---
product_id: 48280077
title: "Everbuild Everflex 450 Premium+ Builders Silicone Sealant – Waterproof Seal – Suits Most Building Materials – Internal and External Use – Black – 300ml"
brand: "everbuild"
price: "A$30"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/48280077-everbuild-everflex-450-premium-builders-silicone-sealant-waterproof-seal-suits
store_origin: AU
region: Australia
---

# 100% waterproof seal ±25% flexibility for expansion multi-surface adhesion Everbuild Everflex 450 Premium+ Builders Silicone Sealant – Waterproof Seal – Suits Most Building Materials – Internal and External Use – Black – 300ml

**Brand:** everbuild
**Price:** A$30
**Availability:** ✅ In Stock

## Summary

> 🖤 Seal it like a pro — waterproof, flexible, and built to last!

## Quick Answers

- **What is this?** Everbuild Everflex 450 Premium+ Builders Silicone Sealant – Waterproof Seal – Suits Most Building Materials – Internal and External Use – Black – 300ml by everbuild
- **How much does it cost?** A$30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/48280077-everbuild-everflex-450-premium-builders-silicone-sealant-waterproof-seal-suits)

## Best For

- everbuild enthusiasts

## Why This Product

- Trusted everbuild brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Low Dirt Pick-Up Formula:** Keeps your seal looking pristine longer, perfect for visible window and door frames.
- • **Flexible Expansion Mastery:** Certified ±25% flexibility ensures durability on expansion joints, even in cold climates.
- • **Paint-Friendly & UV Stable:** Works flawlessly over water and solvent-based paints with excellent UV resistance for lasting aesthetics.
- • **Ultimate Waterproof Defense:** Creates a permanent, weatherproof seal that stands up to rain, roof joints, and parapets.
- • **Universal Surface Compatibility:** Bonds seamlessly to glass, metal, wood, PVCu, and more—your all-in-one sealing solution.

## Overview

Everbuild Everflex 450 Premium+ is a 300ml black silicone sealant engineered for both internal and external use. It offers superior waterproofing, high flexibility with ±25% movement capability, and strong adhesion to a wide range of building materials including glass, metals, plastics, and wood. Ideal for expansion joints and perimeter pointing, it resists plasticiser migration, dirt pick-up, and UV damage, making it a versatile, durable choice for professional-grade sealing applications.

## Description

Everflex 450 Premium+ Builders Silicone Sealant – Waterproof Seal – Suits Most Building Materials – Internal and External Use – Black – 300ml

## Features

- MULTI-PURPOSE – This strong, neutral cure low modulus sealant is ideal for use on expansion joints. It's perfect for internal and external perimeter pointing around PVCu, wood and other window frames.
- VERSATILE – Adheres and seals to most substrates including glass, metals, plastic, and wood. It's compatible with acrylic, polycarbonate and lead and has low dirt pick-up for work with PVCu.
- HIGH RESISTANCE – High resistance to plasticiser migration. Suitable for use over water-based and solvent-based paints.
- FLEXIBLE – Ideal as an expansion joint sealant with a +/- 25% flexibility factor, certified for façade, glazing, cold climate and sanitary applications.
- WATERPROOF – Forms a permanent waterproof seal for parapets and roofs and joint sealing to pre-formed panels with excellent UV stability. It provides general glazing, sealing and draughtproofing.
- RANGE OF COLOURS – Also available in buff, Brown, grey, oak, translucent, and white.
- Silicone 450 Builders Silicone
- Size: 310ml
- Brand: Everbuild

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Sika Everbuild |
| Part Number | EVB450BL |
| Product Dimensions | 4.9 x 4.9 x 23 cm; 380 g |
| Item model number | 450BK-EBD |
| Size | 300 ml |
| Colour | Black |
| Style | CLASSIC |
| Material | Silicone |
| Item Package Quantity | 1 |
| Number of Pieces | 25 |
| Special Features | Strong, Waterproof |
| Included Components | 1x Cartridge |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 380 g |

## Product Details

- **Material:** Silicone
- **Brand:** Everbuild
- **Style:** CLASSIC
- **Item weight:** 0.38 Kilograms
- **Item dimensions L x W x H:** 49 x 49 x 230 millimetres

## Images

![Everbuild Everflex 450 Premium+ Builders Silicone Sealant – Waterproof Seal – Suits Most Building Materials – Internal and External Use – Black – 300ml - Image 1](https://m.media-amazon.com/images/I/71HdixbchDL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Can this sealant be overpainted?**
A: According to the manufacturer's guidelines, no, but I have successfully painted over the white version of this product with water-based exterior emulsion. It requires a few coats, and the paint has to be fairly thick, but the finish isn't too bad. Depends on materials, and I don't know if it has any negative effect on the sealant in terms of longevity or performance and if in doubt, stick to the manufacturer's guidelines.

**Q: Is this 100% silicone plz ?I need it to be 100%, I know most say  silicone but have additives, I need pure 100% silicone plz**
A: Hi, 450 Builders Silicone is 100% silicone.

**Q: is this sealent shiny or matt?**
A: It's not very shiny but I wouldn't say it's Matt. Very good sealent tho

**Q: Will this seal a joint in a black granite kitchen work top and splash back?**
A: Yes no problem

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.au/products/48280077-everbuild-everflex-450-premium-builders-silicone-sealant-waterproof-seal-suits](https://www.desertcart.com.au/products/48280077-everbuild-everflex-450-premium-builders-silicone-sealant-waterproof-seal-suits)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-02*