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A.K. BITUMEN PRODUCTS
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Waterproofing of Expansion Joints

Waterproofing of Expansion Joints Specification

Shelf Life
12 months when stored in unopened original container

Chemical Resistance
Resistant to mild acids, alkalis, and saltwater

Type
Waterproofing of Expansion Joints

Non-Toxic
Safe for use in potable water structures

Joint Primer
Recommended for porous substrates

Maintenance
Minimal, easy to inspect and repair if necessary

Crack Bridging Ability
Excellent accommodates structural movements

Installation Method
Manual application, using caulking gun or spatula

Packaging
Cartridges, sachets, or pails

Standards Compliance
ASTM C920, EN 14187-4

Adhesion Strength
High adhesion to concrete, stone, and metal

Durability
UV resistant, weather resistant, maintains flexibility

Waterproofing Material
Elastomeric joint sealants, polyurethane-based or polysulphide-based systems

Curing Time
24-48 hours depending on material and ambient conditions

Surface Preparation
Clean, dry, free from dust, grease, or loose particles

Colour
Standard: Grey, Black; Custom on request

Movement Accommodation
Up to 25% of joint width

Application Area
Expansion joints in concrete, masonry, or structural slabs

VOC Content
Low VOC formulation

Service Temperature
-25C to +80C

Thickness of Application
Varies according to joint width (typically 5mm to 50mm)

Compatibility
Suitable for both horizontal and vertical surfaces

About Waterproofing of Expansion Joints

Expansion joint waterproofing isthe process of sealing gaps (expansion joints) between structural elements to prevent water infiltration, protecting the structure from damage like mold growth, rust, or weakening of materials.

Expansion joints (also known as movement joints) are planned gaps or breaks in a structure, like between sections of concrete slabs or walls, designed to allow for the expansion and contraction of materials due to temperature changes or other factors.

They are crucial for preventing cracks and damage to the structure as materials expand and contract.
Why is Waterproofing Important?
If not properly sealed, expansion joints can become vulnerable to water infiltration, leading to various issues.

Water can seep through the joint, causing damage to the structure, and leading to mold growth, rust, and weakening of materials.

Superior Flexibility and Crack Bridging

Engineered to accommodate significant structural movement, these sealants bridge cracks and expand or contract with the joint, preventing leaks and maintaining a lasting watertight seal. Their excellent elasticity ensures functionality in both horizontal and vertical applications, even under rigorous weather or UV exposure.

Long-Lasting and Chemically Resistant Protection

Tested to withstand exposure to mild acids, alkalis, and saltwater, our expansion joint waterproofing systems offer exceptional durability. The advanced formulations resist deterioration over time, supporting performance in aggressive environments such as industrial floors, water treatment facilities, or exterior building facades.

FAQ's of Waterproofing of Expansion Joints:

Q: How is the waterproofing material applied to expansion joints?

A: The waterproofing material is manually applied using a caulking gun or spatula, after thorough surface preparation. Joints should be clean, dry, and free from dust, grease, or loose particles. Application thickness typically ranges from 5mm to 50mm depending on the joint width.

Q: What are the main benefits of using this expansion joint waterproofing system?

A: Key benefits include high adhesion to various substrates, excellent crack bridging and movement accommodation (up to 25%), chemical resistance, low VOC emissions, and long-term flexibility. The sealant is also non-toxic, making it suitable for use in potable water structures, and requires minimal maintenance.

Q: Where can this waterproofing solution be used?

A: This product is designed for expansion joints in concrete, masonry, or structural slabs, and is suitable for both horizontal and vertical surfaces. Common applications include bridges, parking decks, water reservoirs, and other structural joints exposed to movement and environmental stresses.

Q: When does the waterproofing sealant achieve full curing, and what is the shelf life?

A: The sealant typically cures within 24-48 hours, depending on the specific product formulation and ambient conditions. When stored in its original unopened container, the product maintains a shelf life of up to 12 months.

Q: What standards does this expansion joint waterproofing meet?

A: Our products conform to ASTM C920 and EN 14187-4 standards, ensuring reliable performance and quality for construction and infrastructure applications.

Q: Can this material be customized for color or packaging?

A: Yes, while standard colors are grey and black, custom colors can be provided on request. The sealant is available in cartridges, sachets, or pails to suit project requirements.

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