Out of stock
Dunking Biscuit Optik Water Repellent Glass Cleaner

Water repellent exterior glass cleaner

Dunking Biscuit Optik Water Repellent Glass Cleaner

SKU DB2020GC1 Ask a question

Ask a question

We reply by email, usually the same working day.

Notify Me When Back in Stock

By asking for an alert you also join The Drivers HQ email list for news and offers. You can unsubscribe at any time.

£9.95

Out of stock

Size 500ml

Ask when it is back

In stock now

Dunking Biscuit Optik Water Repellent Glass Cleaner Dunking Biscuit Optik Water Repellent Glass Cleaner £9.95
Click & Collect: Ilkeston · FreeMost eligible orders are ready within 5 minutes during opening times. Please wait for your collection-ready confirmation before travelling. Click & Collect: Ilkeston Not available for this option. Options that can be collected show it here. How it works

Optik is an orange liquid in a 500ml trigger spray bottle, the name in orange script on the black Dunking Biscuit label above a band that reads Water Repellent Glass Cleaner. It is for the outside of the glass, where it cleans and leaves a water repellent layer, and it needs no dilution. There is a 100ml sample to try it first.

  • Durable water repellent chemistry
  • Provides a hydrophobic barrier
  • No dilution required
  • 500ml bottle size
  • Streak free sparkling finish
  • Improves visibility in adverse conditions
  • Reduces need for wiper use
  • Simple spray and buff application
Read the full description

Full Description

Optik is an orange liquid in a 500ml trigger spray bottle, the name in orange script on the black Dunking Biscuit label above a band that reads Water Repellent Glass Cleaner. It is for the outside of the glass, where it cleans and leaves a water repellent layer, and it needs no dilution. There is a 100ml sample to try it first.

Dunking Biscuit

Optik is Dunking Biscuit's dedicated external glass cleaner which boasts durable water repellent chemistry.

  • Provides a hydrophobic barrier
  • Incredibly simple to use
  • Super durability

More in Glass Cleaners.

Royal Mail Tracked 24 from £3.95, free over £100.Delivery details

Delivery and collection

Full Delivery Information

Buying for someone? Gift cards from £30, by email or post.Gift cards

Secure checkout
  • Apple pay
  • Diners club
  • Discover
  • Google pay
  • Klarna
  • Maestro
  • Master
  • Paypal
  • Shopify pay
  • Unionpay
  • Visa

Key features

  • 500ml Bottle
  • Hydrophobic Barrier
  • No Dilution
  • Exterior Glass

The Drivers HQ

Expert Notes

Dunking Biscuit's Optik is a dedicated exterior glass cleaner built around the brand's water repellent chemistry. Supplied ready to use in a 500ml bottle with no dilution needed, it is applied by lightly spraying onto the exterior glass, spreading evenly and buffing with a glass cloth for a streak free, sparkling finish. Beyond cleaning, Optik leaves a hydrophobic barrier on the glass that repels water and is marketed for its durability, which can reduce reliance on windscreen wipers in wet conditions. It suits anyone who wants clearer visibility in poor weather and pairs well with a dedicated glass cloth and an anti-fog interior glass cleaner as part of a wider detailing routine.

Perfect For / Suitable Surfaces

  • Windscreens
  • Front and rear side windows
  • Rear windows
  • Wing mirrors
  • Sunroof glass
  • Other exterior vehicle glass

Caution: Optik is formulated for exterior glass only. Test on a small hidden area first and wipe away any overspray from paint or trim promptly.

Technical Specifications

Product Type
Glass Cleaner
Brand
Dunking Biscuit
Use
Exterior Glass Cleaning
Size
500ml
Dilution
No Dilution Required
Application Method
Spray And Buff With A Glass Cloth
Compatibility
Suitable For Exterior Vehicle Glass
Weight
0.60kg
Dimensions
6.5 x 6.5 x 19cm

How To Use

Application

  1. Lightly spray Optik directly onto the exterior glass.
  2. Spread the product evenly across the glass surface.
  3. Buff off with a glass cloth while the glass is still slightly damp.
  4. Work in sections so the product does not dry before buffing.

Aftercare

  1. Store the bottle upright in a cool, dry place out of direct sunlight.
  2. Keep the cap tightly closed between uses.
  3. Wipe the trigger spray head clean after use to stop it clogging.
  4. Reapply as needed once water stops beading on the glass.

Top Tip: Buff while the glass is still slightly damp for the clearest, most streak free finish.

Performance Benefits

  • Repels water from the glass
  • Improves visibility in adverse conditions
  • Reduces need for wiper use
  • Leaves a streak-free finish
  • Designed for easy spray and buff use
  • Durable water repellent effect

Frequently Asked Questions

What size does Optik Water Repellent Glass Cleaner come in?

It comes in a 500ml bottle, which weighs 0.60kg.

Do I need to dilute Optik before use?

No, Optik is supplied ready to use and needs no dilution.

Which glass can I use Optik on?

Optik is Dunking Biscuit’s dedicated external glass cleaner, so it is designed for exterior glass such as windscreens, windows and mirrors.

How do I apply Optik?

Lightly spray it directly onto the exterior glass, spread evenly and buff with a glass cloth for a streak free finish.

What does the water repellent layer do?

It adds a water repellent layer that repels water and improves visibility in adverse conditions, reducing the need for continuous wiper use.

Is Optik durable once applied?

Yes, Dunking Biscuit markets Optik for its durability once applied to the glass.

