Silicone Sealant Factory in Zhongshan, China
20,000 m² manufacturing base with 8 automated filling lines, an in-house R&D laboratory and full batch traceability — direct factory supply for OEM and wholesale buyers worldwide.
Our Manufacturing Base
Production, testing, packing and warehousing — all under one roof in Huangpu Town, Zhongshan.
Production Hall
Stainless steel mixing tanks feeding 8 automated filling lines under one roof.
Raw Material Area
Batch-controlled silicone polymer and filler storage with incoming inspection.
Workshop Floor
In-process handling between filling, curing check and packing stations.
Finished Goods
Batch-coded cartons staged for container loading and export documentation.
Packing Materials
Cartridges, foil sausages, cartons and pallets held in a controlled area.
Reception & Showroom
Where visiting buyers review the full range and OEM packaging options.
Automated Filling Line
Cartridge and 590 mL foil sausage lines running in parallel under one roof.
Export Container Loading
Batch-coded cartons palletised, strapped and loaded under our own supervision.
From Raw Material to Sealed Carton
8 Automated Filling Lines
Cartridge and 590 mL foil sausage lines run in parallel, giving stable monthly output without sacrificing consistency between batches.
In-House R&D Laboratory
UV ageing chambers, tensile testers and substrate compatibility equipment. Colour matching against RAL codes within 5 business days.
Batch Traceability
Every batch is coded, tested and archived for 18 months with its own Certificate of Analysis. We can trace any cartridge back to its raw material lot.
Export Packing & Loading
Pallet configuration planned for 20 ft / 40 ft containers. Full documentation set: FORM E, packing list, COA and third-party test reports.
Testing Before Every Shipment
No batch leaves the plant untested. Retained samples are kept for 18 months alongside the Certificate of Analysis.
Sample Testing
Engineers testing retained samples before batch release.
Laboratory Bench
Cured sample strips prepared for tensile and elongation testing.
In-House Laboratory
Where formulations are matched to your substrate and climate.
Export Pallet Packing
Cartons stacked on standard pallets, ready for container loading.
Certified Factory
ISO 9001:2015
Guangdong Harmonious Certification Co., Ltd.
Valid 2026-01-26 to 2029-01-25
GB 16776-2025
CTC Suzhou · Report No. 2025ML009
Structural sealant standard
2026 Annual Inspection
China Building Metal Structure Association
PR-999 listed No. 94
AAA Credit Rating
Enterprise credit evaluation authority
Highest enterprise credit grade
OEM, Private Label and Wholesale Supply
PIROI is a silicone sealant manufacturer in China selling direct to importers, distributors and private-label brands. There is no trading company between you and the production line.
A Silicone Sealant Factory, Not a Trading House
We formulate and fill on the same site, so quotation, formulation changes and delivery dates are all decided by the people who produce your order. Buyers who compare several silicone sealant manufacturers in China usually find that only some of them are actually the factory — this is one of the ones that is. If you need a silicone sealant supplier in China who will put the specification in writing before you pay a deposit, that is what this page is for.
Silicone Caulk Manufacturers for Your Own Brand
Our OEM and private label programme starts at 1,000 pcs per model. Cartridge artwork, colour matching, your brand name and your own language on the label are all handled in-house. Mixed-model trial orders start from 3,000 pcs in total, and stock items from 500 pcs.
Wholesale Pricing Without a Second Margin
Buyers looking for silicone sealant wholesale suppliers often receive a quotation from a reseller. We quote as the manufacturer, so the price carries one margin instead of two, and one party stays responsible if anything goes wrong with the batch.
Export-Ready Supply
Cartons, pallet plans for 20 ft and 40 ft containers, and the full document set: FORM E, packing list, Certificate of Analysis and third-party test reports. We ship from Shenzhen (Yantian / Shekou) and Nansha.
How to Tell a Real Silicone Sealant Factory in China from a Trading Office
Search results for “silicone sealant factory China” are dominated by listings that never touch a mixing tank. Three checks separate the two: the address on the business licence, the name that signs the Certificate of Analysis, and whether the mixing and filling lines sit on the same site. At PIROI all three point to the same place — No. 19 Kuinan Road, Dayan Industrial Zone, Huangpu Town, Zhongshan, Guangdong, with every report issued in PIROI’s own name rather than a third party’s. Ask each candidate those three questions before you send a specification; the ones that are genuinely the factory will answer without hesitating.
Markets We Supply From Zhongshan
We are a silicone sealant manufacturer in China — not a locally registered manufacturer in the countries below. Many silicone sealant suppliers in these markets are resellers of exactly that kind of factory, and we are the factory side of that chain. What we offer those markets is direct factory pricing, export documentation and technical support across the time-zone gap. Below is what buyers in each market usually need to settle before ordering.
