DOWSIL™ 3363 Two component Silicone Insulating Glass Sealant

Short Description:

Two-part silicone sealant with high strength for use as a secondary seal in insulating glass units.

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Features &Benefits

1. Economical joint sizes in high strength IG applications

2. High design strength (0.21 MPa) allowing joint size reduction up to 30%

3. Enhanced productivity with reduced joint dimensions

4. European Technical Approval (ETA13/0359)

5. Suitable for gas-filled triple glazed units and gas-filled double glazed units

6. Structural capability as secondary sealant for insulating glass in structural glazing applications  Outstanding adhesion to a wide range of substrates including coated and reflective glasses, aluminum and steel spacers, and a variety of plastics

7. Meets EN 1279 part 4 and 6 and EN 13022

8. Tested according to EN 15434

9. Meets the requirements of CEKAL

10. Low water absorption

11. Excellent temperature stability: -50°C to 150°C

12. Non-corrosive cure

13. Fast curing time

14. Outstanding resistance to ozone and ultraviolet (UV) radiation

15. High modulus which limits the stress on the primary sealant and makes it particularly suited for gas-filled insulating glass units

Applications

1. DOWSIL™ 3363 Insulating Glass Sealant is a high strength secondary two-part silicone sealant specifically designed for high strength applications, where conventional sealants with lower strength would lead to increased joint sizes. It enables economical joint sizes in highly demanding insulating glass (IG) applications such as: high wind in tall buildings, hurricane loads, cold-bent glass or high impact loads such as bomb blast. Smaller joint dimensions can be filled faster and therefore lead to productivity enhancements.

2. DOWSIL™ 3363 Insulating Glass Sealant is ideal as a secondary sealant for triple and double glazed units and meets EN 1279 requirements for gas-filled IG.

3. DOWSIL™ 3363 Insulating Glass Sealant can be used in IG applications for structurally glazed facades. It is UV resistant, provides long-term durability and excellent adhesion to glass and IG spacers.

How to Use

Mixing and Dispensing Instructions：DOWSIL™ 3363 Insulating Glass Sealant should be mixed in a ratio of 10:1 base to curing agent by weight. At this mix ratio, the sealant typically exhibits a working time of 5–10 minutes and allows units to be handled within two hours. Slight variations in mixing ratio can be tolerated, but these should not exceed 11:1 to 9:1 by weight to ensure minimum properties are obtained. The sealant is compatible with most of DOWSIL™ neutral curing sealants. Please contact our technical services department for more information.

Mixing and Dispensing Instructions：To achieve the best mechanical properties of DOWSIL™ 3363 Insulating Glass Sealant, it is recommended that the base and curing agent are thoroughly mixed using an airless mixing system found on most existing commercially available two-part silicone dispensing machines.

Equipment Cleaning：When not being used it is recommended that the dispensing equipment be purged either with the uncatalyzed base, or flushed with a suitable solvent such as DOWSIL™ 3522 Cleaning Solvent Concentrated. If cured sealant has built up inside the equipment it is recommended to flush the equipment for the appropriate time with DOWSIL™ 3522 Cleaning Solvent Concentrated. This solvent dissolves cured silicone sealant and provides optimum cleaning performance.

Typical Properties

Test1	Property	Unit	Result
DOWSIL™ 3363 Insulating Glass Sealant Base: as supplied
	Color and consistency		White, viscous paste
	Specific gravity		1.38
DOWSIL™ 3363 Insulating Glass Sealant Curing Agent: as supplied
	Color and consistency		Thick black paste
	Specific gravity		1.05
	Viscosity (60 s-1)	Pa.s	7.5
As mixed
	Color and consistency		Black non-slump paste
	Working time (25°C, 50% R.H.)	minutes	5–10
	Snap time (25°C, 50% R.H.)	minutes	10–30
	Specific gravity		1.33
	Corrosiveness		Non-corrosive
ISO 8339	Tensile strength	MPa	1.5
EN 1279-6	Durometer hardness, Shore A		60
ETAG 002	Design stress in tensionDesign stress in static shearElastic modulus in tension or compression	MPaMPaMPa	0.210.0114.8
EN 1279-4	Water vapor permeability (2.0 mm film)	g/m2/24h	18
EN 1279-4	Gas permeability	g/(m2h)	0.46

Packaging Information

Lot matching of DOWSIL™ 3363 Insulating Glass Sealant Base and DOWSIL™ 3363 Insulating Glass Sealant Curing Agent is not required. DOWSIL™ 3363 Insulating Glass Sealant Base is available in 250 kg drums. DOWSIL™ 3363 Insulating Glass Sealant Catalyst is available in 25 kg pails.