Soudal Multibond SMX25 Flex & Seal 290ml

Soudal Multibond SMX25 Flex & Seal is a high quality, low modulus, single component, permanently highly flexible joint sealant with a higher viscosity. It is based on SMX polymer and accommodates movement of +/-25%, making it ideal for internal and external applications where joints move. SMX25 has excellent UV resistance and elasticity, can be sanded and painted with most types of paint, and once cured forms a strong, flexible, waterproof seal that bonds to a wide range of substrates, including damp and wet surfaces.

Key Features

• Low modulus hybrid sealant based on SMX polymer
• Accommodates joint movement of +/-25%
• Higher viscosity for stable application in vertical joints
• Excellent UV resistance and elasticity
• Can be sanded and painted with most types of paint
• Strong, flexible, waterproof seal once cured
• Bonds to the widest range of substrates, including damp and wet surfaces

Specifications

• Base: SMX polymer, low modulus, single component
• Hardness: Shore A 25
• Joint movement: +/-25%
• Application: internal and external
• Colour: concrete grey
• Pack size: 290ml cartridge

Applications

• Expansion joints and masonry and precast concrete joints
• Sanitary, bathroom and kitchen areas (resists mould growth)
• Lap joints in roofing, guttering and cladding
• Air conditioning ducting, caravans, and window and door frames

What You Need To Complete The Job

SMX25 is applied with a caulking gun, so pair the cartridge with an OX caulking gun 230mm or the Uni-Pro no-drip caulking gun. For a higher-movement sealant in a 600ml sausage use Soudal Multibond SMX35 Seal & Stretch. Browse the full Sealants range for the complete system.

Frequently Asked Questions

What does low modulus mean?

A low modulus sealant stays soft and flexible after curing, so it can stretch and compress with joint movement without putting stress on the substrate. That is what lets SMX25 handle +/-25% movement.

Why is the higher viscosity useful?

The higher viscosity keeps the sealant in place in vertical and overhead joints, so it does not sag or run before it skins. That makes it easier to tool a clean joint profile.

Can I use it on a roof?

Yes. It is suited to lap joints in roofing, guttering and cladding, as well as wall and perimeter joints. For a dedicated roof and gutter silicone, see the Soudal Roof & Gutter Silicone.

Can it be painted?

Yes. Once cured, SMX25 can be sanded and painted with most types of paint, so the joint can be finished to match the surrounding surface.

Can I order for delivery or pickup?

Yes. You can order online and choose Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. Delivery windows depend on your postcode, and we send a confirmation once your order is ready. For any questions call (03) 93941400 or email orders@singhroofingsupplies.com.au.