Can Sikasil WS-305S be overpainted?

No, this sealant cannot be overpainted once cured.

How does the curing process work?

It cures by reaction with atmospheric moisture, starting at the surface and proceeding to the core.

What are the payment terms?

We accept T/T, LC, D/P, PayPal, Western Union, and small-amount payments.

Sikasil Ws-305s High Performance Neutral-Curing Silicone Weatherproofing Sealant for Caulking

Name: Sikasil Ws-305s High Performance Neutral-Curing Silicone Weatherproofing Sealant for Caulking
Brand: Shanghai Junbond Building Material Co., Ltd.
SKU: 2134211065

Shanghai, ChinaShanghai Junbond Building Material Co., Ltd.

Negotiable

200 Pieces

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Application

Construction

Bonding Function

Caulking

Model NO.

Sikasil WS-305S

Color

Black

Morphology

Pasty

Model No

Sikasil Ws-305s

Shelf Life

12 Months

Cartridge

300ml

Sausage

590ml

Sample

Free

Function

Sealing and Bonding

Sealing

Caulk

Package Design

OEM

Service

One Stop

Rank

Top 1 Manufacturer

QC

4 Time Quality Control

Advantage

Weatherproof, UV Resistant

Sealant

Smooth, No Bubble

Apply

Easy to Apply

Material

Silicone

Classification

Room Curing

Main Agent Composition

Natural Polymer

Characteristic

Waterproof

Promoter Composition

Curing Agent

Transport Package

20pieces/Carton

Specification

590ml

Trademark

Sika

Origin

China

HS Code

3214109000

Production Capacity

10000pieces/Year

Key features

Outstanding Weather Resistance: Excellent UV and weathering resistance ensures long-term durability.

Versatile Substrate Adhesion: Adheres well to glass, metals, plastics, wood, and painted surfaces.

Neutral-Curing Technology: Cures by reacting with atmospheric moisture without corrosive byproducts.

Compliance with International Standards: Meets GB/T 14683 and ASTM C 920 Type S, Grade NS, Class 50 requirements.

Flexible Customization Options: Offers full customization and flexible customization from samples.

Professional Grade Application: Designed for professional users with specific surface preparation needs.

Diverse Packaging Options: Available in 300ml cartridges, 590ml sausages, and 600ml Unipacks.

Company profile

Shanghai Junbond Building Material Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Full Customization, etc. CertifiedExport Year: 6 Years CertifiedNearest Port: Shanghai / Ningbo PortAverage Response Time: ≤9.60h CertifiedTerms of Payment: T/T, LC, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is identified as a Shanghai-based trading company operating in wholesale and retail, with a business scope covering chemical products, sealing fillers, construction waterproofing, insulation and soundproofing materials, hardware, and related import/export activities. It reports ISO9001, ISO14001, ISO45001, national construction silicone rubber certification, and national high-tech enterprise certification. Service procedures, corrective actions, and complaint-handling records are documented, although the approved-supplier list lacks approval signatures or dates. The supplier has no overseas warehouses, showrooms, agents or branches, and no offline trade-show participation. It offers sample-based and full customization but reports no new products in the past year, no ODM service, and no SDK. Production scale claims come from company descriptions of affiliated factories and are not fully aligned with the registered company type. Customer cases and financial performance evidence are insufficient...

CertificationsThe company states that all Junbond products have passed ISO9001, ISO14001, ISO45001, and national certification for the construction silicone rubber industry, and that it holds national high-tech enterprise certification. These are explicit certifications or qualifications reported in the company description.

After-Sales capabilityThe supplier has written procedures and followed records for service-capability assessment, corrective and preventive actions, and customer complaint handling. However, it reports no overseas warehouse, showroom, agent or branch, and no overseas service countries, limiting evidence of localized after-sales support.

R&D capabilityThe supplier reports no new products during the past year, no ODM service, and no available SDK. Although it offers customization, these explicit limitations do not demonstrate product-development or technical-platform strength.

Customization capabilityThe supplier explicitly offers customization from samples, full customization, and flexible customization. These stated service options directly support a positive assessment of customization capability.