PR-333 · Weatherproof

Weatherproof Window and Door Sealant

Weatherproof window and door sealant for frame fabrication — durable seal, excellent adhesion, long-term outdoor performance.

Product Standard	JC/T 485-2007
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	1.56 g/cm³
Extrusion rate	210 mL/min (min. 50)
Tack-free time	1.2 h (max. 72)
Sag resistance (vertical)	0 mm (max. 2)

Sag resistance (horizontal)	0 mm (max. 2)
Elastic recovery rate	92%
Tensile modulus	0.7 MPa

Typical values obtained under laboratory conditions (23°C / 50% RH) and not intended for specification purposes. Tested to JC/T 485-2007 — Report No. 2025ME158. Download the full test report on request.

Product Characteristics

Weather resistant for outdoor durability
Specifically for window & door fabrication and installation
Excellent adhesion to glass, aluminum, stainless steel
Generally no primer needed after curing
Good aging resistance for long service life
Transport as non-hazardous goods

Applications

Door and window fabrication & installation
Glass and aluminum joint sealing
Stainless steel and metal panel joints
General construction sealing

Limitations

Not for use as structural sealant
Do not apply on damp surfaces
Not for long-term water immersion
Apply at 4°C to 40°C

Application Scope

Where PR-333 Is Used

PR-333 Weatherproof Window and Door Sealant — silicone sealant application by PIROI

PVC Window & Door Profiles

Neutral-cure silicone sealant for PVC and uPVC window and door profiles — bonds to plasticised frames, aluminium and masonry without releasing acetic acid.

Roof Sealing & Metal Roof Seams

Weatherproof neutral-cure silicone sealant for metal roof seams, flashings, ridge and verge joints and roof-mounted solar — no slump on sloped joints.

HVAC & Ductwork

Silicone sealant for HVAC ductwork, air handling units and refrigeration lines — airtight, thermally stable, low outgassing.

Ordering Information

MOQ, Lead Time & Private Label — PR-333

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-333

What is PR-333 used for?

Door and window fabrication and installation, glass and aluminium joint sealing, stainless steel and metal panel joints, and general construction sealing.

How much movement can PR-333 accommodate?

Elastic recovery is 92%, with a 0.7 MPa tensile modulus and 0 mm sag on both vertical and horizontal joints. That combination lets the joint move with the frame and return to shape instead of creeping open.

What standard does PR-333 meet?

JC/T 485-2007 (window and door elastic sealant, classification SR 3 MG AK). Test report 2025ME158 is available on request.

Can it be used as a structural sealant?

No. PR-333 is a weatherseal product for frame and glazing joints. For structural bonding where the sealant carries wind 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.