PR-520 · Curtain Wall

All-Round Neutral Curtain Wall Sealant

High-modulus all-round sealant for curtain wall and facade joints. The highest extrusion rate in our range — 543 mL/min for maximum on-site productivity.

Product Standard	GB/T 14683-2017
Cure System	Neutral Cure
Packaging	590mL sausage (SR-I-F-25HM)
Shelf Life	12 months from production date
Transport	Non-hazardous goods
Storage	Dry, ventilated, cool place

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Technical Data

Extrusion rate	543 mL/min (min. 150)
Tack-free time	0.8 h (max. 3)
Sag resistance (vertical)	0 mm (max. 3)

Tensile modulus at 23°C	0.8 MPa (>0.4 / >0.6)
Adhesion at maintained extension	No failure
Classification	SR-I-F-25HM

Typical values obtained under laboratory conditions (23°C / 50% RH) and not intended for specification purposes. Tested to GB/T 14683-2017 — Report No. 2024ME302. Download the full test report on request.

Product Characteristics

Highest extrusion rate in the PIROI range — 543 mL/min (3.6x the standard requirement)
Classified SR-I-F-25HM — 25% movement capability, high modulus
All-round performance for curtain wall and facade sealing
Fast tack-free time of 0.8 hours
Adhesion at maintained extension with no failure
Excellent weathering for tropical and high-UV climates

Applications

Curtain wall and unitised facade joints
Aluminium composite panel and metal cladding
Exterior expansion and movement joints
High-rise building perimeter sealing

Limitations

Not for structural bonding
Do not apply on oily or exuding surfaces
Not for continuous water immersion
Apply at 4°C to 50°C

Application Scope

Where PR-520 Is Used

Elevator & Escalator

Silicone sealant for elevator shaft, cabin cladding and escalator truss joints — fire-rated options for shaft penetrations.

Curtain Wall & Facade

Structural and weatherseal silicone for unitized and stick-system curtain walls, tested to GB 16776 and ASTM C920.

Aluminium Composite Panel (ACP)

Silicone sealant for aluminium composite panel cladding — bonds and seals ACP panels without attacking the PE or FR core.

Ordering Information

MOQ, Lead Time & Private Label — PR-520

MOQ OEM & private label from 1,000 pcs per model

Trial Order Mixed-model trial orders from 3,000 pcs total; stock items from 500 pcs

Lead Time Typically 15–25 days after artwork and sample approval

Packaging 590 mL foil sausage pack

Shelf Life 12 months from production date

Private Label Custom cartridge artwork and colour matching supported

Not sure how many cartridges your project needs? Use the free joint width & coverage calculator →

Common Questions

FAQs — PR-520

What is PR-520 used for?

Curtain wall and unitised facade joints, aluminium composite panel and metal cladding, exterior expansion and movement joints, and high-rise building perimeter sealing. It is a weatherseal and movement joint product, not a structural adhesive.

Can PR-520 be used for structural bonding?

No. It is specified for weathersealing and movement joints. Where the sealant has to carry wind load into the frame, use a structural grade such as PR-999 to GB 16776-2025.

What standard does PR-520 meet?

GB/T 14683-2017, with a classification of SR-I-F-25HM. Test report 2024ME302 is available on request.

Why does the extrusion rate matter?

PR-520 extrudes at 543 mL/min, the highest rate in our range. On a high-rise facade where the applicator is working at height, output per cartridge translates directly into labour cost.

What is the MOQ and lead time?

Standard OEM and private label MOQ is 1,000 pcs per model, with mixed-model trial orders from 3,000 pcs total and stock items from 500 pcs. Typical lead time is 15–25 days after artwork and sample approval.