What should I buff it off with?

Buff with a glass cloth for a streak free, sparkling finish.

Can I use it on tinted or coated glass?

No specific compatibility with tinted or coated glass is stated by Dunking Biscuit, so test on a small hidden area first.

HQ Suggests Tips & Insights

  1. Apply Optik out of direct sunlight for an even finish.
  2. Test on a small hidden area first.
  3. Use a clean glass cloth to buff away residue.
  4. Reapply when water stops beading on the glass.
  5. Keep separate cloths for glass and paintwork.
  6. Store the bottle upright with the cap closed.
  7. Avoid spraying onto trim or painted panels.
  8. Wipe the spray nozzle clean after each use.

The Brand

Dunking Biscuit

Dunking Biscuit, full name Dunking Biscuit Effortless Detailing, is a car care range that was made by Dunking Biscuit Ltd. On its own website the brand said it produced detailing products for car enthusiasts and detailing professionals, and that detailing is in its DNA, driving it to make products that are simple to use but highly effective. Its range ran from shampoos and snow foams to hybrid paint sealants and quick detailers, with accessories to help with application, removal and maintenance.

The Drivers HQ stocks Dunking Biscuit across car shampoos, snow foams, glass cleaners, wheel cleaners, quick detailers, tyre dressings, microfibre washes and spray air fresheners. Highlights include Aura Ceramic Quick Detailer, Blitz Wheel and Tyre Cleaner, Citrus Blast Bug and Grime Remover, Elixir Plastics and Trim Dressing and Dynamic Microfibre Wash Liquid, with some of them also available in 2500ml bottles or as samples. There is also the Show Wax 01 Cure Kit, the Rim Ticklers Wheel Woolies, The Dunking Hauler detailing bag and Air Fresh in Cherry Cola, Grape and Lemon.

Dunking Biscuit suits enthusiasts who want an easy to use range that still covers every stage of a proper wash. A typical routine starts with a pre-wash on bug splats and road grime, then a wheel and tyre clean before the contact wash with a shampoo and two buckets. After drying, a quick detailer or wax adds gloss and protection, while a trim dressing and glass cleaner finish the exterior. Washing your microfibres with a dedicated liquid helps keep them absorbent for the next detail.

Buy Dunking Biscuit from The Drivers HQ with tracked UK-wide delivery, or visit our walk-in store in Ilkeston, Derbyshire, where Click & Collect is free. Whether you are topping up a favourite quick detailer, trying a new wheel cleaner or picking up an air freshener, you can combine Dunking Biscuit with the rest of your detailing and car care essentials in a single order.

Shop all Dunking Biscuit
Dunking Biscuit Air Fresh Cherry Cola and Grape sprays either side of The Dunking Hauler detailing bag on a black display plinth

Built Around Effortless Detailing

The brand's full name, Dunking Biscuit Effortless Detailing, sums up its approach. In its own words, detailing was in its DNA, driving it to provide products that are simple to use but highly effective in what they do, made for car enthusiasts and detailing professionals alike. The company's website listed its address in Heanor.

Dunking Biscuit set out three promises on its website: continuous improvement through cutting edge product design, always being responsive to its customers, and delivering products that show exceptional value for money. It also offered sample selection boxes as a way for drivers to get an insight into its products and its values.

Dunking Biscuit Rim Ticklers wheel woolie cleaning a foamed alloy wheel on a white car

From Pre-Wash to Show Wax

Citrus Blast Bug and Grime Remover is a pre-wash cleaner for stubborn dirt, grime and bug splats. Dunking Biscuit says its formula thickens once applied and clings to the paint like a gel to loosen road grime, salts and bug splats, and that it is designed to be safe on all surfaces, waxes and sealants. For the wheels, Blitz Wheel and Tyre Cleaner is non-acidic and non-caustic, and can be used anywhere from neat to a 10:1 dilution depending on how dirty the wheels are.

Aura Ceramic Quick Detailer is an SiO2 infused spray for paintwork, metal, glass and plastics. The brand says a simple spray and wipe gives 3 months of protection, and that Aura works as a maintenance topper over existing protection while removing dust, watermarks and fingerprints. Show Wax 01 is blended from a range of waxes including Carnauba T1 grade wax, and the brand describes it as easy on, easy off, with a show ready shine and a fresh lemon scent.

Aftercare is covered as well. Elixir Plastics and Trim Dressing is a gel that the brand says restores dull, faded trim with a deep waterproof shine and protection for up to 4 weeks, and Dynamic Microfibre Wash Liquid is a mild, concentrated wash made to keep microfibres absorbent, by hand or in the machine. The Dunking Hauler holds 35 litres of kit, with custom loops to keep bottles secure and mesh pockets on the outside.

  • Product AdviceAsk for help choosing compatible products and equipment.
  • Trade MembershipTrade Members get 10% off every product except sale items and gift cards.
  • Shop in StoreBrowse products and speak to the team in Ilkeston.

Best Paired With

Customer Reviews

No reviews yet. Tell other drivers what you think of it.

HQ Rewards members who bought it earn 10 points for an approved review, 20 with a photo or video, whatever the rating. Review policy

    Write a Review

    Your rating

    NOT SURE THIS IS THE RIGHT ONE?

    Ask Before You Buy

    Tell us about the vehicle, surface, equipment or result you are working with. Advice is available before you buy, not only after something has gone wrong.

    Get Product Advice Visit the Ilkeston Store