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UltraScape Prem-Flex Grout 

£20.82 Ex. VAT - £24.98 Inc. VAT

Looking for a flexible, paving grout ideal for porcelain and ceramic tiles or slabs? UltraScape Prem-Flex is an internal & external paving grout for porcelain, natural stone & ceramic slabs. Available in three beautiful colours grey, limestone and charcoal, Prem-Flex accommodates joint widths from 1-20mm, and comes supplied as 3 x 3kg bags in a tub. Simply mix with water to provide a super smooth exterior grout.

For more information, trade prices or full pallet deals (40 per pallet) call our team of experts on ☎️ 0330 122 1025

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Please see our FAQ’s for more information.

Delivery & Returns Info

Delivery is calculated on size & weight of order, charges displayed when added to basket. Small orders via courier, larger orders via Pallet Network (Click & Collect available call 0330 122 1025 or 01827 794 350). Need further info, click here.

Weight Price Volume
0-13KG£9.00+VAT1 Small Bag / Tub
13.01-25KG £10.00+VAT1 Large Bag / Tub
25.01-50KG £19.00+VAT 2 x Bags / Tubs
50.01-75KG£28.00+VAT 3 x Bags / Tubs
75.01-100KG£36.00+VAT4-5 Bags /Tubs
100.01-249 KG£42.50+VAT 5-9 Bags / Tubs
249.01-750KG£47.50+VAT10 Bags Plus
750.01KG + £50.00+VAT 30 Bags Plus
Full Pallets FOC* £0.0052 Tubs / 56 Bags
Premium Next Day Service+avg. £15 Click here for prices
Scotland Delivery Service Click here for prices
Local Delivery & Click & Collect: ☎️ 0330 122 1025

*Small additional charges may apply to certain parts of Scotland or areas with HGV Restrictions. Next Day delivery + £15 (*exc. apply – Full Pallets £80 on a Next Day Service)

Returns, cancel up to 14 days from date of delivery. Product to be returned in the same condition & packaging. No returns for cementitious & perishable products. You are responsible for returning goods to The Paving Experts. Need further info, click here.

For any advice; technical, product, stock or quantity needed, call our team on 0330 122 1025.

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Slab Width

Slab Length

Joint Width

Joint Depth


UltraScape Prem-Flex Grout – Exterior Grout For Porcelain

UltraScape Prem-Flex is a flexible, internal & external tile & paving grout that has been specially designed for porcelain paving, but can also be used with all types of natural stone and ceramic paving. Prem-flex is cement based, with added polymers and fine aggregates which provide a super smooth jointing grout, for joint widths from 1-20mm. Prem-Flex comes in three beautiful, contemporary colours Grey, Limestone, Charcoal and is ideal for domestic patios and external paving that will receive light foot traffic.

Supplied in 9KG tub, with 3x3KG bags within, each bag of Prem-Flex is mixed on site with water and applied to the paving joints with a rubber edged trowel, float or squeegee. Prem-flex can receive light foot traffic in 3-4 hours and sets in just 12 hours. Prem-Prime is ideal for use in dry conditions, in temperatures between 5-25 degrees, it is not advisable to use in wet weather or frosty conditions.

  • Designed for use with porcelain tiles & paving
  • Can also be used with natural stone & ceramic paving
  • For internal & external use
  • Available in 3 colours: Grey, Limestone, Charcoal
  • Joint widths: 1-20mm
  • Just add water
  • Workability: 30-60 minutes
  • Light foot traffic: 3-4 hours
  • Set time: 12 hours
  • Size: 3 x 3kg bags in a bucket
  • Weight: 9KG
  • Storage: Keep cool, dry and frost free at temperatures between 5-25 degrees
  • Shelf Life: 12 months
  • 40 tubs per Pallet on Full Pallet Deals


Prior to grouting ensure that your paving is firmly fixed, solid and stable. All paving joints should be completely clean – free of debris, dirt, sand, aggregates, leaves or grass. The joints should be clear to the full depth of the paving and free of any hardened bedding mortar (ideally removed before it has cured], which allows the joints to be filled with grout to the full depth, creating better stability and a longer lasting weed free joint!

How do I mix UltraScape Prem-Flex?

UltraScape Prem-Flex comes supplied as 3 x 3KG bags in a bucket. We advise mixing a single bag at a time for external paving, however as a rule of thumb if you do choose to mix more, do not mix more than can be used within a 30-40 minute period. UltraScape Prem-Flex should be added slowly, to clean water (powder to water) in a large bucket in the approximate volume ratio as indicated on the packaging. Mix until a smooth, cake batter consistency is achieved, then leave to stand for 2 minutes, then remix the grout. Do not add any additional water as this can weaken the final strength of the grout. Once you have mixed and started to use Prem-Flex grout, never re-wet with additional water to change the consistency as this will weaken the final cured strength and may result in crumbling at a later date.

How do I apply UltraScape Prem-Flex?

Once mixed, UltraScape Prem-Flex should be applied over the paving or tiled joints using a rubber edged trowel, float or neoprene squeegee. Carefully work the mixed grout into the joints, diagonally a small section at a time. Ensure the joints are completely filled, without voids, before moving on to the next section. Any excess Prem-Flex paving grout should be removed off the surface of the paving as you go.

When preparing to joint external paving slabs, we advise looking for a window of a couple of days with dry weather. Grouting should ideally be carried out in completely dry conditions and remain dry for 24 hours post application, whilst the grout cures. Ideal temperatures for applying Prem-Prime grout are 5 – 25oC. Do not use in wet weather or frosty conditions. Avoid direct sunlight and higher temperatures as this will accelerate the curing of the grout. If joints appear to be drying too quickly due to warmer conditions or the absorbency of the paving, then a gentle misting of clean water may help to keep the joints damp. Do not soak with water, or allow any pooling or ponding water to develop over the paved area.

How do I clean and wash off UltraScape Prem-Flex from my paving?

To clean UltraScape Prem-Flex off your external tiles or paving slabs we would recommend the use of a wash boy, a firm sponge and plenty of clean water, which will remove the grout residue and provide a completely smooth joint finish. Any grout residue left on the face of the paving, can be removed by wiping with a clean damp sponge at the point when the grout has started to firm up – approximately 15 -30 minutes depending on temperature, humidity and the absorbency of paving. Non-absorbent paving such as porcelain or ceramics may take a little longer, but this will be dependent on weather conditions. Any dry Prem-Flex grout or residue remaining on the face of the slabs once washed down can be polished off the face of the paving with a soft dry cloth. Do not attempt to clean or wash down the paving, until the grout is firm to the touch. Cleaning to early may lead to removal of grout from the joints and potential shading variation once dry.  Textured or riven paving may need additional cleaning due to the surface finish.

How to clean off your tools after using UltraScape Prem-Flex.

Tools should be thoroughly cleaned with water to remove excess material immediately after use and before the grout sets. Water should not be emptied into the drainage system as this may block drains with hardened cement material.



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