Do not use liquids such as water, soapy water, or alcohol to help with leveling.
Operation precautions
● If it accidentally gets into your eyes, rinse immediately with plenty of water.
●Do not come into contact with skin for a long time and avoid contact with children.
●Do not contaminate food, drugs or cosmetics
● Please do an adhesion test before use and refer to the company's technical information and safety data sheet to learn about the safe use, hazards and other
information of the product. For any safety matters not involved in this product, please comply with the requirements of JGJ102
Storage and validity period
Products that are well packaged can be stored in a cool, ventilated, and dry place for 12 months and should be used before the "expiry date" on the outer packaging of the product.

Package
Plastic tube: 300ml each, 25 pieces per box
Soft packaging: 592ml each, 20 pieces per box
500ml each, 20 pieces per box
Usage restrictions
This product is not approved for use as a structural adhesive and has not been tested or represented as suitable for medical or pharmaceutical
use. This product is not suitable for:
●Seats in groundwater or places subject to excessive friction
● Long-term immersion in water
●On the surface of building materials that may leak oil, plasticizers, solvents, or partially vulcanized rubber gaskets or tapes
● Frost or looking wet on the surface
A place that is completely out of contact with air during curing (the sealant needs water vapor to cure)
Application of paint on the sealant surface (general paint cannot adhere to the silicone surface)
●Direct contact with food or other food grade surface applications