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 with durable water repellent chemistry.

  • Provides a hydrophobic barrier
  • Simple to use
  • Super durability

More in Glass Cleaners.

Royal Mail Tracked 24 from £3.95, free on orders from £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
  • 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 is a car care range created by Dunking Biscuit Ltd in Heanor, Derbyshire, a few miles from our Ilkeston shop. Its products carry playful names, from Feelin' Bubbly shampoo and Velvet snow foam to Melt iron remover and Show Wax 01. Many come in a 500ml bottle, a sample size and a 2500ml bottle. Dunking Biscuit also made Feelin', a pH neutral shampoo created together with The Drivers HQ.

At The Drivers HQ we stock Dunking Biscuit online with UK delivery and in our Ilkeston shop. Popular choices include Feelin' Bubbly pH Neutral Shampoo, Velvet Ultra Snow Foam and Aura Ceramic Quick Detailer.

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

Dunking Biscuit wash, decontamination and wheels

Pre-wash. Citrus Blast (also 2500ml) is a citrus pre-wash for bug splats and road grime that thickens to a gel once applied. It is safe on waxes and sealants, matte paint and vinyl wraps: spray it on, leave it three to four minutes without letting it dry, then rinse. Velvet (also 2500ml) is a thick, pH neutral snow foam that needs just 25ml in a 1 litre foam lance and lifts dirt in about five minutes; Velvet V2 is the slightly alkaline version, at 15 to 25ml a wash.

Shampoos. Feelin' Bubbly is a high foaming, pH neutral shampoo with anti-marring additives and a tutti frutti scent: 20 to 30ml in a 20 litre bucket, with a second bucket of clean water to rinse the mitt. It comes as a sample and in 2500ml. Feelin' x The Drivers HQ is our shared pH neutral shampoo, with up to 25 washes in a 500ml bottle. Forged (also 2500ml) is a low foaming, SiO2 infused shampoo that leaves a hydrophobic layer, so it tops up existing protection as you wash.

Decontamination. Melt (and sample) is a pH neutral iron fallout remover that clings as a gel, for all wheel types, metals and plastics; leave it no more than five minutes, wear gloves and keep it off vinyl wraps. Purge is a sprayable gel for tar and sticky residue, applied to a dry surface. The Fine Grade Clay Bar (200g) lifts tree sap, fallout and other bonded dirt, used with Loob, a water based clay lubricant.

Wheels and tyres. Blitz (also 2500ml) is a non-acidic, non-caustic wheel and tyre cleaner: neat for heavy dirt, 5:1 for medium and 10:1 for light. The Rim Ticklers are a long and a short synthetic wheel woolie for wheels, exhausts and door shuts. Glitz Creme (and sample) is a water based gel tyre dressing that does not sling: four pea-sized drops on an applicator, then 20 minutes before you drive.

Shop more snow foam, car shampoo and wheel cleaners.

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

Dunking Biscuit protection, interior and kit

Protection and gloss. Aura (and sample) is an SiO2 ceramic quick detailer for paint, metal, glass and plastics, which Dunking Biscuit rates at three months of protection from a spray and wipe. Hydro Boost (and sample) is a polymer rinse sealant rated at up to three months: mix 25ml with 475ml of water, spray it onto the wet car a panel at a time and rinse after about a minute. Quartz (and sample) is a liquid creme hybrid wax sealant that the brand rates at up to nine months. The Show Wax 01 Cure Kit boxes a 100ml tin of lemon scented wax made with T1 grade carnauba, an applicator and two microfibre cloths. Gleam is an all in one polish that cleans, polishes and leaves wax protection for around two months. Immerse is a gloss enhancing detailer for show day finishing, and Elixir is a gel trim dressing that restores faded plastics with protection for up to four weeks.

Interior and glass. Spruce (and sample) is a water based interior detailer for plastics, vinyl, rubber and metal, leaving a non-sticky, anti-static satin finish and a rhubarb scent. Luxour (and sample) cleans, conditions and freshens leather from a 240ml foaming pump. Optik (and sample) cleans outside glass and leaves a water repellent layer, while Vision (and sample) is an ammonia free glass cleaner that leaves a film to resist fogging. Air Fresh comes in 250ml mist bottles of Cherry Cola, Grape and Lemon, sprayed onto carpets and mats.

Care and kit. Dynamic (and sample) is a concentrated wash that keeps microfibre towels and pads absorbent. The Microfibre Wash Mitt has deep strands, a foam core and an elasticated cuff. The Mix Bottle is a 500ml trigger bottle with a label to note what is inside, and The Dunking Hauler is a 35 litre detailing bag, 50 x 25 x 28cm, with bottle loops, Velcro dividers and mesh pockets.

Shop more quick detailers, glass cleaners and microfibre washes.

  • 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