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Our export team attended the autumn Canton Fair this year. We did not take a booth — we went to meet the distributors, importers and…
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ISO 9001 Certified · Direct Factory Since 2017
Silicone Sealant Manufacturer
in China for OEM & Wholesale
PIROI — Zhongshan Pinrui Adhesive Technology Co., Ltd., a silicone sealant & silicone adhesive manufacturer in China. Neutral, structural, weatherproof and fire-rated sealant range.
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Company Film
Inside Our Silicone Sealant Factory in Zhongshan
Three minutes inside our manufacturing base — raw material warehousing, automated filling lines, laboratory colour matching and export packing. Filmed on site, no stock footage.
Featured Products
Best-Selling Neutral Silicone Sealant & Weatherproof Silicone Sealants
Neutral silicone sealant, weatherproof silicone sealant and construction sealant — 17 models across 4 series, recognized in annual inspections. Stable quality control, OEM & private label available.
Structural
PR-999
Neutral Structural Silicone Sealant for Curtain Wall
One-component neutral cure structural sealant for glass, aluminum panel and terracotta curtain walls. Excellent mechanical properties and weather resistance.
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Premium
PR-888
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.
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Curtain Wall
PR-520
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.
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Weatherproof
PR-333
Weatherproof Window and Door Sealant
Weatherproof window and door sealant for frame fabrication — durable seal, excellent adhesion, long-term outdoor performance.
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Premium
PR-638
Premium Weatherproof Silicone Sealant
High-performance premium weatherproof sealant. Superior durability for demanding exterior applications, curtain wall perimeter and facade sealing.
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Fire Rated
PR-238
Fire-Rated Silicone Sealant
High temperature fire-rated sealant. Interior and exterior use, for fire-rated joints, cable penetrations and fire door sealing applications.
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New Energy
PR-338
Solar PV Silicone Sealant
Specialized sealant for solar photovoltaic panel installation. UV resistant, weatherproof, durable sealing for renewable energy infrastructure.
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Appliance
PR-268
Appliance Silicone Sealant
Specialty sealant for home appliance manufacturing. RoHS compliant, suitable for range hoods, ovens, induction cookers, disinfecting cabinets.
View DetailsISO
9001:2015 Certified
Fire-Rated vs Regular Sealant · Flame Test
About PIROI
Based in the Heart of Manufacturing,
Dedicated to Sealing the Future
Zhongshan Pinrui Adhesive Technology Co., Ltd. (PIROI), established in the industrial hub of Zhongshan within the Guangdong-Hong Kong-Macao Greater Bay Area, is a professional silicone sealant and silicone adhesive manufacturer integrating R&D, production, sales, and technical services.
Since our inception, we have consistently adhered to our core philosophy of "Excellence in Quality, Wisdom in Bonding the Future," focusing on providing high-performance, highly reliable silicone sealant solutions for the global construction, industrial, household, and new energy sectors.
- One-on-one engineer service for design & technical support
- Mature craftsmanship, one-stop from design to assembly
- Export packaging experience for global markets
- Samples available before bulk production
OEM & ODM Service
Custom Adhesive & Sealant Solutions for Your Brand
We handle the complete OEM process — formula development, colour matching, private label printing and export packaging. Send us your specification or a competitor sample and our lab will match it. FORM E certificate and Vietnamese / English labels available.
- Custom formulation — matched to your substrate, climate and curing requirement
- Private label printing — your logo, colour card, barcode and language on cartridge or sausage
- Customized packaging — colour box, display carton, shrink wrap and pallet configuration
- MOQ from 1,000 pcs — flexible for first trial orders, ideal for Vietnamese and Southeast Asian distributors
1,000+
MOQ · Private Label Ready
How We Work
How We Work Together
A transparent four-step process — from your first enquiry to repeat orders, with FORM E documentation support for ASEAN.
01
Send Your Requirement
Tell us the substrate, joint type, annual volume and destination port. Attach a competitor sample if you have one — we will analyse it.
02
Formulation & Free Sample
Our lab matches the formulation to your climate and compliance requirement, then ships free samples for your approval before any production.
03
Mass Production
8 automated filling lines with in-process checks and batch testing. Standard lead time is 15 days for contract orders.
04
Export & After-Sales
Private label printing, export cartons, FORM E certificate and full shipping documents. Sea freight to Ho Chi Minh / Bangkok / Port Klang in 7–15 days. Replacement or credit for any confirmed quality issue.
Product Application
Silicone Sealant Applications — Construction, Glazing & Industry
Construction sealant, window and door, glass and glazing, sanitary, appliance and fire-rated applications — each matched with the right formulation and compliance standard.
Structural Silicone Sealant for Curtain Wall
Structural glazing, high-rise curtain wall bonding and weatherproofing.
Window and Door Sealant
Window and door sealant for fabrication, weatherproof sealing and fast cure.
