GUIBAO 993 Skylight With Superior elasticity Outstanding Weatherability Unprimed Silicone Sealant

• CAS No.: 63148-60-7
• Morphology: Solid-State
• Application: Construction
• Material: Silicone
• Classification: Room Curing
• Main Agent Composition: Natural Polymer
• Model NO.: 993
• Characteristic: Weatherability
• Promoter Composition: Curing Agent
• Composition: Organic Material
• Color: Black and Translucent
• Transport Package: Cartridge
• Specification: 300ml/cartridge
• Trademark: GUIBAO
• Origin: China
• HS Code: 3506100010
• Production Capacity: 200, 000 Tons/Year

Product Description

High performance neutral cure silicone with superior elasticity, movement accommodation and weatherability, ideally suited for skylight joint seal applications

Basic Uses
GUIBAO 993 Silicone Sealant for Skylight is a high performance silicone sealant specially designed for

1. Weather and watertight joint seal in skylight engineering
2. Weather and watertight seal for the ceilings over the waiting halls at airports, railway stations and bus stations
3. Sealing other construction joints with greatly high movement or safety requirement

Features

1. One part, neutral room temperature cure
2. Superior elasticity, low modulus, remain stable and flexible from -50 ºC to +150 ºC
3. Outstanding weatherability and resistance to UV, snow, rain, ozone, water and etc.
4. Excellent unprimed adhesion to most building materials
5. Non staining or corrosive to most building materials
6. Fast cure rate, easy to use

Colours
GUIBAO 993 is available in black and translucent.

Packaging
GUIBAO 993 is available in disposable cartridges (net 300ml), 24 pieces to a carton.

Specifications
GB 993 is designed to meet or even exceed the requirement of

1. China national specification GB/T 22083-2008 class 50
2. Complies with ASTM C 920

Storage and Shelf Life
GB 993 should be stored at or below 27ºC in original unopened containers. It has a shelf life of 12 months from the date of manufacture.

Typical Properties

Test Method	Property	Unit	Standard	Result
GB/T 13477 (ISO 7390)	Slump	mm	≤3	0
GB/T 13477 (ISO 8394)	Extrusion rate	ml/min	≥80	232
GB/T 13477 (ASTM D 2377)	Tack free time	h	≤3	2.0
GB/T 13477 (ISO 7389)	Extension recovery	%	≥70	93
GB/T 13477 (ISO 8339)	Tensile strength	MPa
	23ºC		≤0.4	0.36
	-20ºC		≤0.6	0.45
GB/T 13477 (ISO 37)	Elongation at break	%	≥300	426
GB/T 13477	Adhesion at fixed stretch		No failure
GB/T 13477	Adhesion after heat contract and cold extension
GB/T 13477	Adhesion after water immersion and UV exposure

GB: Chinese National Standard
ASTM: American Society for Testing and Materials
ISO: International Standardization Organization

Surface Preparation
Clean all joints removing all foreign matter and contaminants such as oil, grease, dust, water, frost, old sealants, surface dirt, or glazing compounds and protective coatings.

Application Method
Install back-up materials or joint fillers, setting blocks,
spacer shims, and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Primer is generally not required for non-porous surfaces, but may be necessary for optimal seal performance of certain porous surfaces. So adhesion test is always recommended.

Apply GUIBAO 993 in a continuous operation using dispensing guns. Before a skin forms, tool the sealant with light pressure to spread the sealant against the backing materials and joint surfaces. Remove masking tape as soon as the bead is tooled.

Limitations
GUIBAO 993 should not be applied:

1. For structural glazing
2. To the materials that bleed oils , plasticizers or solvents, such as impregnated wood
3. In totally confined spaces as sealant requires atmospheric moisture for cure
4. To frost laden or damp surfaces
5. For continuous water immersion
6. When surface temperature below 4ºC or over 50ºC

Safety Information

1. GUIBAO 993 is a chemical product, not edible, no implantation into body and should be kept away from children.
2. Cured silicone rubber can be handled without anyrisk to health.
3. Should uncured silicone sealant contact with eyes, rinse thoroughly with water and seek medical treatment if irritation persists.
4. Avoid prolonged exposure of skin to uncured silicone sealant.
5. Good ventilation is necessary for work &cure places.

Disclaimer
The information presented herein is offered in good faith and is believed to be accurate. However, because conditions and methods of using our products are beyond our control, this information should not be used in substitution for customer's tests to ensure that our products are safe, effective, and fully satisfactory for intended specific applications.

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