Morrells Induro ISO Wood Floor Sealer/Primer 5L

Name: Morrells Induro ISO Wood Floor Sealer/Primer 5L
Brand: Morrells
Price: 74.67 GBP
Availability: InStock

£74.67

Including VAT, all orders have free shipping

Mix and match any size, length or finish of this product to unlock higher discount tiers

2+ Save 3%

4+ Save 5%

8+ Save 10%

Add 1 more item to unlock 3% savings

Order within
for delivery on

Free Next Working Day Delivery

Free Next Day Delivery on all orders (Please note that occasional delays may occur due to courier disruptions or stock availability).
Orders placed before 3 pm will be dispatched on the same working day for delivery the next working day.
Orders placed after 3 pm on Fridays will be dispatched first thing on Monday for delivery on Tuesday.
Small items are shipped via Royal Mail with 24-hour tracked delivery.
Large and oversized items are shipped via FedEx with next day tracked delivery.
Tracking information will be provided via email or text once your order has been dispatched.
We deliver to mainland UK only.
Orders placed for delivery on a bank holiday or during our closure period will be dispatched on the next standard working day.
Exclusions: Levelling compounds are not eligible for delivery

Click & Collect

Place your order online.
Select the click & collect option at the checkout.
You will receive email confirmation that your order is ready to collect (generally within 5 minutes)

Opening hours: 7am - 4pm Mon-Fri

Collection address:

Wiltshire Wood Flooring Supplies

Unit 1

Penton Business Park

Stephenson Road

Churchfields Industrial Estate

Salisbury

SP2 7NP

Morrells Induro Isosil Shellac Wood Floor Sealer & Primer is a professional alcohol-based barrier sealer formulated with refined shellacs to isolate natural oils, waxes and residual contamination within timber flooring.

It is particularly suited to tropical and naturally oily hardwoods where contaminants may interfere with the adhesion, drying or final appearance of waterborne floor lacquers.

Isosil is also highly useful when refurbishing older timber floors where traces of previous waxes, polishes or treatments may remain within the wood. Once dry, it creates a clear isolation layer ready for overcoating with compatible Morrells Induro floor lacquers.

Supplied in a 5 litre container.

Why Choose Morrells Induro Isosil?

Professional shellac-based barrier primer
Fast drying and rapidly recoatable
Isolates natural oils, waxes and timber contaminants
Ideal for tropical and naturally oily hardwoods
Excellent clarity with minimal colour change
Useful when refurbishing previously treated timber floors
Improves the reliability of subsequent lacquer systems
Compatible with Morrells Induro floor lacquers

Typical Uses

Tropical hardwood flooring
Teak, iroko, merbau and other naturally oily timbers
Resinous timber species
Refurbished floors with possible wax or polish contamination
Timber previously exposed to oils or unknown treatments
Problematic substrates where lacquer adhesion may be affected
Isolation coat beneath Morrells Induro lacquer systems

Wiltshire Wood Recommendation:
Use Morrells Isosil where the timber is naturally oily, tropical, resinous or potentially contaminated. It creates a barrier between the timber and the waterborne lacquer system, helping prevent adhesion, curing and appearance problems.

For clean oak, pine and most standard flooring timbers, use Morrells Induro GP Wood Floor Sealer instead.

Isosil or GP Wood Floor Sealer?

Sealer	System	Best For
Morrells Induro Isosil	Shellac and alcohol-based barrier sealer	Tropical, naturally oily, resinous or potentially contaminated timber floors.
Morrells Induro GP Sealer	Ready-to-use waterborne floor primer	Oak, pine and most clean standard hardwood and engineered flooring timbers.

Isosil is not intended to replace GP Sealer on every floor. Use it where a barrier coat is required because of the timber species, previous treatment or possible contamination.

Compatible Morrells Lacquers

Compatible Finish	System	Best For
Morrells Induro XL1	1K waterborne polyurethane lacquer No catalyst required	Domestic and light to medium commercial floors where convenient ready-to-use application is preferred.
Morrells Induro XL2	2K waterborne polyurethane lacquer Catalyst included	Busy domestic, commercial and high-traffic floors requiring greater abrasion, chemical and mechanical resistance.

Allow Isosil to dry completely before applying the selected Morrells Induro lacquer. Always test the complete sealer and lacquer system on the actual timber before treating the full floor.

Compatible Morrells Wood Stains

Isosil may form part of a coloured Morrells floor-finishing system where a suitable interior wood stain has been applied and allowed to dry fully. The stain, sealer and lacquer system should always be tested together before full application.

Stain Range	Appearance	Application Guidance
Morrells Light Fast Wood Stain	Fast-drying translucent colour with strong grain definition.	Apply evenly, remove excess stain and allow it to dry completely before applying Isosil.
Morrells SCANDI Wood Stains	Contemporary Nordic-inspired natural and pigmented colours.	Carry out a representative stain, sealer and lacquer test to confirm colour and adhesion before treating the floor.

Staining Important: Only use suitable interior wood stains beneath the finishing system. Remove all excess stain and allow it to dry fully. Heavy deposits, wax-containing stains or exterior products may interfere with adhesion and should not be used without confirmation from the manufacturer.