UAE & Saudi Arabia — Heat, UV and Document Legalisation
Importers and distributors in the UAE, Dubai, Abu Dhabi and Saudi Arabia buy mostly neutral-cure weatherproof and structural grades, because a dark facade in Gulf summer reaches surface temperatures far above ambient. The usual blockers are not the sealant but the paperwork: FORM E, legalised commercial documents and shelf-life dating on the carton. Tell us the port and the consignee requirements and we build the document set to match.
Turkey — Mid-Size Orders and Mixed Models
Turkish buyers are typically strong on formulation detail and often order across several models at once. Our mixed-model trial order policy (3,000 pcs total across models) exists for exactly this pattern. Neutral cure, acetoxy and sanitary grades can be combined in one container.
Malaysia, Vietnam, Singapore & the Philippines
Southeast Asia is our shortest shipping lane and our closest working relationship with buyers. Transit is 3–5 days to Ho Chi Minh and Haiphong and 5–7 days to Bangkok, with Malaysia, Singapore and the Philippines served through the same Shenzhen and Nansha sailings. The climates are hot and humid year-round, so tropical mould resistance and neutral cure on metal are the two questions that come up most.
UK & Europe
Buyers in the United Kingdom and across Europe need REACH-relevant documentation, batch traceability and a Certificate of Analysis per batch. We hold ISO 9001:2015 and archive retained samples for 18 months per batch. If you are comparing silicone sealant manufacturers in Europe with a Chinese factory, the practical differences are lead time, MOQ and who carries the import — we will put all three in writing before you commit.
United States
US buyers usually specify against ASTM C920 rather than the Chinese GB/T standards our products are certified to. We can supply the GB/T test reports and the formulation data behind them, but we do not claim ASTM certification we do not hold. If your specification requires ASTM, tell us at enquiry stage so we can confirm what is and is not available.
Pakistan, Vietnam & Other Markets
For importers in Pakistan, Vietnam and markets not listed above, the same terms apply: direct factory quotation, one margin, export packing and the document set your customs broker needs. We currently work with buyers in more than 30 export markets with a Southeast Asian focus, and we will tell you honestly if your market is new to us.
Supply Terms for Importers and Wholesalers
We supply silicone sealant on wholesale terms for importers, private label brands and distributors worldwide, shipped direct from the Zhongshan plant with export documentation prepared to match the consignee requirements.
Silicone Sealant Wholesale Terms
Wholesale pricing steps with container fill rather than sliding smoothly, so a full pallet and a mixed-model container are different price points. Ask for a quotation against a defined specification and you get a comparable number. MOQ: OEM and private label from 1,000 pcs per model, mixed-model trial orders from 3,000 pcs total, stock items from 500 pcs.
Export-Ready from China
We ship from Shenzhen (Yantian / Shekou) and Nansha, with 7–15 days direct sea freight to Ho Chi Minh, Bangkok, Port Klang and Jakarta. Every shipment ships with FORM E, packing list, Certificate of Analysis and third-party test reports — no chasing paperwork.
Silicone Sealant Exporter and Supplier
As a silicone sealant exporter and supplier selling direct to importers, distributors and private label brands, there is no trading company between you and the production line. Eight automated filling lines with in-process checks and batch testing keep repeat-order lead times stable.
Neutral and Structural Silicone Sealant Supplier
We are a neutral silicone sealant supplier and a structural silicone sealant supplier from the same plant, so both grades run on the same eight filling lines under one Certificate of Analysis. China importers receive the batch approved at sampling, and contract buyers get the same neutral silicone sealant wholesale terms as private label accounts. Mixed-model trial orders start from 3,000 pcs total against a 1,000 pcs per model MOQ.
Specification Backed by the Factory
Every batch that leaves this neutral silicone sealant factory is batch-coded and archived for 18 months with its own retained sample, so a structural grade order placed here traces back to its raw material lot years later. Send the joint detail and the substrate, and formulation matching answers with a named model and a test report rather than a catalogue.
Factory Address & Contact
Factory Address
No. 19, Kuinan Road, Dayan Industrial Zone, Huangpu Town, Zhongshan, Guangdong, China
Ports We Ship From
Shenzhen (Yantian / Shekou) and Nansha — 3–5 days to Ho Chi Minh / Haiphong, 5–7 days to Bangkok.
Booking a Factory Visit
We welcome buyer audits and third-party inspections. Contact us at least 5 working days in advance so we can arrange samples and staff.
Talk to Us Directly
WhatsApp +86 18125397156 · Email info@zspiroi.com · We reply within 24 hours.