Sanitary Silicone Sealant
Anti-mold sealing for bathroom, kitchen and wet areas.
Appliance Silicone Sealant
Electronic and appliance assembly sealing, non-corrosive formula.
Fire-Rated Silicone Sealant
Fire stopping for curtain wall, cable trays and door frames.
Glass and Glazing Sealant
Insulating glass, skylight and decorative glass sealing.
Why Choose Us
Five Reasons Southeast Asian Buyers Choose PIROI
Built for Southeast Asian importers: FORM E documentation support, tropical-grade formulations and 7–15 day sea freight.
8+
Years in Export OEM
01
Factory Direct + FORM E Documentation
Quoted straight from our own plant in Zhongshan — no trading margin. We prepare the FORM E certificate of origin documentation for eligible shipments under the China-ASEAN FTA, so ASEAN importers can apply for preferential duty treatment instead of the standard MFN rate. Duty treatment depends on the destination country and HS code — confirm with your customs broker.
02
Tropical Climate Formula
Formulations engineered for 80%+ humidity, intense UV and monsoon rain — resistant to mould growth, yellowing and adhesion loss. The same formula fails in Europe and works for ten years in Vietnam, which is exactly the point.
03
Certified & Locally Compliant
ISO 9001:2015 quality system, tested to GB 16776, GB/T 14683, JC/T 885 and ASTM C920. We also assist with local approval — Vietnam TCVN, Malaysia SIRIM, Indonesia SNI, Thailand TIS — and supply third-party test reports for your customs file.
04
Anti-Mold Range Built for Humid Markets
17 models across 4 series, led by the sanitary anti-mold line that moves fastest in Vietnam, Thailand and Indonesia. Grade-0 mildew resistance for kitchens, bathrooms and wet areas.
05
7–15 Days to Southeast Asia, Full Documents
Direct sea freight from Shenzhen / Nansha to Ho Chi Minh, Bangkok, Port Klang and Jakarta in 7–15 days. Every shipment ships with FORM E, packing list, COA and test reports — no chasing paperwork.
About PIROI Adhesive
Silicone Sealant & Silicone Adhesive Manufacturer Since 2017
Zhongshan Pinrui Adhesive Technology Co., Ltd. integrates R&D, production, sales and technical service. Our 20,000 m² plant operates 8 automated filling lines serving 30+ export markets — with Southeast Asia as a core market. The in-house laboratory matches formulations to your substrate, climate and local compliance requirement.
20,000m²
Factory Area
8lines
Automated Lines
30+
Export Markets
2017
Established
Certification
Certified, Tested & Traceable
Independently tested and certified. Full documentation available on request.
Featured Credential
2026 Annual Inspection Qualified Product
Industry Recommended Product for Architectural Silicone Structural Sealants
- PR-999 Neutral Structural Silicone Sealant is listed as No. 94 in the 2026 qualified product catalogue
- Issued by the Aluminum Window & Curtain Wall Branch, China Building Metal Structure Association
- Independently sampled and tested annually — valid until 31 December 2026
ISO 9001:2015
Quality Management
GB 16776
Structural Glazing
RoHS
Test Report
2026 Annual Inspection
Industry Recommended Product
Transport Safety
Export Certificate
60+
Export Markets
Partnership
Who We're Looking For
We work with partners who value consistent quality and long-term supply, not one-off transactions. If you are one of the following — particularly in Vietnam, Thailand, Malaysia, Indonesia or the Philippines — we can support you with samples, FORM E documentation and private label service.
- Distributors & Wholesalers — regional distribution rights, stable supply and competitive factory pricing.
- Construction Contractors — project-based supply with matching compliance documents and technical support.
- OEM / Private Label Brands — your logo, cartridge, colour and packaging language, from 1,000 pieces.
- Trading Companies — flexible MOQ, export packaging and full shipping documents.
News & Insights
News, Company Updates & Technical Know-How
Follow PIROI's latest milestones, global customer projects and expert guidance on selecting and applying silicone sealants.
TechnicalTechnical Articles
PR-333 vs PR-666 Silicone Sealant: Which One to Specify
Two neutral cure weatherproof silicone sealants, both available in 300 mL cartridges and 590 mL sausages, both non-hazardous for transport, both with a 12-month shelf…
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Waterproof Silicone Sealant: Specs That Matter Outside
Waterproofing sealant is not a product category with one performance figure behind it. A silicone sealant can be excellent at keeping rain out of a…
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Request a Quote or Free Sample
Tell us your substrate, annual volume and destination port. Our engineers reply within 24 hours with a matched formulation.
Why buy from PIROI
✓
Factory-direct pricing
Quoted from our own plant — no trading margin.
✓
Free samples
Test the formulation before bulk order.
✓
Custom formulation
Matched to your substrate and climate.
✓
Export packaging
Private label, colour and language customization.
Direct factory contact
+86 18125397156
Email
info@zspiroi.com