Recommended Morrells Systems

Floor or Condition	Recommended System
Tropical or naturally oily timber	1 thin coat of Morrells Isosil followed by the required coats of Induro XL1 or Induro XL2 .
Previously treated or potentially contaminated floor	Sand and clean thoroughly, carry out a test area, then apply one coat of Isosil followed by the selected Morrells Induro lacquer.
Stained tropical or oily timber	Suitable Morrells interior wood stain , followed by Isosil and the selected Induro lacquer system.
Fine joints and minor surface defects	Fill before final sanding using Morrells Mix & Fill , then complete the sanding and coating system.
Clean oak, pine or standard hardwood	Use Morrells Induro GP Sealer instead, unless contamination is suspected.

Technical Information

Product type	Shellac and alcohol-based barrier floor sealer
Pack size	5 litres
Recommended coats	1 thin, even coat
Approximate coverage	Approximately 40m² per 5 litres
Approximate application rate	Approximately 8m² per litre
Touch dry	Approximately 20 minutes at 18°C
Recoatable	Approximately 90 minutes at 18°C
Colour effect	Excellent clarity with minimal colour change
Application method	Suitable professional floor applicator or compatible roller
Typical use	Tropical, oily, resinous or potentially contaminated timber floors
Recommended conditions	Approximately 18–22°C with good ventilation and controlled airflow
Intended user	Professional use

Coverage and drying times are approximate and will vary according to timber porosity, surface preparation, temperature, ventilation, humidity and application rate.

Floor Preparation

Inspect the floor and countersink protruding nails or fixings.
Sand the timber evenly back to a clean, bare and consistent surface.
Where suitable, fill fine joints after the 80–100 grit sanding stage using Morrells Mix & Fill mixed with clean sanding dust.
Complete the final sanding sequence across the full floor.
Vacuum thoroughly, including joints, edges and corners.
Ensure the surface is dry and free from loose contamination.
Where previous waxes, oils or treatments are suspected, complete a representative adhesion test before full application.
If staining, apply the stain evenly, remove all excess and allow it to dry completely before sealing.

Application

Stir or agitate the product thoroughly before application.
Apply one thin, even coat using a suitable professional floor applicator.
Work methodically with the direction of the timber grain.
Avoid heavy deposits, puddling and excessive overlap.
Maintain good ventilation because the product is alcohol based.
Allow approximately 90 minutes drying at 18°C before overcoating.
Once fully dry, apply the selected Morrells Induro floor lacquer in accordance with its current Technical Data Sheet.

Recommended Application Accessories

Professional floor applicators and compatible rollers for controlled, even application.
Clean trays and application vessels suitable for alcohol and shellac-based coatings.
Professional extraction and vacuuming equipment for complete dust removal before coating.
Suitable PPE and adequate ventilation in accordance with the Safety Data Sheet.

Important: Morrells Isosil is an alcohol-based, fast-drying professional barrier sealer. Keep it away from ignition sources and provide effective ventilation throughout application and drying. It is intended to isolate contaminants, but it cannot compensate for inadequate sanding, active moisture problems or heavily contaminated timber. Always carry out a test area and follow the current Morrells Technical and Safety Data Sheets.

1. What is Morrells Isosil used for?
Morrells Isosil is a shellac-based floor sealer designed to isolate contaminants in timber flooring before applying lacquer finishes. It is particularly useful on tropical hardwoods or refurbished floors where natural oils, waxes, or previous treatments may interfere with lacquer adhesion, drying, or the final appearance of the finish.

2. How do I apply Morrells Isosil?
Morrells Isosil can be applied using a roller, brush, or suitable floor applicator. Ensure the wood surface is clean, dry, and free from sanding dust before application. Apply a thin, even coat across the floor and allow it to dry fully before applying the chosen lacquer finish.

3. How long does Morrells Isosil take to dry?
Under typical conditions (around 18–20°C with good ventilation), Morrells Isosil becomes touch dry in approximately 20 minutes and can normally be recoated after around 90 minutes. Drying times may vary depending on temperature, humidity, and airflow.

4. How many coats of Morrells Isosil should I apply?
In most cases, a single coat of Morrells Isosil is sufficient. The product is formulated to create an effective isolation barrier with one application before applying the lacquer system.

5. What finishes can be applied over Morrells Isosil?
Morrells Isosil is designed to be used prior to applying Morrells Induro floor lacquers such as Induro XL1 or Induro XL2. It helps improve adhesion and reduces the risk of finishing problems caused by contaminants in the wood.

6. Does Morrells Isosil change the colour of the wood?
Morrells Isosil offers excellent clarity and generally has minimal effect on the natural appearance of the timber. As with any wood finishing product, it is recommended to test the product on a small, inconspicuous area before full application.

7. Can Morrells Isosil be used on all types of wood flooring?
Morrells Isosil is particularly suited to tropical hardwoods such as teak, iroko, and merbau, which naturally contain oils that can interfere with lacquer finishes. For most standard European timbers, a water-based primer may also be suitable depending on the finishing system being used.

8. Do I need to sand between Morrells Isosil and the lacquer?
In most cases, sanding between Morrells Isosil and the first coat of lacquer is not required if the lacquer is applied within the recommended recoating time. Always follow the lacquer manufacturer’s recommendations for best results.

9. What coverage does Morrells Isosil provide?
Morrells Isosil typically covers approximately 40m² per 5 litres, depending on the porosity of the timber, surface preparation, and application method.

10. How should Morrells Isosil be stored?
Store Morrells Isosil in a cool, dry place away from direct sunlight and sources of heat. As the product is alcohol based and flammable, the container should be kept tightly sealed when not in use and stored in accordance with the manufacturer’s safety guidance.

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.