Ultra Seal PU 500 is a one-component, non-sag, polyurethane-based sealant that cures by reacting with moisture in the air to form a durable, highly elastic, low-modulus sealant with excellent tear, wear, and weather resistance.
Ultra Seal PU 500 is designed for sealing:
- Construction joints
- Expansion joints
- Basement walls
- Precast concrete elements
- Vertical and horizontal joints
- Interior and exterior building joints
Ultra Seal PU 500 adheres to a wide variety of building materials, including:
- Concrete
- Wood
- Marble
- Natural stone
- Aluminum
- Steel
- Ceramic
- Gypsum boards
- Other common construction substrates
Key benefits include:
- One-component formulation
- Excellent adhesion without primer on many substrates
- High elasticity
- Excellent water resistance
- Wide service temperature range
- Paintable after curing
- Excellent aging resistance
- High tear and wear resistance
- Good resistance to microorganisms
- Resistant to various chemicals
- Easy and economical application
Yes. Ultra Seal PU 500 provides excellent water resistance, making it suitable for sealing joints exposed to moisture and outdoor weather conditions.
Yes. Its non-sag consistency makes it ideal for both vertical and horizontal joint sealing applications.
In most cases, no. It offers excellent adhesion to clean, dry, and sound substrates without a primer. However, primers are recommended for porous surfaces, non-porous surfaces requiring maximum adhesion, and joints that will remain continuously submerged in water.
The substrate should be:
- Clean
- Dry
- Free from dust
- Free from oil
- Free from grease
- Free from contaminants
If necessary, clean surfaces with methyl ethyl ketone (MEK), acetone, or a suitable grease remover before application.
Yes. Ultra Seal PU 500 is paintable using most standard construction paints. However, a compatibility test is recommended before full application.
Ultra Seal PU 500 complies with:
- ISO 11600 Type F Class 25 LM
- ASTM C920 Type S Grade NS Class 25 Use NT, T1, A, M and I
Ultra Seal PU 500 accommodates joint movement of ±25%, making it suitable for expansion and movement joints.
Ultra Seal PU 500 provides an elongation at break of 800% or greater, delivering exceptional flexibility and crack resistance.
The sealant achieves a tensile strength of 1.8 MPa or higher after 7 days, providing durable and reliable performance.
Ultra Seal PU 500 becomes tack-free in approximately 1 to 3.5 hours at 23°C and 50% relative humidity.
The sealant cures at approximately 2.5–3.5 mm per day, depending on temperature and humidity.
- Application temperature: 5°C to 50°C
- Service temperature: -30°C to 90°C
It remains flexible even at temperatures as low as -30°C.
Yes. Long-term UV exposure may slightly reduce surface gloss, but it does not affect the sealant's performance or durability.
Install a polyethylene backing rod to control joint depth, apply the sealant using a suitable applicator, and tool the sealant immediately after application for a smooth finish. The recommended width-to-depth ratio is 2:1, with a minimum sealant depth of 5 mm.
Clean tools immediately using paper towels followed by acetone, xylene, or another suitable solvent before the sealant cures.
Ultra Seal PU 500 is supplied in convenient 600 ml sausage packs.
The product has a shelf life of 8 months when stored in unopened original packaging at temperatures between 5°C and 25°C. Higher storage temperatures may reduce shelf life.
Yes. Once cured, Ultra Seal PU 500 is non-hazardous. During application, avoid eye contact and flush immediately with clean water if accidental contact occurs. Seek medical attention if irritation persists.
Yes. Ultra Seal PU 500 is designed for both interior and exterior applications, offering excellent weather resistance, water resistance, elasticity, and long-term durability.
Ultra Seal PU 500 provides superior flexibility, excellent adhesion without primer on most substrates, waterproof performance, chemical resistance, UV durability, paintability, high movement accommodation, and compliance with international standards, making it an ideal sealant for demanding construction and expansion joint applications.
