PR-888 · Premium

Premium Neutral Curtain Wall Weatherproof Sealant

Top-tier weatherproof sealant passing all three durability adhesion tests — maintained extension, after water immersion, and after cold-draw hot-compression cycling.

Product Standard	GB/T 14683-2017
Cure System	Neutral Cure
Packaging	300mL cartridge, 590mL sausage
Shelf Life	12 months from production date
Transport	Non-hazardous goods
Storage	Dry, ventilated, cool place

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Technical Data

Density	1.43 g/cm³
Extrusion rate	519 mL/min (min. 150)
Tack-free time	1.2 h (max. 3)
Sag resistance (vertical)	0 mm (max. 3)
Elastic recovery rate	92% (min. 80)

Tensile modulus at 23°C	0.9 MPa (>0.4 / >0.6)
Adhesion at maintained extension	No failure
Adhesion after water immersion	No failure
Adhesion after cold-draw / hot-compression	No failure
Mass loss rate	4.2% (max. 8)

Typical values obtained under laboratory conditions (23°C / 50% RH) and not intended for specification purposes. Tested to GB/T 14683-2017 — Report No. 2022MF117. Download the full test report on request.

Product Characteristics

Passes all three durability adhesion tests: maintained extension, water immersion and cold-draw / hot-compression
Highest tensile modulus in the weatherproof range — 0.9 MPa
High extrusion rate of 519 mL/min for productive gunning
92% elastic recovery for dynamic facade joints
Low mass loss rate of 4.2% — excellent heat ageing
Non-corrosive neutral cure, wide substrate compatibility

Applications

Curtain wall and facade perimeter sealing
Premium exterior window and door systems
Expansion joints in high-rise buildings
Marine and coastal projects with high humidity

Limitations

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

Application Scope

Where PR-888 Is Used

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-888

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 300 mL cartridge or 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-888

What is PR-888 used for?

Curtain wall and facade perimeter sealing, premium exterior window and door systems, expansion joints in high-rise buildings, and marine or coastal projects with high humidity.

What makes PR-888 the premium grade?

It passes all three durability adhesion tests: adhesion at maintained extension, adhesion after water immersion, and adhesion after cold-draw and hot-compression cycling. Mass loss is 4.2%. Test report 2022MF117 is available on request.

What standard does PR-888 meet?

GB/T 14683-2017.

Can it be used for structural bonding?

No. It is a weatherseal product. For structural bonding where the sealant carries load, use PR-999 to GB 16776-2025.

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.