SIKA Sealant | SIKAFLEX Roof & Gutter Sealant for Exterior in 300mL Cartridge

BENEFITS

Neutral cure

Excellent adhesion to most common construction materials such as: glass, enamel, ceramics, tiles, most metal* (see Important Considerations), most plastic, rubber, concrete and grouts

Non-sag

Great tooling characteristics

Interior and exterior usage

High temperature resistance (-40°c to +150°c)

Minimum movement capability ±25%

MATERIAL APPLICATION

Roofs

Gutters

Polycarbonate roof sheeting

Around plumbing fixtures and penetrations

General interior & exterior sealing around the home

CERTIFICATIONS

AS/NZS 4020:2018 - Water Potable Approved

TECHNICAL

Shore A hardness
Translucent ~26
Colours ~46

Movement capability
Translucent ±25%
Colours ±50%

Service temperature
-40°C to +150°C

Curing rate
~3-4 mm per 24 hours (+23°C / 50% r.h.)

PREPERATION

"The substrate must be clean, dry, sound and free from oils, grease, dust, cement laitance and loose or friable particles. For optimum adhesion, joint durability and critical, high performance applications such as joints on multi-storey buildings, highly stressed joints, extreme weather exposure or water immersion/exposure. The following priming and/or pre-treatment procedures must be followed: "

Non-porous substrates : Float glass, coated glass, anodised aluminium and stainless steel must be pre-treated using Sika® Aktivat-or-205 or Sika® Aktivator-100. Powder coated and PVDF coated metals must be pre-treated using Sika® Aktivator-205. For more details such as application and flash-off times, refer to the most recent Product Data Sheet of the respective pre-treatment product.

APPLICATION

Sikaflex®-291 can be processed between 5 °C and 40 °C but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and sealant is between 15 °C and 25 °C.

Sikaflex®-291 can be processed with hand, pneumatic or electric driven piston guns as well as pump equipment. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with Sika® Remover-208 immediately after use. Hardened material can only be removed mechanically. For cleaning skin, use Sika® Cleaning Wipes-100.