Whether you’re a seasoned tradesperson or a keen DIY enthusiast, choosing the right silicone or adhesive can make the difference between a flawless, long-lasting finish and a job that needs redoing six months down the line. With so many products on the market, each designed for specific materials, environments, and applications, it’s easy to feel overwhelmed when standing in front of the shelves.

This guide cuts through the confusion. We’ll walk you through the key types of silicones and adhesives available, what each one is best used for, and how to choose the right product for your specific project.

Why the Right Silicone or Adhesive Matters

Not all adhesives are created equal. Using the wrong product can lead to poor bonding, unsightly residue, cracking, or even structural failure over time. Silicones and adhesives are formulated differently to handle varying levels of heat, moisture, flexibility, and surface compatibility, so understanding the basics before you buy will save you time, money, and frustration.

We stock a wide range of professional-grade silicones, adhesives, and cleaners suited to trade and domestic use alike. Here’s everything you need to know before making your purchase.

Types of Silicone and What They’re Used For

Acetoxy (Acid Cure) Silicone

Acetoxy silicone is one of the most widely used types and is easily identified by its distinctive vinegar-like smell during application. It cures quickly and bonds strongly to non-porous surfaces such as glass, ceramic tiles, and most metals, making it a popular choice for bathroom and kitchen sealing.

However, it’s worth noting that acetoxy silicone is not suitable for use on natural stone, concrete, or certain metals like copper and brass, as the acetic acid released during curing can cause staining or corrosion. Always check compatibility before application.

Best for: Bathrooms, kitchens, glazing, general sealing around sinks and baths.

Neutral Cure Silicone

Neutral cure silicone releases no acidic by-products during curing, making it far more versatile and suitable for use on a broader range of materials. This includes natural stone, marble, concrete, copper, and many plastics. It’s slightly slower to cure than acetoxy silicone but offers excellent long-term flexibility and adhesion.

If you’re working with uPVC windows, doors, or cladding, neutral cure silicone is typically the recommended choice as it won’t react with or degrade the material over time.

Best for: uPVC frames, natural stone, concrete, aluminium, and sensitive substrates.

Sanitary Silicone

Sanitary silicone is specifically formulated for wet environments and contains added fungicides to prevent the growth of mould and mildew. It’s the go-to product for sealing around baths, showers, sinks, and wet rooms. While all silicones offer some degree of water resistance, sanitary-grade products are engineered to withstand constant moisture exposure without discolouring or deteriorating.

Best for: Bathrooms, wet rooms, showers, and anywhere prone to high humidity.

Fire Rated Silicone

In commercial or construction settings, fire rated silicone is essential. These specialist products are designed to remain stable and prevent the spread of fire and smoke through gaps and joints for a defined period. They’re commonly used around pipe penetrations, cable runs, and structural joints in buildings where fire safety compliance is required.

Best for: Commercial buildings, fire compartmentation, pipe and cable penetrations.

Types of Adhesive and When to Use Them

Contact Adhesive

Contact adhesives work by applying the product to both surfaces, allowing it to become touch-dry, and then pressing the two surfaces firmly together for an instant, powerful bond. They’re ideal for large surface areas such as bonding laminates, rubber, leather, and fabrics. The bond is immediate, so careful positioning before contact is essential.

Best for: Laminates, rubber, foam, and large surface bonding.

MS Polymer Adhesive

MS (Modified Silicone) polymer adhesives are increasingly popular in trade applications because they combine the best properties of both silicone and polyurethane. They’re paintable, UV stable, low odour, and offer excellent flexibility and adhesion to a wide range of materials including plastics, metals, wood, and concrete. They’re also solvent-free, making them safer to use indoors.

Best for: General construction bonding, multi-material projects, interior and exterior applications.

Solvent Cement (Plastic Weld)

For bonding plastic to plastic, particularly uPVC, solvent cement is the specialist solution. Rather than simply gluing two surfaces together, solvent cement chemically welds them at a molecular level, creating a bond that is often stronger than the material itself. It’s widely used in plumbing, roofline installation, and plastic fabrication.

Best for: uPVC pipes, fittings, guttering, and plastic fabrication.

Don’t Forget the Cleaner

Preparation is everything when it comes to achieving a strong, lasting bond. Applying silicone or adhesive to a dirty, greasy, or damp surface will significantly reduce performance. Using a dedicated surface cleaner or activator before application removes contaminants and, in some cases, primes the substrate for better adhesion.

Browse our range of cleaners and primers to ensure your surface is properly prepared before you start.

Quick Buying Checklist

Before purchasing, ask yourself:

What surfaces am I bonding or sealing? – Material compatibility is the most important factor.
Will it be exposed to moisture or extreme temperatures? – Choose products rated for the environment.
Does it need to be flexible? – Some adhesives are rigid when cured; others remain flexible.
Is the area food-safe or sanitary? – Look for products specifically formulated for those environments.
Does it need to be paintable? Not all silicones can be painted over – check the product spec.

Shop Silicones, Adhesives & Cleaners at Plastic Centre

Getting the right product for the right job has never been easier. At The Plastic Centre, we stock a comprehensive selection of professional silicones, adhesives, and cleaners to cover everything from everyday household repairs to large-scale trade installations.