China Rubber Butyl Waterstop Sealant Strip Double Sided Soft Type

Product Description

The water swelling strip (hydrophilic waterstop) is made of rubber compounded with super absorbent resin. It expands upon water contact, automatically filling gaps in concrete construction joints and expansion joints to form a reliable waterproof seal.

Key Features

—Water-swellable: Volume expansion rate controllable (2–5 times), fills gaps upon water contact to reduce water seepage paths

—Flexible installation: Can be fixed by nailing, adhesive bonding, or embedding; standard construction tools are sufficient

—Water pressure resistance: After swelling, it provides a certain level of resistance to water pressure, suitable for underground environments

—Durability: The material offers good aging and corrosion resistance, with a long service life under normal conditions

—Self-sealing property: After swelling, it can fill small cracks caused by settlement or deformation, reducing water leakage paths

Technical Parameters (Reference Values)

Physical Properties of PZ Type Water Swellable Waterstop Strip
Item		Index
		PZ-150	PZ-250	PZ-400	PZ-600
Hardness (Shore A)/degrees		42±10		45±10	48±10
Tensile strength(Mpa) ≥		3.5		3
Elongation at break(%)≥		450		350
Volume swell ratio(%)≥		150	250	400	600
Repeated water immersion test	Tensile strength(Mpa) ≥	3		2
	Elongation at break(%) ≥	350		250
	Volume swell ratio(%)≥	150	250	300	500
Low temperature bending (-20°Cx2h)		No crack
Physical performance parameters of PN type water swelling waterstop strip
Item		Index
		PN-150	PN-220	PN-300
Volume swell ratio(%)≥		150	220	300
High-temperature flow resistance(80°Cx5h)		No flow
Low temperature Test(-20°Cx2h)		No embrittlement

Applications

—Construction joints of basement slabs, side walls, and roof slabs
—Expansion joints in tunnels, culverts, and subway projects

—Movement joints of water tanks, water treatment plants, and sewage tanks

—Joints of precast concrete elements

—Other cast-in-place concrete joints requiring self-sealing function

Construction Precautions

1.Keep the strip surface clean and dry before installation, free from oil and loose dust.

2.Fix the strip at the predetermined position in the concrete joint to prevent displacement during concrete pouring.

3.If the strip gets wet before installation, let it dry naturally in a dry and ventilated place to avoid premature swelling.

4.Store the product in a cool, dry indoor environment, away from direct sunlight and organic solvents

Common Section Shapes

Different joint configurations require different cross-section shapes. The following are common types, and custom shapes are also available upon request.

FAQ

1.What is the working principle of the water-swellable waterstop strip?

The water -swellable waterstop strip gradually expands in volume upon contact with water, flling gaps in concreteconstruction joints, pipe joints, and other locations, forming a physical water barrier to achieve water sealing.

2.What is the difference between PZ(BF) Type (red) and PN(BW) Type (black)?

The PZ(BF) Type (red) is a preformed material with certain hardness and elasticity. Its shape remains stable afterexpansion and is suitable for regular and flat construction joints. The PN(Bw) Type (black) is a soft, sticky material thatcan conform to irregular surfaces and is suitable for pipe joints, complex joints, and other applications

3.How soon can we receive a quotation after sending an inquiry?

Upon receiving clear and complete inquiry information (such as drawings, specifications, and quantities), we typicallyprovide an initial quotation or proposal within 24 hours. For complex projects, we will communicate the required timewith you promptly

4.What other products does your company offer in addition to water-swellable waterstop strips?

As a comprehensive solution provider, our product line also includes: waterstops (PVC waterstops, rubber waterstops,etc.), laminated rubber bearings for bridges, rubber pads, pot bearings, spherical bearings, seismic isolation bearings,bridge expansion joints, as wellas sealants (polyurethane, polysulfide) and fexible pipes for building isolation We arecommitted to providing various key components for civil engineering.

5.Is the product quality guaranteed?Yes We provide quality assurance for our products upon delivery. Strict control standards are implemented in all stagesfrom raw material procurement to manufacturing, ensuring product performance meets technical specificationrequirements

6.What management system certifications does your company have?Our company has established and operates a comprehensive management system and has obtained qualitymanagement system certification (e.g, ISo 9001), environmental management system certification (e.g, ISo 14001),and occupational health and safety management system certification (e.g., IS0 45001)