SpECseal 625

Two-part polysulphide joint sealant for dynamic joints.

Name: SpECseal 625
Brand: SpEC
Availability: InStock

SpECseal 625 is a two-part, low modulus polysulphide joint sealant designed specifically for dynamic joints. Curing to form a tough, rubber-like seal, it provides exceptional adhesion and flexibility, ensuring a reliable seal under various conditions. This product is suitable for both horizontal and vertical applications, ensuring durability and performance in demanding environments.
Its easy application makes it an ideal choice for construction and civil engineering projects.

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Technical Details

The typical uses of SpECseal 625 include:
– Sealing and resealing high movement joints in building structures.
– Sealing joints in civil engineering structures subject to high rapid movements.
– Applications in areas exposed to dynamic loading or movement.
– Suitable for horizontal, vertical, and overhead applications.

The advantages of SpECseal 625 make it an outstanding choice for various sealing applications. Its unique formulation provides a resilient and durable solution tailored for dynamic joints, ensuring long-lasting performance under challenging conditions.
– Tough and resilient seal.
– Provides a permanent and uniform water-tight seal.
– Excellent adhesion to most surfaces.
– Stays flexible, preventing brittleness or cracking due to UV exposure.
– Good chemical and weathering resistance.
– Non-toxic once cured.
– High resistance to ageing.

The technical information for SpECseal 625 is vital for understanding its performance and application characteristics:

Volume Shrinkage	0.4%
Effect of Heat Ageing	1.14%
Solids Content	100%
VOC (USEPA 24)	1.29 g/l
Specific Gravity	1.55 – 1.65
Colour	Grey
Hardness (Shore ‘A’)	20 ± 5 @ 25°C
Pull-off Strength	0.86 N/mm²
Tensile Strength	0.30 N/mm²
Elongation @ Break	1386%
Pot Life	2 hours at 25°C
Curing Time (Tack Free)	24 hours @ 25°C
Full Cure Time	7 days at 25°C
Application Temperature Range	Minimum 0°C – Maximum 90°C

The application process for SpECseal 625 is crucial for achieving optimal performance and durability:

Joint Preparation:
The joint surface must be clean, dry, and free from oil, loose mortar, laitance, release agents, and other contaminants. A thorough wire brushing, grinding, sand blasting, or solvent cleaning may be required to expose a clean, sound surface.
Mixing:
SpECseal 625HD is supplied in 2.5 litre composite packs with the base and curing agent placed in the tin ready for mixing. The components should be mixed for a minimum of 5 minutes to achieve a uniform color, free from streaks. Mixing should occur using a slow speed drill (300-400 rpm) fitted with a SpECseal paddle mixer. Do not part mix.
Application:
Soon after mixing, load the SpECseal 625HD into a SpEC 600 ml solid barrel gun using a steel follower plate. Protect the joint faces with masking tape to facilitate tooling. SpECseal 625 should be poured or gun applied firmly into the joint to ensure positive contact with the joint faces. The sealant should then be tooled off to compact it against the joint sides, and the masking tape removed immediately after tooling.
Priming:
For optimal adhesion, apply SpECseal Primer 25 on porous and non-porous surfaces prior to installation. The freshly mixed SpECseal 625 should be applied after the primer solvent has been released and it is just touch dry. Apply the sealant ½ – 2½ hours after priming, but if the primer is left to dry longer than 2½ hours, the surfaces must be re-primed before applying the sealant.

The packaging details for SpECseal 625 are as follows:
SpECseal 625HD: Supplied in 2.5 litre tins.
SpECseal 625P: Supplied in 4.0 litre tins.
SpECseal Primer 25: Supplied in one litre 2-part packs.

For warranty information regarding SpECseal 625, please contact our team at SMCC using any of the available contact methods on this page for more details.

Product FAQ

What surfaces can SpECseal 625 be applied on?

SpECseal 625 can be applied on most surfaces, including porous materials like concrete and masonry, as well as non-porous surfaces such as metals and glass, ensuring excellent adhesion and flexibility.

How does SpECseal 625 perform in extreme temperatures?

SpECseal 625 maintains performance in temperatures from 0°C to 90°C, ensuring flexibility and adhesion under varying conditions without compromising seal integrity.

What is the curing time for SpECseal 625?

The curing time for SpECseal 625 is 7 days at 25°C, with a tack-free time of 24 hours.

What is the pot life of SpECseal 625?

The pot life of SpECseal 625 is 2 hours at 25°C.

What is the chemical resistance of SpECseal 625?

SpECseal 625 exhibits excellent chemical resistance to UV and ozone, staining, and various acids including sulfuric, hydrochloric, and nitric acids. It also resists sodium and ammonium hydroxides, fuels, oils, sewage water, and subkha sand.

What are the application methods for SpECseal 625?

SpECseal 625 can be applied using two methods: gun application and pouring. For gun application, the sealant is loaded into a solid barrel gun and applied directly into the joint, ensuring positive contact with the joint faces. For pouring, the sealant is poured directly into the joint. Both methods require proper joint preparation and mixing before application for optimal results.